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    Verified structural engineering services reviews

Find Structural engineers in Mentone

James E. DeGroff, Consulting Engineer

28180 Geneva Lane
4.08(
6
)
Approved Pro

James E. DeGroff, Consulting Engineer

28180 Geneva Lane
4.08(
6
)
Approved Pro
Customers say: Terrific value
25 local quotes requested
57 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Do yourself a favor and find another engineer. James is a nice man but for the rate he charges, i would expect far better service and quality of work. Since day one, i had to continually remind him (more like nag him) to do the things he committed to do (i.e., send proposal, get measurements, send drawings, etc). And when he finally sent a draft of the final drawings (for what is a very simple project), I couldn't believe the poor quality and attention to detail. And with each subsequent draft, it seems he introduced more errors than he corrected. "

Ned J on September 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Do yourself a favor and find another engineer. James is a nice man but for the rate he charges, i would expect far better service and quality of work. Since day one, i had to continually remind him (more like nag him) to do the things he committed to do (i.e., send proposal, get measurements, send drawings, etc). And when he finally sent a draft of the final drawings (for what is a very simple project), I couldn't believe the poor quality and attention to detail. And with each subsequent draft, it seems he introduced more errors than he corrected. "

Ned J on September 2025


Calebs Imagination

1000 Simplicity
No reviews yet

Calebs Imagination

1000 Simplicity
No reviews yet
5 years of experience

Building or remodeling your dream home. Whatever your imagination envisions we can make it a reality. We have 25 years of experience with pulling permits, designing, drawing schematics/blueprints, earthwork, concrete, stucco, framing, roofing, Plumbing, electrical, HVAC, windows, drywall, insulation and more!

Building or remodeling your dream home. Whatever your imagination envisions we can make it a reality. We have 25 years of experience with pulling permits, designing, drawing schematics/blueprints, earthwork, concrete, stucco, framing, roofing, Plumbing, electrical, HVAC, windows, drywall, insulation and more!


Rehab Building Company, Inc.

No reviews yet

Rehab Building Company, Inc.

No reviews yet

Rehab Building Company, Inc. A License - Engineering B License - General Contractor C10 License - Electrical We are a growing company holding three licenses. We have done it all from residential, commercial to government work. As licensed contractor, we are in search of larger size projects using our expertise in engineering. Please contact us for all for major projects where you need seasoned expertise, quality workmanship and very professional contractors from start to finish. With over 80+ years in construction, we pride ourselves in the upmost quality, professionalism and expertise! Please call us for your next project.

Rehab Building Company, Inc. A License - Engineering B License - General Contractor C10 License - Electrical We are a growing company holding three licenses. We have done it all from residential, commercial to government work. As licensed contractor, we are in search of larger size projects using our expertise in engineering. Please contact us for all for major projects where you need seasoned expertise, quality workmanship and very professional contractors from start to finish. With over 80+ years in construction, we pride ourselves in the upmost quality, professionalism and expertise! Please call us for your next project.


Merco Earthmoving and Paving

No reviews yet

Merco Earthmoving and Paving

No reviews yet
6 years of experience

Merco Earthmoving and Paving is a small owner operated business that has been committed to providing customers with the very best in paving and construction. From driveways to backyards and anything in between, we can help to ensure that your property is the best year-round. Any job big or small, we do it all.

Merco Earthmoving and Paving is a small owner operated business that has been committed to providing customers with the very best in paving and construction. From driveways to backyards and anything in between, we can help to ensure that your property is the best year-round. Any job big or small, we do it all.


Quality Fiberglass Repair LLC

205 West 4th Street
No reviews yet

Quality Fiberglass Repair LLC

205 West 4th Street
No reviews yet
Free onsite estimate

At Quality Fiberglass we Offer Repair, Restoration, and Fabrication services on any RV, Boat, or Autombile along side many Home Improvement and Repair services. Home Improvement and Repair Services ~ Pool and Spa Repair and Resurfacing ~ Vinyl Pool Liner Instalation and Replacement ~ Pool / Water Slide Repair, Resurfacing, and Custom Fabrication ~ Custom Fountains, Fish Tanks, and Koi Ponds ~ Composit and Fiberglass Furniture, Sculpture, and Art Repair Custom Fabrication ~ Bathroom and Closet Remodels and Custom Fabrication We are a small family owned and operated business with three generations of trade experience and expertise. Our goal is to provide our community with exceptional products that have lasting value. We attain this goal by providing services, sourcing materials, and building products with Integrity, Excellence, and Creativity.

