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TRUSTED BY LAGUNITAS-FOREST KNOLLS, CA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon15
    Verified structural engineering services reviews

Find Structural engineers in Lagunitas-Forest Knolls

Avatar for Groundworks

Groundworks

2333 Courage Dr Ste C
4.33(
12
)
Approved Pro

Groundworks

2333 Courage Dr Ste C
4.33(
12
)
Approved Pro
Customers say: Quality work
59 local quotes requested
20 years of experience

Groundworks, formerly Bay Area Underpinning, specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento and San Jose areas. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation. Schedule your FREE inspection today! 1116054

"We hired Groundworks CA (fka Bay Area Underpinning) for what we understood was a full foundation repair. We paid $42K. They only worked on the rear and never informed us that the front wasn’t included. Months later, while selling our home, a third-party engineer found $189K in unaddressed issues at the front. We were blindsided, lost our buyer, and suffered major financial and emotional stress. Groundworks later admitted they hadn’t measured the front. Their rushed “final inspection” months later felt reactive, not professional. When asked for a partial refund, they refused. We feel misled and abandoned. Avoid."

Dominick M on June 2025

Groundworks, formerly Bay Area Underpinning, specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento and San Jose areas. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation. Schedule your FREE inspection today! 1116054

"We hired Groundworks CA (fka Bay Area Underpinning) for what we understood was a full foundation repair. We paid $42K. They only worked on the rear and never informed us that the front wasn’t included. Months later, while selling our home, a third-party engineer found $189K in unaddressed issues at the front. We were blindsided, lost our buyer, and suffered major financial and emotional stress. Groundworks later admitted they hadn’t measured the front. Their rushed “final inspection” months later felt reactive, not professional. When asked for a partial refund, they refused. We feel misled and abandoned. Avoid."

Dominick M on June 2025


Avatar for Drainage Pros

Drainage Pros

1456 SOS Dr
4.21(
19
)
Approved Pro

Drainage Pros

1456 SOS Dr
4.21(
19
)
Approved Pro
Customers say: Quality work
37 local quotes requested
43 years of experience

For over 33 years, Drainage Pros has successfully eliminated drainage and standing water problems for residential and commercial clients in the greater San Francisco Bay Area. At Drainage Pros, we specialize in providing each of our clients with reliable cost effective, permanent drainage solutions. Drainage Pros is the Bay Area leader in installing drainage systems with guaranteed and predictable results. Because of our ability to eliminate standing water problems, we are the first and only company in the Bay Area that offers you in writing a "5 Year No Standing Water Guarantee!" This unique guarantee of ours is unequaled in the industry. We have the skills that many have come to trust for all their Bay Area drainage needs. Our expert team is well trained and detail oriented while addressing the causes of your drainage water problems. You can rely on us! We will handle any and all standing water problems you are experiencing. Our team is committed to providing you with personalized service, the utmost care and our complete dedication to all of your project needs. At Drainage Pros, we understand that providing drainage solutions is a specialized discipline requiring a specific skill-set and training. So, whether you need a French drain, a sump pump, or a surface drainage system, Drainage Pros are the professionals of choice to rely upon every time to get your job done right! Drainage Pros, Results Guaranteed!

"The entire project took 9 days and involved a crew that was exceptional in every way. From Terrie to Tom, Rich (the owner), Alberto (the project manager), Eusebio (Alberto's right-hand man), and the entire team--they were the most respectful, diligent, patient, and fexible crew I've ever worked with. The quality of their work was outstanding, and they took great care in respecting our property while delivering an excellent solution. From a value standpoint, their price represented the best value proposition. Given the decades of experience doing ONLY this, they are literally the only game in town in my opinion. I highly recommend this team. They genuinely care about their work and provide a top-notch service."

