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Engineer structural pros in Manassas
Along with being a full service Structural, Civil and Architectural engineering firm, we are also Virginia Class A General Contractors that specialize in structural repairs, renovations and modifications of all types. With the engineering and construction expertise under one roof we can "Analyze, Design and Build" any type of project and provide a central point of contact for all phases of any project. We specialize in Structural Engineering Assessments, Structural Analysis and Design using Wood, Steel, Concrete and Masonry, Architectural Building Plans, Foundation Repairs, Retaining Walls, Interior Wall Removal, Truss and Rafter Repairs, New Home Design-Build projects and much more.
"Structural repair. They did design, got County permit and did the work that passed county inspection. Brian is good in investigation of problem and creating engineering solution.. The workers did a very good job. Very happy with the job."
Jacob M on September 2022
Along with being a full service Structural, Civil and Architectural engineering firm, we are also Virginia Class A General Contractors that specialize in structural repairs, renovations and modifications of all types. With the engineering and construction expertise under one roof we can "Analyze, Design and Build" any type of project and provide a central point of contact for all phases of any project. We specialize in Structural Engineering Assessments, Structural Analysis and Design using Wood, Steel, Concrete and Masonry, Architectural Building Plans, Foundation Repairs, Retaining Walls, Interior Wall Removal, Truss and Rafter Repairs, New Home Design-Build projects and much more.
"Structural repair. They did design, got County permit and did the work that passed county inspection. Brian is good in investigation of problem and creating engineering solution.. The workers did a very good job. Very happy with the job."
Jacob M on September 2022
We are pleased to introduce you to Kamran Ohi. Kamran comes to you with over 30 years of industry experience. He has worked on hundreds of projects including residential, commercial, industrial and institutional. His experince goes back to design of well known landmarks such as Vietnam memorial wall and renovation of Pentagon. Kamran proudly provides structural engineering services to DC and the surrounding areas. His reputation is highly held and he takes each project very seriously. His pricing is very competitive and his workmanship is of the highest quality.
"Very professional and on time. Provided accurate and expert help, highly recommend this company."
Sidd G on January 2025
We are pleased to introduce you to Kamran Ohi. Kamran comes to you with over 30 years of industry experience. He has worked on hundreds of projects including residential, commercial, industrial and institutional. His experince goes back to design of well known landmarks such as Vietnam memorial wall and renovation of Pentagon. Kamran proudly provides structural engineering services to DC and the surrounding areas. His reputation is highly held and he takes each project very seriously. His pricing is very competitive and his workmanship is of the highest quality.
"Very professional and on time. Provided accurate and expert help, highly recommend this company."
Sidd G on January 2025
OGV offers property condition assessments, due diligence, and existing conditions surveys. In addition to structural evaluations and investigations, as a Professional Structural Engineer License Holder (P.E.), we help and provide peer review, required documents and permit inquiries for counties and local agencies.
"Omid showcased professionalism and expertise by responding quickly, even with limited notice. He provided a detailed explanation of a specific item requiring special attention to meet current code standards. Furthermore, Omid certified the deck structure and delivered a thorough report and letter for the county permit reviewer. I wholeheartedly recommend Omid to anyone seeking a dependable and highly skilled structural engineer."
Wilfredo F on April 2025
OGV offers property condition assessments, due diligence, and existing conditions surveys. In addition to structural evaluations and investigations, as a Professional Structural Engineer License Holder (P.E.), we help and provide peer review, required documents and permit inquiries for counties and local agencies.
"Omid showcased professionalism and expertise by responding quickly, even with limited notice. He provided a detailed explanation of a specific item requiring special attention to meet current code standards. Furthermore, Omid certified the deck structure and delivered a thorough report and letter for the county permit reviewer. I wholeheartedly recommend Omid to anyone seeking a dependable and highly skilled structural engineer."
