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Top-Rated Structural engineers in Mendon - Updated Nov 2026

Bob Dennis - Structural Engineer
4.4(
48
)
Engineer - Structural

Serving Mendon, MA and surrounding areas

Approved

In business since 1960

Free estimates

Customers say: Quality work

"Was having a potential home inspected for structural integrity. Spoke to Bob on the phone a few times. Since the home’s basement primarily consisted of a giant crawl space, I was told Don would do the job. Ultimately, the day before the scheduled inspection, I couldn’t get ahold of Don. Bob said Don was “feeling sick,” so the job was off. Frustrating, but a blessing in disguise because we ended up going with Colonial Restorations (the home was built in the 1800s). Colonial Restorations, LLC is the “go-to” for older home inspections and repairs. Tom was amazing (his son Brad is soon to take over the business)! They were both prompt, professional, and thorough. Very pleased with their work and thorough report/estimate. Colonial Restorations, LLC PO Box 868 Fiskdale, MA 01518 508-735-9900"
Install Steel Beam
footing hole
Termite damage
Structural Repair
8 neighbors recently requested a quote
Recommended by92%of homeowners
Taddonio Engineering, LLC
4.8(
347
)
Engineer - Structural

Serving Mendon, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Small jobs welcome

Credit card accepted

"In renovating our beach cottage in Warwick, RI we found the roof needed structural work. Building inspector required a structural engineered plan. Adam was easy to communicate with. He was timely with his plan and follow up inspection. He was also available by text and phone for questions during the project. He was great to work with!"
Response time1 day
Response rate86%
365 neighbors recently requested a quote
Avatar for M. Kinne Designs, LLC
M. Kinne Designs, LLC
5.0(
26
)
Draftsperson/CADD

Serving Mendon, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Small jobs welcome

"We needed an architectural drawing quickly to be submitted to a Board of Directors meeting. Mike did a great job, & he did it quickly & efficiently. Mike Kinne is highly recommended. He is the best!"
Pavilion with Retaining Wall
Measurements
Realistic vs. Concept
Lighting Concept
Ground Level

+12

Response time11 hrs
Response rate95%
15 neighbors recently requested a quote
M. Kinne Designs, LLC
5.0(
26
)
Draftsperson/CADD

Serving Mendon, MA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

M. Kinne Designs L.L.C. \nWe uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. We also accept PayPal !

Brick Wall Bar Concept
Brick Wall Bar Concept
Garage Addition
Garage Addition
Garage Addition

+7

1 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for CLASSICAL HOMES LLC
CLASSICAL HOMES LLC
4.4(
7
)
ArchitectArchitect - For Business

Serving Mendon, MA and surrounding areas

Approved

In business since 1989

Free estimates

Warranties offered

"Every project we have done with Classical Homes has been an excellent experience. The design aspects have been substantial, and have been executed by the architect with attention paid both to the aesthetics and to the functionality of the space. Time was taken to listen to our input, and to incorporate our thoughts into the final design when appropriate. The builder supervisor likewise oversaw the work of his sub contractors with care and concern, and proceeded in an efficient and orderly manner. Costs were outlined in advance, and contingencies provided for. Both of these professionals at Classical Homes were committed to the highest possible standards. We would have no hesitancy in using use them again should opportunities arise."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+38

Response time1 day
Recommended by100%of homeowners
Avatar for Evolution Drafting
Evolution Drafting
3.7(
127
)
Draftsperson/CADDArchitectArchitect - For Business

Serving Mendon, MA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"I am having a full master bath and kitchen remodel done with new layouts in both rooms and knocking out a wall. Evolution worked with me to quickly get a drawing done of the new layouts so that the contractor could get started on the project. They made sure to include me in the process so that the design would be done exactly as my wife and I envisioned. They communicated effectively throughout the process and were always courteous and professional. I recommend them to anyone with drafting needs."
Zeal Floor Plan
Charcoal
Palm Floor Plan
Charcoal Floor 2
Charcoal Floor 1

+23

Response time1 day
Response rate100%
66 neighbors recently requested a quote
Avatar for Szymanski Architect LLC
Szymanski Architect LLC
5.0(
6
)
ArchitectDraftsperson/CADD

Serving Mendon, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Offers commercial services

"We had an exceptional experience working with Michal on our house extension project. From the very beginning, he demonstrated an outstanding ability to translate our vision into a functional, beautiful design that seamlessly blends with the existing structure. His attention to detail, creativity, and deep understanding of both aesthetics and practicality made the entire process smooth and enjoyable. What truly stood out was his communication and responsiveness—he was always available to answer questions, provide updates, and offer thoughtful suggestions that improved the overall outcome. He collaborated effectively with our sub-contractors, engineer and interior designer and ensured that every stage of the project stayed on track, on budget, and in line with local regulations. The final result has exceeded our expectations. The new space feels light-filled, spacious, and perfectly suited to our family's needs. We receive compliments on it from many people! I wouldn't hesitate to rec"
Response time1 day
1 neighbors recently requested a quote
Avatar for Guzman Architects, LLC
Guzman Architects, LLC
5.0(
6
)
Architect

Serving Mendon, MA and surrounding areas

Approved

In business since 2001

Free estimates

Offers commercial services

"I hired Jose to design and draw our kitchen remodel. He used his experience, knowledge, and creativity to come up with a great design for an old house. He was available when questions came up and changes were needed. He was with us for the entire project was complete and inspections complete."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+33

16 neighbors recently requested a quote
Recommended by33%of homeowners
Avatar for Monadnock Design & Drafting
Monadnock Design & Drafting
4.4(
7
)
Draftsperson/CADD

Serving Mendon, MA and surrounding areas

Approved

In business since 2000

Free estimates

Small jobs welcome

"Dennis did an awesome job drawing up a basement in-law apartment for me. Iâ m a GC and will definitely be using him in the future. He was very responsive and gets the job done quickly."
Building Section
Structural Sections & Details
Stair Detail
Response time2 days
8 neighbors recently requested a quote
Recommended by83%of homeowners
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Structural Engineering FAQs, answered by experts

The standard thickness for an LVL beam is between 1.75 inches and 7 inches. However, you can order LVL beams in non-standard sizes as well. When you work with a contractor, they can source beams that are the appropriate size for your project for you after assessing your blueprints.

Yes, you can put a doorway in a structural wall; in fact, most exterior doors are set into structural walls. The project is a little more challenging than installing a door in a non-load-bearing wall because you need a structural engineer to assess the wall and make sure it’s safe to create a wall opening. Your engineer’s report will include instructions for your contractor on how and where to install additional supports, like steel headers above the door, to distribute the weight above to the wall on either side of the door.

Dormers must be able to bear the load of their own construction and the added window. The style of the dormer, however, will determine where the weight loads onto your home's structure. A gable dormer bears the weight on the side walls whereas a shed dormer bears it on the front walls.

The costs depend on the type of wood, labor, roofing material, permits, and whether additional storage or enclosed walls are included.

The average cost to hire a structural engineer is about $550, with prices generally ranging from $200 to $1,500. Structural engineers may charge a flat rate, by the project, by square footage, or an hourly rate, which is typically between $100 and $250. Many jobs, such as inspections and structural calculations, are billed at a flat rate, which often falls between $300 and $800. The final cost depends on several factors, including the project's type, scope, size, complexity, ease of access for inspection, and your geographic location.

The Mendon, MA homeowners’ guide to structural engineering services

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