Richard L on October 2024

For over 33 years, Drainage Pros has successfully eliminated drainage and standing water problems for residential and commercial clients in the greater San Francisco Bay Area. At Drainage Pros, we specialize in providing each of our clients with reliable cost effective, permanent drainage solutions. Drainage Pros is the Bay Area leader in installing drainage systems with guaranteed and predictable results. Because of our ability to eliminate standing water problems, we are the first and only company in the Bay Area that offers you in writing a "5 Year No Standing Water Guarantee!" This unique guarantee of ours is unequaled in the industry. We have the skills that many have come to trust for all their Bay Area drainage needs. Our expert team is well trained and detail oriented while addressing the causes of your drainage water problems. You can rely on us! We will handle any and all standing water problems you are experiencing. Our team is committed to providing you with personalized service, the utmost care and our complete dedication to all of your project needs. At Drainage Pros, we understand that providing drainage solutions is a specialized discipline requiring a specific skill-set and training. So, whether you need a French drain, a sump pump, or a surface drainage system, Drainage Pros are the professionals of choice to rely upon every time to get your job done right! Drainage Pros, Results Guaranteed!

"The entire project took 9 days and involved a crew that was exceptional in every way. From Terrie to Tom, Rich (the owner), Alberto (the project manager), Eusebio (Alberto's right-hand man), and the entire team--they were the most respectful, diligent, patient, and fexible crew I've ever worked with. The quality of their work was outstanding, and they took great care in respecting our property while delivering an excellent solution. From a value standpoint, their price represented the best value proposition. Given the decades of experience doing ONLY this, they are literally the only game in town in my opinion. I highly recommend this team. They genuinely care about their work and provide a top-notch service."

Richard L on October 2024


Avatar for ProStruct Engineering, Inc.

ProStruct Engineering, Inc.

450 Folsom Street,
5.00(
1
)
Approved Pro

ProStruct Engineering, Inc.

450 Folsom Street,
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 local quotes requested

ProStruct Engineering offers professional structural engineering services for residential building permits at reasonable prices. Our licensed and insured engineers have over 35 years of experience with 2,000+ completed projects, including new homes, additions, remodels, ADUs, retaining walls, load-bearing walls, seismic retrofits, foundation design, outdoor living spaces, and more. Our core values of integrity, responsibility, reliability, and ethics ensure affordable and high-quality services. We aim to make the home-building experience of California homeowners as stress-free as possible by delivering compliant and high-quality structural plans. We are committed to being cost-effective, with quick delivery in 2-3 weeks for most projects.

"Prompt customer service and delivery. Worked with a very knowledgeable and experienced structural engineer."

Karishma S on August 2023

ProStruct Engineering offers professional structural engineering services for residential building permits at reasonable prices. Our licensed and insured engineers have over 35 years of experience with 2,000+ completed projects, including new homes, additions, remodels, ADUs, retaining walls, load-bearing walls, seismic retrofits, foundation design, outdoor living spaces, and more. Our core values of integrity, responsibility, reliability, and ethics ensure affordable and high-quality services. We aim to make the home-building experience of California homeowners as stress-free as possible by delivering compliant and high-quality structural plans. We are committed to being cost-effective, with quick delivery in 2-3 weeks for most projects.

"Prompt customer service and delivery. Worked with a very knowledgeable and experienced structural engineer."

Karishma S on August 2023


Earthquake and Structures, Inc.

6355 Telegraph Avenue, Suite 101
4.68(
38
)
Approved Pro

Earthquake and Structures, Inc.

6355 Telegraph Avenue, Suite 101
4.68(
38
)
Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
35 local quotes requested

Earthquake and Structures, Inc., is one of California's finest engineering corporations! Earthquakes and Structures, Inc., has an immaculate reputation and design services include: analysis and design of the components of a system to perform its function under common loads as well as extreme cases of earthquake or wind loads. It involves optimization of the geometry and loads to provide the necessary functions at the lowest cost. Bishwendu Paul has over 32 years experience in engineering. Earthquake and Structures has had the honor to work on some amazing projects that include the Alameda County Youth Program building, completion of some 10,000 sq. ft., and houses around the Oakland area and Hillside houses with pier foundation. With credible work and amazing customer service, there is no one better than Earthquake and Structures, Inc.

"Experienced firm providing a professional service."