Wilfredo F on April 2025
Whether you want to remodel your existing home or build a brand new one, Thomas Custom Builders can help. Our 70+ years of combined experience as Northern Virginia general contractors and our commitment to quality ensures your custom construction or design-build project will be a success. Be it a master suite, custom kitchen or home addition, we dig deep to learn what’s making you spend your time and resources on this particular project. We honestly discuss the costs associated with your goals, then we deliver what we do best: excellence in custom remodeling. The only thing that counts is finishing your job exactly the way you want it. No compromise.
"From initial design meeting to project completion Thomas Custom Builders kept promises, delivered outstanding work on time and on budget and exceeded our expectations in every way. Their on site team did everything they could to keep the work place clean and tidy so as disrupt our home life as little as possible. Team leadership kept us informed and made sure our questions were answered promptly. They are excellent tradesmen with exceptional skills. I’d give them 10 stars if I could."
Calvin S on March 2025
Whether you want to remodel your existing home or build a brand new one, Thomas Custom Builders can help. Our 70+ years of combined experience as Northern Virginia general contractors and our commitment to quality ensures your custom construction or design-build project will be a success. Be it a master suite, custom kitchen or home addition, we dig deep to learn what’s making you spend your time and resources on this particular project. We honestly discuss the costs associated with your goals, then we deliver what we do best: excellence in custom remodeling. The only thing that counts is finishing your job exactly the way you want it. No compromise.
"From initial design meeting to project completion Thomas Custom Builders kept promises, delivered outstanding work on time and on budget and exceeded our expectations in every way. Their on site team did everything they could to keep the work place clean and tidy so as disrupt our home life as little as possible. Team leadership kept us informed and made sure our questions were answered promptly. They are excellent tradesmen with exceptional skills. I’d give them 10 stars if I could."
Calvin S on March 2025
Marks-Woods Construction Services is a full service general contractor serving Virginia and Washington, DC located in Historic Old Town Alexandria, VA. We have a complete array of services and project types to serve our diverse clientele, including residential and commercial construction. Teamwork is emphasized in our project management style. MW strives for positive collaboration with our clients to achieve all project goals. Customer service and successful communication contribute to our high percentage of repeat clients. Our service is what separates us from our competition. Our company's growth has been consistent, yet conservative by design. MW carefully selects projects that match our resources and skill set to ensure jobs are completed successfully, within budget, and on schedule. MW provides premium quality at a competitive cost with proven reliable performance, while maintaining a safe work environment. MW self performs the majority of its work, rather than using subcontractors. This allows MW to pass along significant cost savings to our clients, along with also providing a higher quality project, in a more aggressive time frame. Ready to discuss your project with the Marks-Woods team? We'd love to chat. For immediate assistance, please visit www.markswoods.com/contact and fill out the Contact Us form today!
"Excellent. We selected Marks-Woods Construction because they worked with us to create a proposal and contract that met our most important goals and stayed within our budget. We enjoyed working with the designers to come up with the details on what we wanted. The construction was done by the MW team of professionals. They know what they are doing, and it shows in the high quality results."
Alan S on March 2021
Marks-Woods Construction Services is a full service general contractor serving Virginia and Washington, DC located in Historic Old Town Alexandria, VA. We have a complete array of services and project types to serve our diverse clientele, including residential and commercial construction. Teamwork is emphasized in our project management style. MW strives for positive collaboration with our clients to achieve all project goals. Customer service and successful communication contribute to our high percentage of repeat clients. Our service is what separates us from our competition. Our company's growth has been consistent, yet conservative by design. MW carefully selects projects that match our resources and skill set to ensure jobs are completed successfully, within budget, and on schedule. MW provides premium quality at a competitive cost with proven reliable performance, while maintaining a safe work environment. MW self performs the majority of its work, rather than using subcontractors. This allows MW to pass along significant cost savings to our clients, along with also providing a higher quality project, in a more aggressive time frame. Ready to discuss your project with the Marks-Woods team? We'd love to chat. For immediate assistance, please visit www.markswoods.com/contact and fill out the Contact Us form today!
