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
With 70 years of experience, Great Falls Septic Service offers comprehensive commercial and residential septic services. From brand new installs, repairs and maintenance-preventative or emergency, you can count on us to take care of all things septic. Additionally, we offer roll off containers and perform lot clearing. Our team of skilled servicemen provide quality workmanship and excellent customer service to ensure your septic system is well-maintained and fully functional. If you're looking for a company that provides outstanding service and quality work at an affordable price, then look no further than Great Falls Septic Service. We will do everything possible to cater to our clients. Family owned & operated. Phone number(s) 540-545-7075 or 703-444-5600. Fax number 540-545-7077
"On time, friendly, effective."
David F on May 2023
With 70 years of experience, Great Falls Septic Service offers comprehensive commercial and residential septic services. From brand new installs, repairs and maintenance-preventative or emergency, you can count on us to take care of all things septic. Additionally, we offer roll off containers and perform lot clearing. Our team of skilled servicemen provide quality workmanship and excellent customer service to ensure your septic system is well-maintained and fully functional. If you're looking for a company that provides outstanding service and quality work at an affordable price, then look no further than Great Falls Septic Service. We will do everything possible to cater to our clients. Family owned & operated. Phone number(s) 540-545-7075 or 703-444-5600. Fax number 540-545-7077
"On time, friendly, effective."
David F on May 2023
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.
"In short, things went GREAT, and I can whole-heartedly recommend Thomas Custom Builders (TCB), which is a "design-build" firm. Here's how things went: Firstly, expect that they have a backlog, and it may take a while to get to your project - probably because their reputation proceeds them. It took nearly 9 months between when we started with them on scoping our our project to when we broke ground, however we ended up with a design that worked. Through that phase, we worked with TCB on what goals we wanted to achieve, and what our budget was, and they designed to achieve as much of our goals within our budget. During construction, TCB promised to have a foreman who spoke fluent English on-site every day, and they delivered on that. This stood in pretty stark contrast with some of my previous contracting experiences, where the project could languish without seeing anyone come to the site. With TCB, the project always moved forward - sometimes it moved rapidly, with multiple trades on-site - sometimes it moved moderately, with the foreman and a couple helpers - and sometimes it was just the foreman handling things himself - but it always moved. TCB also is the kind of company that won't nickle and dime you. If something small is missed in the project scope that is needed to really complete the project, they'll do it. Don't expect them to shell out thousands of dollars in that respect - that would be a change order (which I had one) - but at the end of the day, I very much got the impression that they really took pride in their work and wanted me to be happy with the end result, which I am. TCB estimated the job would take between 3 to 4.5 months, and they completed in 4 months. I had one change order to connect my concrete/flagstone walkway to my stairs, which we had missed in the scope and was too big of a cost for TCB to absorb ($2.5k), however that was the only overage, so all in all we stayed on-budget. Things that we got done in the project: - Bumped out front to add walk-in closet and much bigger master bath to master bedroom. - Reconfigured entryway with a foyer/mudroom and semi-open staircase to attic. - insulated attic. It's still unfinished, but much better for storage. - new roof w/ 30 year shingles - widened dining - family room entry to be open concept. - re-did fireplace wall with built-ins, stone tile, gas insert - new paint for most of first floor - refinished all hardwood. One thing that we did to help out is that we completely moved out of the first floor as well as most of the attic stuff into a POD. TCB will readily tell you that they aren't professional movers, so go ahead and hire a professional moving firm to do that for you to clear the way for TCB to do their work. We used 2 men and a truck and were very happy with them."
Jeffrey L on February 2019
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.
