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Engineer structural pros in Manassas

Kamran Ohi, PE
4020 Annandale Road
4.73(
130
)
Approved Pro
Kamran Ohi, PE
4020 Annandale Road
4.73(
130
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
49 years of experience

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


Avatar for Freeland Engineering, P.C.
Freeland Engineering, P.C.
10814 Courthouse Road
4.80(
62
)
Approved Pro
Freeland Engineering, P.C.
10814 Courthouse Road
4.80(
62
)
Approved Pro
Customers say: Quality work
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
20 years of experience

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


Avatar for Yard By Yard Makeovers LLC
Yard By Yard Makeovers LLC
7304 Carroll Ave
4.78(
95
)
Approved Pro
Yard By Yard Makeovers LLC
7304 Carroll Ave
4.78(
95
)
Approved Pro
Customers say: Quality work
178 local quotes requested
27 years of experience

Brian David Mahan, Master Gardener, and his expert crew have been helping homeowners in Silver Spring and Takoma Park, Maryland since 1993. We can reshape and beautify neglected yards, or any yards. Our creative expertise can provide you with a basic plan compatible with your needs and budget

"Excellent workers that cleared a thick growth of bamboo from yard."

Amaris J on February 2023

Brian David Mahan, Master Gardener, and his expert crew have been helping homeowners in Silver Spring and Takoma Park, Maryland since 1993. We can reshape and beautify neglected yards, or any yards. Our creative expertise can provide you with a basic plan compatible with your needs and budget

"Excellent workers that cleared a thick growth of bamboo from yard."

Amaris J on February 2023


Avatar for Horizon Landscaping Designs LLC
Horizon Landscaping Designs LLC
Unknown
4.86(
108
)
Approved Pro
Horizon Landscaping Designs LLC
Unknown
4.86(
108
)
Approved Pro
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
946 local quotes requested

Outdoor Designs it Includes: MASONRY AND HARDSCAPE Drainage Solutions, Patios, retaining walls, walkways, fireplaces, firepit, fences, driveways, columns, ponds, mulch, etc. We have general liability insurance License Maryland ( MHIC No. 133815 ) License Virginia Class A VA 2705189468 Free Estimate and Designs

"Excellently"

Dale S on December 2024

Outdoor Designs it Includes: MASONRY AND HARDSCAPE Drainage Solutions, Patios, retaining walls, walkways, fireplaces, firepit, fences, driveways, columns, ponds, mulch, etc. We have general liability insurance License Maryland ( MHIC No. 133815 ) License Virginia Class A VA 2705189468 Free Estimate and Designs

"Excellently"

Dale S on December 2024


Avatar for E T General Contractor INC
E T General Contractor INC
15030 Owls Nest Road
4.48(
442
)
Approved Pro
E T General Contractor INC
15030 Owls Nest Road
4.48(
442
)
Approved Pro
Customers say: Super punctual
2022 local quotes requested
27 years of experience

Call or text us at (703) 906-9735 or +1 (571) 662-9675 ** 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. We have a Class A Contracting License. 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. We do tree-work, patios, driveways, interior/exterior renovations, grading, roofing, deck building, window installation, retaining walls, drainage systems, we do it all.

"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 or +1 (571) 662-9675 ** 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. We have a Class A Contracting License. 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. We do tree-work, patios, driveways, interior/exterior renovations, grading, roofing, deck building, window installation, retaining walls, drainage systems, we do it all.

"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


Avatar for SABINES MSR CONSTRUCTION LLC
SABINES MSR CONSTRUCTION LLC
5453 Sheffield Court
5.00(
1
)
Approved Pro
SABINES MSR CONSTRUCTION LLC
5453 Sheffield Court
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
5 years of experience

This Is MSR CONSTRUCTION LLC and we known for interior and exterior framing, drywall, sheathing , acoustic, drywall ceilings. We are an upon coming construction business that’s looking to put our name out there for the great work we can offer.

"They did really good clean & professional Job I personally recommend SABINES CONSTRUCTION by the quality & prices"

Jose C on April 2025

This Is MSR CONSTRUCTION LLC and we known for interior and exterior framing, drywall, sheathing , acoustic, drywall ceilings. We are an upon coming construction business that’s looking to put our name out there for the great work we can offer.

