Best Civil, Structural and Environmental Engineers near Smithtown, NY
1 of these companies is based in Smithtown; the others serve Smithtown from towns including Huntington (9 mi), Melville (12 mi) and Hamilton Township, NJ (1 mi).
1 open 24/7 · 3 open weekends · 13 rated 4.5+ · 2 show a license
Data verified October 16, 2026
Scalice Land Surveying
“They returned my quote for the job, answered emails quickly, and got everything done before their deadline they gave me.”
Long Island Engineer
“His inspection was very detailed and thoughtful and he made sure to explain his finding and that you understood.”
Homeport Engineering
“I walked around with them during a home inspection and they pointed out a number of issues that would be easy to overlook, some of which were critical to the home value.”
Passarelli Engineering
“Garrett came to do an inspection shortly after contacting him, and was able to give me a detailed plan on how to remediate the issues my house had, while also giving me peace of mind that the house is structurally safe.”
Home Energy Solutions
“The customer service is top notch, and they are always quick to reply and fit us into their schedule.”
Listed for property owners in and around Smithtown, NY, these 15 companies do engineering work for properties. Listings show the disciplines each firm names on its own website, from structural to civil site work and environmental assessment, with ratings and quotes from public reviews.
Area overview: Smithtown, NY
The 15 companies on this page are rated from 4.1 to 5.0 across 377 reviews; 2 have 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise responsiveness (86%), professionalism (82%) and quality (64%). 1 is open around the clock; 3 are open on Saturdays and 1 on Sundays. 2 show a license on their websites; 1 lists staff certifications (ASHI) and 2 have a BBB rating of A or A+. 13 have ten or more years of experience, the longest 80 years. 1 offers emergency call-outs; 2 give free estimates and 1 is family- or locally-owned. We have a website on file for all 15 of the companies on this page; 13 publish a contact page and 11 list a public email. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Do any of these firms say they are licensed?
2 of the 15 listings for Smithtown show a license on their websites. Registration belongs to an individual, so match the name on the seal to the person doing your work, and verify it with the state board rather than trusting a badge on a homepage.
Barrett
“Greg Brouillet was very helpful, responsive and knowledgeable with the requirements necessary to sell off a parcel of my property.”
Pacifico Engineering
“Pacifico Engineering is my go to engineer for structural and sanitary design.”
South Bay Engineering Pllc
“He made some informed suggestions and was able to provide very quick service and he happens to be a very professional and knowledgeable gentlemen.”
H2M Architects + Engineers
“It's what you would expect from a professional Engineering firm.”
Kiro Engineering
“Mina was awesome, great service and very professional.”
Greentauk Engineering
“John was very easy to talk to and he explains everything to the point, where we had more understanding of the importance of the elevation certificate.”
N&P Engineering
“The best around and worth every dime!”
Tristate Planning Engineering & Land Surveying. P.C.
“Very professional and great people to work with, from a regular topographic survey to an Airport survey.”
Key Civil Engineering
“Great work and a pleasure to work with!”
Why these companies made our list
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