"In short, things went GREAT, and I can whole-heartedly recommend Thomas Custom Builders (TCB), which is a "design-build" firm. Here's how things went: Firstly, expect that they have a backlog, and it may take a while to get to your project - probably because their reputation proceeds them. It took nearly 9 months between when we started with them on scoping our our project to when we broke ground, however we ended up with a design that worked. Through that phase, we worked with TCB on what goals we wanted to achieve, and what our budget was, and they designed to achieve as much of our goals within our budget. During construction, TCB promised to have a foreman who spoke fluent English on-site every day, and they delivered on that. This stood in pretty stark contrast with some of my previous contracting experiences, where the project could languish without seeing anyone come to the site. With TCB, the project always moved forward - sometimes it moved rapidly, with multiple trades on-site - sometimes it moved moderately, with the foreman and a couple helpers - and sometimes it was just the foreman handling things himself - but it always moved. TCB also is the kind of company that won't nickle and dime you. If something small is missed in the project scope that is needed to really complete the project, they'll do it. Don't expect them to shell out thousands of dollars in that respect - that would be a change order (which I had one) - but at the end of the day, I very much got the impression that they really took pride in their work and wanted me to be happy with the end result, which I am. TCB estimated the job would take between 3 to 4.5 months, and they completed in 4 months. I had one change order to connect my concrete/flagstone walkway to my stairs, which we had missed in the scope and was too big of a cost for TCB to absorb ($2.5k), however that was the only overage, so all in all we stayed on-budget. Things that we got done in the project: - Bumped out front to add walk-in closet and much bigger master bath to master bedroom. - Reconfigured entryway with a foyer/mudroom and semi-open staircase to attic. - insulated attic. It's still unfinished, but much better for storage. - new roof w/ 30 year shingles - widened dining - family room entry to be open concept. - re-did fireplace wall with built-ins, stone tile, gas insert - new paint for most of first floor - refinished all hardwood. One thing that we did to help out is that we completely moved out of the first floor as well as most of the attic stuff into a POD. TCB will readily tell you that they aren't professional movers, so go ahead and hire a professional moving firm to do that for you to clear the way for TCB to do their work. We used 2 men and a truck and were very happy with them."
Jeffrey L on February 2019
Kitchen & Bath Shop is a complete kitchen and bath remodeling showroom with years of experience in quality residential kitchen remodeling and bathroom remodeling. Along with basement redo’s at low costs and other major home renovations. Our company provides the most comprehensive affordable kitchen and bathroom remodeling services. We are committed to giving our customers a wide range of modern, traditional, and classic kitchens and bathroom options and making the process of finding and buying your dream kitchen and bathroom as easy as possible.
Kitchen & Bath Shop is a complete kitchen and bath remodeling showroom with years of experience in quality residential kitchen remodeling and bathroom remodeling. Along with basement redo’s at low costs and other major home renovations. Our company provides the most comprehensive affordable kitchen and bathroom remodeling services. We are committed to giving our customers a wide range of modern, traditional, and classic kitchens and bathroom options and making the process of finding and buying your dream kitchen and bathroom as easy as possible.
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
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
We provide traditional architectural services to our clients. We are selective on what types of architect projects we work on because we want to give you personal service and individual attention. We service Prince William, Montgomery, Fairfax County, Washington D.C. Licenses: Architect #: 9211 EXP: 9/25/2024 Architect #: 0401008083 EXP: 8/31/2025 Architect #: ARC5449 EXP: 4/30/2026 Memberships and Affiliations: AIA, NCARB, and CBO, Licensed in VA, MD, DC and MI
"Good. My first time hiring an architect. So lots of edits required, like downscaling fancy lighting to cut costs, and every time I had an edit I had to then edit something else again! He had a creative solution to a problem. Was very available for communication"
Lisa A on June 2024
We provide traditional architectural services to our clients. We are selective on what types of architect projects we work on because we want to give you personal service and individual attention. We service Prince William, Montgomery, Fairfax County, Washington D.C. Licenses: Architect #: 9211 EXP: 9/25/2024 Architect #: 0401008083 EXP: 8/31/2025 Architect #: ARC5449 EXP: 4/30/2026 Memberships and Affiliations: AIA, NCARB, and CBO, Licensed in VA, MD, DC and MI
"Good. My first time hiring an architect. So lots of edits required, like downscaling fancy lighting to cut costs, and every time I had an edit I had to then edit something else again! He had a creative solution to a problem. Was very available for communication"
Lisa A on June 2024
My name is Justin LeBlanc, and I am the owner and operator of Adam Contracting. Adam Contracting considers customer satisfaction our highest priority, and we make sure that, as a client, you are satisfied not only with the affordability but the quality of our work. Adam Contracting is a fully licensed and insured company. Please feel free to contact us anytime for an estimate!
"My only regret is not hiring Adam Contracting sooner. From the beginning of the project, I was updated on the schedule and cost. All of the employees were professional, and skilled, and left my house clean after each task. If I had issues or noticed something that needed to be changed the owner addressed the concern immediately. I am very happy with the finished project!"
Nia W on November 2022
My name is Justin LeBlanc, and I am the owner and operator of Adam Contracting. Adam Contracting considers customer satisfaction our highest priority, and we make sure that, as a client, you are satisfied not only with the affordability but the quality of our work. Adam Contracting is a fully licensed and insured company. Please feel free to contact us anytime for an estimate!
"My only regret is not hiring Adam Contracting sooner. From the beginning of the project, I was updated on the schedule and cost. All of the employees were professional, and skilled, and left my house clean after each task. If I had issues or noticed something that needed to be changed the owner addressed the concern immediately. I am very happy with the finished project!"
Nia W on November 2022
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.