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Top-Rated Structural engineers in O'ahu - Updated Nov 2026

Aaron Shimizu
5.0(
10
)
Draftsperson/CADDArchitectArchitect - For Business

Serving O'ahu, HI and surrounding areas

Approved

In business since 2020

Free estimates

Small jobs welcome

"I got fined because a Rock Wall contractor messed me up by telling me a permit was not needed so I had to pay a big fine. A friend recommended Aaron Shimizu Architecture company who was quite knowledgeable. Aaron was quite easy to talk to and made me relax by explaining the process he was quite knowledgeable He explained the steps and started the process for the new permit very quickly and as we progressed his staff kept me in the loop. I became very relaxed because of his experience. I got my legal permit after the process was finished. If I have any problems again I will definitely call Aaron he is a smart man."
Response time2 days
Response rate89%
7 neighbors recently requested a quote
Avatar for APEX Drafting LLC
APEX Drafting LLC
3.9(
7
)
Draftsperson/CADDArchitect

Serving O'ahu, HI and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

We have a single mission: Complete Customer Satisfaction! We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience. \nYou will find us to be competitively priced with close attention to the details. \nOur reputation is based on service, safety, and quality, regardless of how large or small the job. \nWe look forward to building a lasting relationship and guarantee your satisfaction! \n

Plan set 1
257 neighbors recently requested a quote
DDG Hawaii
3.3(
15
)
Draftsperson/CADDArchitectArchitect - For Business

Serving O'ahu, HI and surrounding areas

Approved

In business since 2000

Free estimates

Small jobs welcome

"DiAmico Design was very efficient and expeditious in contract signing to plans development and completion of plans in timely manner. Michele new all the rules/regs of City and County of Honolulu, which made for easy progress to completion of panning and permitting process. I would highly recommend DiAmico Design services. Chester K."
Response time2 days
Response rate92%
16 neighbors recently requested a quote
Avatar for DSB Enterprises
DSB Enterprises
New to Angi
Draftsperson/CADD

Serving O'ahu, HI and surrounding areas

Approved

In business since 2007

Free estimates

Credit card accepted

With over 10 years of experience in the drafting industry, we are the experts you need to take care of your home or business. We handle everything from drafting design to permit service. We will treat your home as we would treat our own. Give DSB Enterprises a call today. We look forward to working with you!

Response time8 hrs
2 neighbors recently requested a quote
Avatar for Carlo Priska, AIA & Associates
Carlo Priska, AIA & Associates
2.1(
10
)
ArchitectArchitect - For BusinessDraftsperson/CADD

Serving O'ahu, HI and surrounding areas

Approved

In business since 1971

Free estimates

Offers commercial services

"Carlos was very professional when he came to do the site visit. We went over details over my small project. He submitted his proposal the next day. Only reason I didn t select him was his price was almost triple the amount of the other five proposals I received, for the same work. Now only time will tell if it was the correct decision, but based on how small my job is, I felt it wasn t worth the price proposed. I think his price is more for commercial projects. Good luck!"
Rear view
A New Residence
A New Residence
Commercial Project
Commercial Project

+13

Response time3 hrs
Recommended by75%of homeowners
Avatar for Toa and Kyle's Home Solutions
Toa and Kyle's Home Solutions
4.6(
78
)
ArchitectArchitect - For BusinessDraftsperson/CADD

Serving O'ahu, HI and surrounding areas

In business since 2014

Free estimates

Emergency services offered

"Kyle did an exceptional job. He completed the project quickly, professionally, and with extreme quality. We had a minor issue and he responded quickly and adjusted the build. I would highly recommend and would certainly hire this professional again."
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+52

Recommended by96%of homeowners
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Structural Engineering FAQs, answered by experts

A 4-inch-thick concrete slab can support around 4,000 pounds per square foot if a contractor reinforces the slab with rebar, while that same slab without reinforcements will support closer to 1,000 pounds. For the purposes of a patio, 4 inches in thickness without reinforcement should suffice unless you’re installing heavy kitchen equipment or a hot tub on it. In those cases, reinforcing your slab and sticking with 4 inches of thickness should provide plenty of strength.

The depth of any foundation style depends on your climate and how deep the frost line is, as building code requires that the footers of a foundation—which are built into a monolithic slab—sit at least a foot below the frost line. At the southern tip of Florida, for example, a monolithic slab foundation would only need to sit 12 inches under the soil at the widest parts. On some parts of the Canadian border, the frost line is 100 inches, which would mean a minimum of 112 inches, which is prohibitively deep for a monolithic slab.

According to the Earthquake Country Alliance—a public and private alliance in California that works to improve earthquake and tsunami readiness—reports that unreinforced masonry, such as stone, bricks, and hollow clay tiles, is more susceptible to earthquake damage. The mortar between bricks isn’t as stable as other building materials and methods.

Precast concrete can be reinforced with rebar, wire mesh, or other materials to improve its strength and add stability. Precast concrete for large construction projects is often pre-stressed as well for greater structural strength. Reinforced concrete is durable and strong, making it an ideal choice for many construction projects.

Generally, you can tell if a home is bolted to the foundation by checking the foundation for plates. If you see that your foundational plates connect to wood or bolts protruding from them, this means that you have a bolted foundation. However, it's always wise to bring a home inspector in to confirm if your foundation is secure.

The O'ahu, HI homeowners’ guide to structural engineering services

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