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Find Engineer structural pros in Washington

Kamran Ohi P E
4.8(
177
)

Serving Washington, DC and surrounding areas

Approved

In business since 1978

Emergency services offered

Warranties offered

"Mr. Ohi came to our home to inspect the foundation and support walls prior to us doing home renovation work. He did a thorough visual inspection and level measurements and located some small issues, but, thankfully, recommended that no foundation work be done. Mr. Ohi was pleasant to be with and knowledgeable about residential support structures."
2 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for OGV Structural Engineering, LLC
OGV Structural Engineering, LLC
5.0(
30
)

Serving Washington, DC and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Emergency services offered

Small jobs welcome

"I had a great experience working with Omid Gharavi of OGV Structural Engineering for structural engineering permit services for my home in Baltimore. He was knowledgeable, professional, and easy to work with. The drawings he prepared and stamped, along with the engineering letter, were approved by the county without issue, allowing me to move forward with my home project. I truly appreciate his expertise and would highly recommend his services."
Response time1 day
11 neighbors recently requested a quote
Recommended by35%of homeowners
Avatar for A & A Structures LLC
A & A Structures LLC
5.0(
14
)

Serving Washington, DC and surrounding areas

Approved

In business since 2015

Emergency services offered

Small jobs welcome

"I had a great experience working with A & A Structures LLC for the structural engineering work on my home renovation in Bethesda. They were easy to work with, extremely fast, and delivered permit-ready documents that were clearly tailored for Montgomery County DPS—right down to the correct file naming conventions, which matters more than people realize. When the county requested minor revisions, A&A responded immediately, made the updates without hesitation, and even worked directly with my developer to clarify requirements. All of this was handled under the original fee, which I felt was an excellent value. Professional, responsive, and clearly experienced with Montgomery County’s approval process—I would absolutely recommend them and would use them again without hesitation."
Response time4 hrs
Response rate95%
8 neighbors recently requested a quote
Avatar for Structurist Consulting Engineers
Structurist Consulting Engineers
4.7(
22
)

Serving Washington, DC and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Very responsive and professional. Arrived on time and completed the structural examination while explaining the issues that they discovered."
Stair and foundations
Deck Plan
Segmented Retaining wall with Geogrids
Custom Build home
Response time4 hrs
6 neighbors recently requested a quote
Recommended by100%of homeowners
Double-D Consulting Engineers
4.7(
18
)

Serving Washington, DC and surrounding areas

Approved

In business since 2017

Customers say: Quick response

"We hired Doug to check out some walls we wanted to remove but weren't sure whether they were load-bearing. He came by, took a look, opened up the wall in a few places, and had the signed and stamped engineer letter to us very shortly after that. Professional, responsive, and friendly service, we would use again."
Response time7 hrs
Response rate92%
1 neighbors recently requested a quote
Avatar for William Siegel
William Siegel
5.0(
2
)

Serving Washington, DC and surrounding areas

Approved

Free estimates

Small jobs welcome

Offers commercial services

I am a licensed Professional Engineer providing structural engineering services for residential and small commercial projects. I work with homeowners, contractors, and design professionals to help move projects through the permit process by providing structural calculations, drawings, evaluations, and engineering letters as needed.\n\nIn-person structural inspections are available in Maryland, DC, and Northern Virginia. Remote structural consulting is available in Delaware and North Carolina.\n\nTypical projects include load-bearing wall removal, beam and header sizing, additions, decks, foundation concerns, and framing evaluations. My goal is to provide practical, code-compliant structural solutions that are clear, efficient, and tailored to the project.

Load Path Section
Framing Plan
Framing Plan
Details
Foundation Plan

+3

17 neighbors recently requested a quote
Rock-River Engineering
4.6(
5
)

Serving Washington, DC and surrounding areas

In business since 2004

Emergency services offered

Credit card accepted

"

David was on time and very professional. He spent an appropriate amount of time evaluating the 2 areas we had requested. He documented the inspection w/ photos, measurements, and sketches. He provided a verbal preliminary report and is to provide a written final report w/ specifications for the mods we are proposing. (Removing a wall upstairs and a post downstairs.) We were happy to hear that our mods were going to be less complicated than originally thought and consequently less expensive. We have the peace of mind that the proposed changes are structurally sound and will be done correctly.


"
Recommended by100%of homeowners
Avatar for Arya Structures, LLC
Arya Structures, LLC
4.6(
23
)

Serving Washington, DC and surrounding areas

In business since 2020

Emergency services offered

Small jobs welcome

"I met with Arash of Arya Structures on the first day I called. He is extremely knowledgeable and I am so glad I called him. He explained the cause of new cracks showing up in the ceiling of my 20 year old addition, what needs to be done, and he recommended three companies who could perform the structural work needed. Iâ ve never used a structural engineer before. This needed more than cosmetic repair of cracks!"
Arya Structures, LLC
Arya Structures, LLC
Response time8 hrs
Response rate94%
Recommended by95%of homeowners
Bethlehem Engineering Consulting LLC
4.7(
18
)

Serving Washington, DC and surrounding areas

In business since 2022

Free estimates

Small jobs welcome

"Theodrose Kifle was an expert and professional in every sense. He provided knowledgeable feedback. He provided a quick turnaround time with the report and had great customer service. I would recommend Theodrose Kifle and his company to anyone who's looking for an exceptional expert at a fair price!"
Response time5 hrs
Response rate97%
Recommended by93%of homeowners
Avatar for Ayah Structures
Ayah Structures
5.0(
3
)

Serving Washington, DC and surrounding areas

In business since 2014

Free estimates

""I had a great experience with Ayah structural engineering . They were very responsive and professional from start to finish. They were able to quickly come out to my project, sign and seal the necessary documents, in order for me to get the permit I needed to complete my project on time. I highly recommend Ayah structural engineering for anyone looking for a reliable and efficient company.""
Additional Photos
Additional Photos
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Additional Photos
Additional Photos

+16

Recommended by66%of homeowners
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FAQs for engineer structural projects in Washington, DC

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 Washington, DC homeowners’ guide to engineer structurals

From average costs to expert advice, get all the answers you need to get your job done.