Gary Z on October 2022

Earthquake and Structures, Inc., is one of California's finest engineering corporations! Earthquakes and Structures, Inc., has an immaculate reputation and design services include: analysis and design of the components of a system to perform its function under common loads as well as extreme cases of earthquake or wind loads. It involves optimization of the geometry and loads to provide the necessary functions at the lowest cost. Bishwendu Paul has over 32 years experience in engineering. Earthquake and Structures has had the honor to work on some amazing projects that include the Alameda County Youth Program building, completion of some 10,000 sq. ft., and houses around the Oakland area and Hillside houses with pier foundation. With credible work and amazing customer service, there is no one better than Earthquake and Structures, Inc.

"Experienced firm providing a professional service."

Gary Z on October 2022


Avatar for Vista Foundry

Vista Foundry

Based In
5.00(
1
)

Vista Foundry

Based In
5.00(
1
)
3 years of experience

Fire Rebuild & Recovery Services — Helping You Recover, Rebuild, and Move Forward If your home was affected by the recent LA fires, Vista Foundry is here to help you rebuild smarter and safer. With 48 years of experience, we specialize in guiding homeowners through the recovery process with precision and expertise. Our services include: 3D Scanning & Design Recreation: Recreate your home as it was or enhance it with smarter, safer designs. Insurance Advocacy & Claim Negotiation: Maximize your payout with detailed, accurate rebuild cost estimates and expert guidance during claim negotiations. Cost-Effective Design & Engineering Solutions: We create efficient, budget-conscious plans without compromising safety or quality. Code-Compliant Structural Engineering: Ensure your new home meets today’s safety standards. Permitting & Legalization Support: Simplify the approval process and avoid delays. We focus on giving you the tools, strategies, and advocacy to restore your property, protect your investment, and rebuild with confidence. Let us help you turn a challenging situation into an opportunity to rebuild stronger and more resilient. Schedule Your Free Consultation Today → https://www.vistafoundry.com/booking

Fire Rebuild & Recovery Services — Helping You Recover, Rebuild, and Move Forward If your home was affected by the recent LA fires, Vista Foundry is here to help you rebuild smarter and safer. With 48 years of experience, we specialize in guiding homeowners through the recovery process with precision and expertise. Our services include: 3D Scanning & Design Recreation: Recreate your home as it was or enhance it with smarter, safer designs. Insurance Advocacy & Claim Negotiation: Maximize your payout with detailed, accurate rebuild cost estimates and expert guidance during claim negotiations. Cost-Effective Design & Engineering Solutions: We create efficient, budget-conscious plans without compromising safety or quality. Code-Compliant Structural Engineering: Ensure your new home meets today’s safety standards. Permitting & Legalization Support: Simplify the approval process and avoid delays. We focus on giving you the tools, strategies, and advocacy to restore your property, protect your investment, and rebuild with confidence. Let us help you turn a challenging situation into an opportunity to rebuild stronger and more resilient. Schedule Your Free Consultation Today → https://www.vistafoundry.com/booking



Wing Lee Architects Inc

No reviews yet

Wing Lee Architects Inc

No reviews yet
22 years of experience

Wing Lee Architects Inc was founded in 2003 by Wing Lee, AIA, LEED AP. We are a small, full serviced architecture firm based in San Francisco and Sonoma. The firm provides complete architectural services including programming, feasibility studies, conceptual design, schematic and design development, construction documents, assistance with permitting processes and bidding, contract administration, and LEED certification and coordination. We also provide interior design for a plethora of project types, that range from single family to public scale, with a concentration on commercial, institutional, transportation, and public sector work. We understand the pivotal role projects will play in creating a well-built environment that has its own sense of place in the community. For us, exceptional and successful design is derived from a balance of considered responses to climate, technology, culture, and site. We welcome open collaboration with clients, trusting that the final work benefits from a free flow of dialogue and ideas. The creation of each project is the result of a rigorous investigation and understanding of our client's vision.