At Quality Fiberglass we Offer Repair, Restoration, and Fabrication services on any RV, Boat, or Autombile along side many Home Improvement and Repair services. Home Improvement and Repair Services ~ Pool and Spa Repair and Resurfacing ~ Vinyl Pool Liner Instalation and Replacement ~ Pool / Water Slide Repair, Resurfacing, and Custom Fabrication ~ Custom Fountains, Fish Tanks, and Koi Ponds ~ Composit and Fiberglass Furniture, Sculpture, and Art Repair Custom Fabrication ~ Bathroom and Closet Remodels and Custom Fabrication We are a small family owned and operated business with three generations of trade experience and expertise. Our goal is to provide our community with exceptional products that have lasting value. We attain this goal by providing services, sourcing materials, and building products with Integrity, Excellence, and Creativity.



S&R Design

5632 Van Nuys Blvd #235
No reviews yet

S&R Design

5632 Van Nuys Blvd #235
No reviews yet
9 years of experience

Residential and commercial design, engineering and permit processing for projects in Southern California. New construction / additions and remodels / ADU new and converted / single-family and multi-family / retaining walls and grading / planning department approvals / tenant improvement and change of use. Located in the heart of Van Nuys, project geography spanning from Oxnard to Joshua Tree, from Victorville to Mission Viejo, with other selected remote locations.

Residential and commercial design, engineering and permit processing for projects in Southern California. New construction / additions and remodels / ADU new and converted / single-family and multi-family / retaining walls and grading / planning department approvals / tenant improvement and change of use. Located in the heart of Van Nuys, project geography spanning from Oxnard to Joshua Tree, from Victorville to Mission Viejo, with other selected remote locations.


Shylock Enterprises

No reviews yet

Shylock Enterprises

No reviews yet

For the Hiring of the Services Iam capable of Doing all of any of the home remodeling or renovations, this as well as having many of the materials that will save you money. Iam familiar with the working tools and their use straight-edges, on the level and cost within due bounds all work will be right and exact.

For the Hiring of the Services Iam capable of Doing all of any of the home remodeling or renovations, this as well as having many of the materials that will save you money. Iam familiar with the working tools and their use straight-edges, on the level and cost within due bounds all work will be right and exact.


guilherme engineering

No reviews yet

guilherme engineering

No reviews yet
15 years of experience

we perform concrete work, structural and flat work. drive ways, curb and gutter, etc. also under ground utilities such as water, sewer, and gas. we are a small owner operated company and take pride in every job.

we perform concrete work, structural and flat work. drive ways, curb and gutter, etc. also under ground utilities such as water, sewer, and gas. we are a small owner operated company and take pride in every job.


T & B Engineering, Inc.

No reviews yet

T & B Engineering, Inc.

No reviews yet

T & B Engineering, Inc. is a full-service Structural Engineering, Design and Consulting Firm located in Riverside, California, with a combined professional experience that exceeds 40 years. Our firm consists of highly qualified and experienced professionals whose ultimate goal is to provide efficient and practical solutions for all types of structures, regardless of the scale or complexity of the design. Our firm fully recognizes the importance of, and is dedicated to, providing quality services that focus on a complete awareness of client needs and priorities. We are an owner operated company which has been in business for 14 years. Although the Owner of the company has been in this line of business for 30 years until he decided to open up his own company.

T & B Engineering, Inc. is a full-service Structural Engineering, Design and Consulting Firm located in Riverside, California, with a combined professional experience that exceeds 40 years. Our firm consists of highly qualified and experienced professionals whose ultimate goal is to provide efficient and practical solutions for all types of structures, regardless of the scale or complexity of the design. Our firm fully recognizes the importance of, and is dedicated to, providing quality services that focus on a complete awareness of client needs and priorities. We are an owner operated company which has been in business for 14 years. Although the Owner of the company has been in this line of business for 30 years until he decided to open up his own company.

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Structural Engineering questions, answered by experts

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.

A structural engineer’s report includes a professional assessment of a property’s foundation condition, structural elements like roof trusses and floor joists, and the skeleton of the home, including studs, beams, and rafters. It will also usually include an assessment of drainage on the property and any potential issues that could arise from environmental conditions, like extreme weather in the area and even tree placement.

Yes, a one-story house can have a load-bearing wall. The load-bearing walls in a single-story home are usually the exterior walls. If the house has a basement with exposed walls, the arrangement of the beams can help indicate what walls are load-bearing.

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.

It's safe to assume that all exterior walls are load-bearing, or at least have load-bearing characteristics. Some older homes feature porches or bump-outs that don't rest on the home's foundation. However, they still must carry the weight of the roof section they support. Walls containing floor-to-ceiling glass or other non-structural elements must use post and beam configurations to meet load-bearing criteria.

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The Mentone, CA homeowners’ guide to structural engineering services

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