"Excellent. We selected Marks-Woods Construction because they worked with us to create a proposal and contract that met our most important goals and stayed within our budget. We enjoyed working with the designers to come up with the details on what we wanted. The construction was done by the MW team of professionals. They know what they are doing, and it shows in the high quality results."
Alan S on March 2021
Before & After Home Improvement Co. is a residential contracting company serving the Prince William County, VA area. Contact us today for expert advice on your next project. We offer only the best quality services and products. Additional email - rickfish108@aol.com.
"Disgusted Customers Rick Fisher d.b.a. Before and After Home Improvement I am only giving a 1 star because I cannot go any lower. If you want professional and courteous service that also includes communication about delays and crew no shows, do not hire Rick Fisher and Before and After Home Improvement. My wife and I hired Rick Fisher and his company in the latter part of June 2018, to build a stamped concrete patio; a small composite deck; and a pergola with the electrical kit for the ceiling fan. The project finally began on August 7, 2018, and was completed around August 28, 2018. We paid Rick approximately $26,000 in 3 timely installments according to the contract. We exceeded our budget on this project because we were impressed with the pictures of Rick’s previous projects and his reviews. “Don’t believe the hype”. It all started with Rick not being able to obtain the county permit for the pergola due to his drawing which lacked specificity to the dimensions and materials used so the structure would be able to withstand strong winds. Rick advised me the permit office required him to hire an engineer which I would need to pay for him to subcontract to provide that information for his drawing to resubmit to the county permit office. Rick never mentioned this to us before we signed the contract, nor was it stipulated in the contract. Rick’s solution was pay for an engineer or don’t do the pergola. I took initiative to contact the permit office and speak with the manager to arrange a meeting with her and Rick. She was able to assist Rick and get the permit approved without the need for an engineer which would have been at my expense. During the course of this project, my wife and I spent entirely too much time, energy, and efforts addressing issues with Rick relative to his lack of responsiveness and doing the job he said he would. These issues were within his span of control and frankly he failed miserably. The materials are of a decent quality, which is why the pictures look great on the web, however; the customer service, commitment to doing the job right is a serious problem. Rick says he only does one job at a time and he will be on the job site everyday to ensure things are done to standard. This was simply not true. Rick has a lot of projects going on and he rarely came by our home. He was not responsive to my calls or text messages regarding his presence and multiple other issues that required communication. Rick told me the job was going fine because he saw the pictures of what was being done. I demanded that he come by my home to physically inspect the progress. He came by and some adjustments were required. Rick does not give you specific days or times when he will come by even when you are requesting a specific day or time. I had to send multiple text messages and calls to get him to do what he initially said he would do. The project was completed on August 28, 2018. On October 7, 2018, I contacted Rick regarding the rust on the staples holding down the electric cord on top of the pergola. Instead of utilizing galvanized staples or some material that does not rust as a result of inclement weather, his crew used regular staples to hold down the electric cord. Now I have rust running along the top of this expensive pergola that we paid Rick about $8,500 to build. The electrical kit was an additional $1,500 approximately. Rick has not come by my home to take care of this issue as of yet. We have a manufactures warranty on the material but nothing from Rick covering us on the workmanship of the project. On October 18, 2018, he sent someone allegedly from his crew to resolve the issue, however; the worker was not prepared to resolve the issue and was going to replace the staples with more of the same staples. Complete Nonsense! I advised Rick this was unacceptable. The deficiency would not take more than 2 hours to resolve, but Rick refuses to come out and take care of it. It’s such a small job, I cannot get another company to come out to do the repair because it’s not feasible. One reputable contractor said he cannot believe the company who did the work did not have the professional common courtesy to fix the problem. In addition to this, when Rick’s crew excavated the yard to lay the patio, they were supposed to leave a trench sufficient for water to flow into the storm drain. Now we have standing water in the yard when it rains. The yard had a trench before they began excavating and we had no issues with standing water. It’s going to cost me $1,000 to have this problem resolved. Perhaps it’s all in the name: Before and After Home Improvement. Beware, you will need repairs Before and After Home Improvement allegedly completes your project!"