Wing Lee Architects Inc was founded in 2003 by Wing Lee, AIA, LEED AP. We are a small, full serviced architecture firm based in San Francisco and Sonoma. The firm provides complete architectural services including programming, feasibility studies, conceptual design, schematic and design development, construction documents, assistance with permitting processes and bidding, contract administration, and LEED certification and coordination. We also provide interior design for a plethora of project types, that range from single family to public scale, with a concentration on commercial, institutional, transportation, and public sector work. We understand the pivotal role projects will play in creating a well-built environment that has its own sense of place in the community. For us, exceptional and successful design is derived from a balance of considered responses to climate, technology, culture, and site. We welcome open collaboration with clients, trusting that the final work benefits from a free flow of dialogue and ideas. The creation of each project is the result of a rigorous investigation and understanding of our client's vision.



Avatar for Tangent Design & Engineering, Inc.

Tangent Design & Engineering, Inc.

4095 Delmar Ave
5.00(
1
)

Tangent Design & Engineering, Inc.

4095 Delmar Ave
5.00(
1
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Structural Engineering, Civil Engineering, New Custom Home Design, Architectural Plans, Title 24, Solar Design, Submission and Coordination with HOA, City Design Review, Building Department Agencies. Start a new project here -> https://www.tangentde.com/contact

"They were professional, organized, and had a great communication. The pricing that they gave was better than the other company around the area. Overall the quality of the work was good."

Dani G on June 2022

Structural Engineering, Civil Engineering, New Custom Home Design, Architectural Plans, Title 24, Solar Design, Submission and Coordination with HOA, City Design Review, Building Department Agencies. Start a new project here -> https://www.tangentde.com/contact

"They were professional, organized, and had a great communication. The pricing that they gave was better than the other company around the area. Overall the quality of the work was good."

Dani G on June 2022


Avatar for RestoreX, LLC

RestoreX, LLC

450 Lakeville St
5.00(
9
)

RestoreX, LLC

450 Lakeville St
5.00(
9
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

RestoreX, LLC is a locally owned and operated Disaster Restoration Company specializing in water damage and flood removal, sewage cleanup, fire/smoke/odor cleaning services, mold inspections and mitigation for both residential and commercial properties. If you have any one of the following issues or any others please reach out for immediate assistance: Water damage Fire damage Water leak Flood Flooding Basement or crawlspace flood Roof leak Mold Extraction Wall and carpet drying Water leak Fire, smoke and odor cleanup Crawlspace moisture barriers Commercial water damage Direct insurance billing Work with all insurance companies Free inspections 24/7 Call or text: 844-MADEWHOLE (844-623-3936) Price beat guarantee! Immediate response 24/7!! http://restorex.biz

"Vendor was very responsive and professional."

JOHN L on August 2022

RestoreX, LLC is a locally owned and operated Disaster Restoration Company specializing in water damage and flood removal, sewage cleanup, fire/smoke/odor cleaning services, mold inspections and mitigation for both residential and commercial properties. If you have any one of the following issues or any others please reach out for immediate assistance: Water damage Fire damage Water leak Flood Flooding Basement or crawlspace flood Roof leak Mold Extraction Wall and carpet drying Water leak Fire, smoke and odor cleanup Crawlspace moisture barriers Commercial water damage Direct insurance billing Work with all insurance companies Free inspections 24/7 Call or text: 844-MADEWHOLE (844-623-3936) Price beat guarantee! Immediate response 24/7!! http://restorex.biz

"Vendor was very responsive and professional."

JOHN L on August 2022

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Structural Engineering questions, answered by experts

Yes, professionals reinforce the foundation with additional supports or piers to prevent future sinking.

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.

Structural engineers typically charge between $100 and $250 per hour, but many jobs won’t be based on a per-hour fee. Instead, the structural engineer will offer a flat rate for the inspection and structural calculations. The flat rate for a structural engineer costs an average of around $550, but you could see prices ranging from $300 to $800, depending on the complexity of your project and how easy it is to access certain parts of your home for the inspection.

Through detailed analysis of load paths, materials, and existing damages.

Foundation cracks that are 1/8 inch wide or less, aren’t uneven across the gap, and don’t continue widening over time are usually just normal settling cracks and don’t suggest structural issues. Horizontal cracks and stair-step cracks on foundation walls, any cracks that continue widening, are wider than 1/8 inch, or where one side juts out beyond the other, are often indicative of structural damage.

The Lagunitas-Forest Knolls, CA homeowners’ guide to structural engineering services

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