"They did really good clean & professional Job I personally recommend SABINES CONSTRUCTION by the quality & prices"

Jose C on April 2025


Avatar for Recinos Landscape and Hardscape
Recinos Landscape and Hardscape
5.00(
7
)
Approved Pro
Recinos Landscape and Hardscape
5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1204 local quotes requested

Landscaping, hardscaping and pavers services available. Give us a call or click to request a quote today!

"quick work, great look! even gave me a discount..."

Nevin J on May 2025

Landscaping, hardscaping and pavers services available. Give us a call or click to request a quote today!

"quick work, great look! even gave me a discount..."

Nevin J on May 2025


Avatar for Thomas Custom Builders Inc
Thomas Custom Builders Inc
9058 Euclid Ave
4.74(
94
)
Approved Pro
Thomas Custom Builders Inc
9058 Euclid Ave
4.74(
94
)
Approved Pro
Customers say: Quality work
464 local quotes requested
21 years of experience

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


Avatar for Alex Landscape
Alex Landscape
5.00(
4
)
Approved Pro
Alex Landscape
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
702 local quotes requested

20+ years of experience! Alex Landscape specializes in creating beautiful and functional outdoor spaces tailored to meet your needs. Our expert team provides a full range of landscaping and hardscaping services, including custom patio installations, walkways, retaining walls, outdoor kitchens, fire pits, and lush greenery designs. Whether you’re looking to enhance curb appeal or transform your backyard into an outdoor oasis, we deliver quality craftsmanship and personalized solutions that exceed expectations. Trust us to bring your vision to life, blending aesthetics with durability for outdoor spaces you'll love for years to come.

"Very professional, excellent work."

Nancy C on April 2025

20+ years of experience! Alex Landscape specializes in creating beautiful and functional outdoor spaces tailored to meet your needs. Our expert team provides a full range of landscaping and hardscaping services, including custom patio installations, walkways, retaining walls, outdoor kitchens, fire pits, and lush greenery designs. Whether you’re looking to enhance curb appeal or transform your backyard into an outdoor oasis, we deliver quality craftsmanship and personalized solutions that exceed expectations. Trust us to bring your vision to life, blending aesthetics with durability for outdoor spaces you'll love for years to come.

"Very professional, excellent work."

Nancy C on April 2025


Avatar for Marks-Woods Construction Services, LLC
Marks-Woods Construction Services, LLC
205 S Union St
4.89(
161
)
Approved Pro
Marks-Woods Construction Services, LLC
205 S Union St
4.89(
161
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
1290 local quotes requested

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

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FAQs for engineer structural projects in Manassas, VA

You should replace floor joists as soon as you see clear signs of structural trouble—sagging floors, wide wall cracks, uneven door frames, wet or rotting wood, persistent squeaks, or windows that no longer latch. Tilted or sinking supports in the crawl space are another red flag. If you notice any of these signs, call a pro right away to keep your home’s structure safe.

If the joists are exposed from below, a pro can swap them out without touching the finished floor above. In an unfinished basement or crawl space, you’ll often see the joists and can easily reach them. When insulation, subflooring, or finished flooring blocks access, the crew must remove these materials before repairs can begin.

Sistering allows a pro to reinforce a cracked or undersized joist without tearing up the entire floor. The contractor slowly raises the frame, then fastens a new joist snugly against the damaged one to share the load. When done correctly, sistering restores full structural strength and keeps the floor level without the cost of a complete replacement.

Floor joists installed correctly in a stable environment can last for 100 years or more, often outlasting the house itself. However, termite damage, moisture, leaks, and other problems can significantly reduce a floor's lifespan. For instance, if the floor is exposed to consistent moisture, you'll likely need to replace the joists every 20 to 30 years.

Homeowners' insurance covers floor joist damage resulting from sudden and accidental events, such as fire, windstorm, or water damage from a burst pipe. It will not cover repairs resulting from gradual deterioration, poor maintenance, or termite infestations. Review your insurance policy and consult your provider to verify the conditions that guarantee full coverage. Doing so ensures you are fully aware of your responsibilities and can plan your repair work with complete confidence.

Floor joists are essential structural components that provide a stable foundation for your home. They directly transfer the weight of floors, furniture, and occupants to the foundation, ensuring stability and a safe living environment. Without these robust beams, the structure would face compromised load distribution, leading to potential safety hazards and costly repairs. Proper installation and maintenance are crucial for long-term durability and safety.

The Manassas, VA homeowners’ guide to engineer structurals
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