Paul B on December 2018
Before & After Home Improvement Co. is a residential contracting company serving the Prince William County, VA area. Contact us today for expert advice on your next project. We offer only the best quality services and products. Additional email - rickfish108@aol.com.
"Disgusted Customers Rick Fisher d.b.a. Before and After Home Improvement I am only giving a 1 star because I cannot go any lower. If you want professional and courteous service that also includes communication about delays and crew no shows, do not hire Rick Fisher and Before and After Home Improvement. My wife and I hired Rick Fisher and his company in the latter part of June 2018, to build a stamped concrete patio; a small composite deck; and a pergola with the electrical kit for the ceiling fan. The project finally began on August 7, 2018, and was completed around August 28, 2018. We paid Rick approximately $26,000 in 3 timely installments according to the contract. We exceeded our budget on this project because we were impressed with the pictures of Rick’s previous projects and his reviews. “Don’t believe the hype”. It all started with Rick not being able to obtain the county permit for the pergola due to his drawing which lacked specificity to the dimensions and materials used so the structure would be able to withstand strong winds. Rick advised me the permit office required him to hire an engineer which I would need to pay for him to subcontract to provide that information for his drawing to resubmit to the county permit office. Rick never mentioned this to us before we signed the contract, nor was it stipulated in the contract. Rick’s solution was pay for an engineer or don’t do the pergola. I took initiative to contact the permit office and speak with the manager to arrange a meeting with her and Rick. She was able to assist Rick and get the permit approved without the need for an engineer which would have been at my expense. During the course of this project, my wife and I spent entirely too much time, energy, and efforts addressing issues with Rick relative to his lack of responsiveness and doing the job he said he would. These issues were within his span of control and frankly he failed miserably. The materials are of a decent quality, which is why the pictures look great on the web, however; the customer service, commitment to doing the job right is a serious problem. Rick says he only does one job at a time and he will be on the job site everyday to ensure things are done to standard. This was simply not true. Rick has a lot of projects going on and he rarely came by our home. He was not responsive to my calls or text messages regarding his presence and multiple other issues that required communication. Rick told me the job was going fine because he saw the pictures of what was being done. I demanded that he come by my home to physically inspect the progress. He came by and some adjustments were required. Rick does not give you specific days or times when he will come by even when you are requesting a specific day or time. I had to send multiple text messages and calls to get him to do what he initially said he would do. The project was completed on August 28, 2018. On October 7, 2018, I contacted Rick regarding the rust on the staples holding down the electric cord on top of the pergola. Instead of utilizing galvanized staples or some material that does not rust as a result of inclement weather, his crew used regular staples to hold down the electric cord. Now I have rust running along the top of this expensive pergola that we paid Rick about $8,500 to build. The electrical kit was an additional $1,500 approximately. Rick has not come by my home to take care of this issue as of yet. We have a manufactures warranty on the material but nothing from Rick covering us on the workmanship of the project. On October 18, 2018, he sent someone allegedly from his crew to resolve the issue, however; the worker was not prepared to resolve the issue and was going to replace the staples with more of the same staples. Complete Nonsense! I advised Rick this was unacceptable. The deficiency would not take more than 2 hours to resolve, but Rick refuses to come out and take care of it. It’s such a small job, I cannot get another company to come out to do the repair because it’s not feasible. One reputable contractor said he cannot believe the company who did the work did not have the professional common courtesy to fix the problem. In addition to this, when Rick’s crew excavated the yard to lay the patio, they were supposed to leave a trench sufficient for water to flow into the storm drain. Now we have standing water in the yard when it rains. The yard had a trench before they began excavating and we had no issues with standing water. It’s going to cost me $1,000 to have this problem resolved. Perhaps it’s all in the name: Before and After Home Improvement. Beware, you will need repairs Before and After Home Improvement allegedly completes your project!"
Paul B on December 2018
Take your dreams to the Next Level! In business since 2009, 3 Jay's Next Level Landscaping & Home Design has been serving greater Fairfax, Prince William & surrounding counties with the finest in landscaping and home designs in the industry. We offer everything from lawn care maintenance & landscaping to building your dream home. Built using the highest quality commercial & custom grade materials, we offer free estimates on all of our work. For larger projects, we offer custom design planning, in which you will receive a set of building plans approved by the county. These blueprints will be accompanied by an accurate 3D visual representation of what your project will look like upon completion. Our friendly staff have a combined experience of over 50 years & customer service has always been our top priority. We will always respond quickly to your requests, our prices are reasonable & our work is consistently performed to the highest caliber. Take your dreams to the Next Level & call us today for your free estimate!
"Great! I have had my system for a number of years. Joe explained things that I never knew how to program and test the system. Great job."
Ralph V on April 2025
Take your dreams to the Next Level! In business since 2009, 3 Jay's Next Level Landscaping & Home Design has been serving greater Fairfax, Prince William & surrounding counties with the finest in landscaping and home designs in the industry. We offer everything from lawn care maintenance & landscaping to building your dream home. Built using the highest quality commercial & custom grade materials, we offer free estimates on all of our work. For larger projects, we offer custom design planning, in which you will receive a set of building plans approved by the county. These blueprints will be accompanied by an accurate 3D visual representation of what your project will look like upon completion. Our friendly staff have a combined experience of over 50 years & customer service has always been our top priority. We will always respond quickly to your requests, our prices are reasonable & our work is consistently performed to the highest caliber. Take your dreams to the Next Level & call us today for your free estimate!
"Great! I have had my system for a number of years. Joe explained things that I never knew how to program and test the system. Great job."
Ralph V on April 2025
We have 40 years of experience in the field, servicing and installing all types of residential, commercial, and industrial septic systems. Our gratification always comes from getting jobs approved and satisfying our customers with a fully functioning septic system. We are licensed and bonded and offer the highest quality work.
"Rick treated my home like it was his personal home. He was professional, responsive, and completed the repair faster than I thought he could. I highly recommend him"
Garry S on August 2021
We have 40 years of experience in the field, servicing and installing all types of residential, commercial, and industrial septic systems. Our gratification always comes from getting jobs approved and satisfying our customers with a fully functioning septic system. We are licensed and bonded and offer the highest quality work.
"Rick treated my home like it was his personal home. He was professional, responsive, and completed the repair faster than I thought he could. I highly recommend him"
Garry S on August 2021
Exceptional landscape design just for you! With Autumn's Horticultural Services, we pride ourselves in thoughtfully executing a beautiful landscape design fit for your perfect space. Whether enhancing the outside of your home or inside, we offer landscape and plant services to create a sanctuary inside and out to provide the sanctuary of your dreams. We focus on providing exceptional services and plant materials to make every job a home run! We invite you to contact us for all your landscape design and install needs! How We Got Started I chose to work in this industry because The work to transform the landscape or garden, is more than a one and done project, the results should last a lifetime, and even get better with time. . We describe our business as Rooted in the community Community Involvement We love to help Historic Towns in the area, adding plant interest in the storefront, meeting locals is always fun! How would you describe your aesthetic when it comes to landscape design? My aesthetic varies on the client, I'm open and ready for the creative juices to flow!
Exceptional landscape design just for you! With Autumn's Horticultural Services, we pride ourselves in thoughtfully executing a beautiful landscape design fit for your perfect space. Whether enhancing the outside of your home or inside, we offer landscape and plant services to create a sanctuary inside and out to provide the sanctuary of your dreams. We focus on providing exceptional services and plant materials to make every job a home run! We invite you to contact us for all your landscape design and install needs! How We Got Started I chose to work in this industry because The work to transform the landscape or garden, is more than a one and done project, the results should last a lifetime, and even get better with time. . We describe our business as Rooted in the community Community Involvement We love to help Historic Towns in the area, adding plant interest in the storefront, meeting locals is always fun! How would you describe your aesthetic when it comes to landscape design? My aesthetic varies on the client, I'm open and ready for the creative juices to flow!
Call or text us at (703) 906-9735 **ET General Contractor INC was formed to provide general contracting services in the commercial and residential industry. ET General Contractor INC is insured in the state of Virginia. Our employees are direct employees and we don’t subcontract any work. Our employees are trained individuals who are responsible and produce quality workmanship. In our 25 years of experience we've completed our jobs in a timely and professional manner. Here at ET General Contractor INC I, Julio, conduct weekly meetings to cover issues relating to job and personal safety. We practice open communication and team work with management and field personnel allowing growth and success. I would sincerely appreciate an opportunity to work with you on any of your projects.
"Julio and his team are some of the most qualified and hardworking people I have been around. We had a couple important projects in our backyard and crawl space. They were always on time, always responsive and did a phenomenal job for us."
Jordan W on December 2024
Call or text us at (703) 906-9735 **ET General Contractor INC was formed to provide general contracting services in the commercial and residential industry. ET General Contractor INC is insured in the state of Virginia. Our employees are direct employees and we don’t subcontract any work. Our employees are trained individuals who are responsible and produce quality workmanship. In our 25 years of experience we've completed our jobs in a timely and professional manner. Here at ET General Contractor INC I, Julio, conduct weekly meetings to cover issues relating to job and personal safety. We practice open communication and team work with management and field personnel allowing growth and success. I would sincerely appreciate an opportunity to work with you on any of your projects.
"Julio and his team are some of the most qualified and hardworking people I have been around. We had a couple important projects in our backyard and crawl space. They were always on time, always responsive and did a phenomenal job for us."
Jordan W on December 2024
Engineer structurals FAQs
You should bring in a structural engineer any time you’re adding or removing something that carries weight—think new construction, a major remodel, or moving a load‑bearing wall. Call one during a real‑estate deal, after storm damage, or when you spot cracks in the foundation, beams, or chimney. An engineer’s report confirms that the structure is sound and tells your contractor exactly what fixes—or reinforcements—are needed to keep the home safe long‑term.
Who you hire depends on the task. Hire an architect to shape the look and layout of your home. Call a structural engineer to verify that load‑bearing elements—walls, beams, foundation—can handle the plan or to diagnose structural issues. Bring in a home inspector for a broad health check during a sale, after a storm, or for an appraisal. Matching the pro to the job keeps costs down and problems in check.
During the visit, the engineer checks your foundation, framing, walls, roof, and insulation, then compares what they see to any existing plans. If the structure matches the specs, you get the all‑clear; if not, the engineer outlines the fixes. Their sign‑off is what lets the next phase of work move forward, so expect clear notes on what’s solid and what needs attention.
Civil engineering is the broad field that covers roads, bridges, and other infrastructure. Structural engineers focus on the loads and forces inside a building or bridge—foundations, beams, and walls—while mechanical engineers design and keep power systems running, from elevators and turbines to HVAC equipment. In short, civil handles the big picture, structural makes sure it stands up, and mechanical keeps everything moving.
Most structural engineers offer free quotes. They’ll look at your home’s size and the scope of work to decide whether a flat fee or hourly rate makes sense. Simple inspections are usually priced by square footage; bigger, more complex jobs require a site visit and a detailed written estimate. Getting that number up front lets you nail down a budget before any drawings or inspections begin.
The engineer reviews every load‑bearing part of the home—floors, foundation, walls, roof, and major beams—along with insulation and the soil around the structure. They also factor in local weather risks and nearby water sources. The goal is to confirm that the materials and construction can handle day‑to‑day loads and extreme events alike, and to flag any spots that need reinforcement.
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