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  • Verified reviews icon18
    Verified structural engineering services reviews

Find Structural engineers in Placentia

Avatar for Alpha Structural, Inc.

Alpha Structural, Inc.

4.67(
231
)
Approved Pro

Alpha Structural, Inc.

4.67(
231
)
Approved Pro
Customers say: Super punctual
33 years of experience
Free onsite estimate

Alpha Structural, Inc. has over 850 years of combined technical experience in Foundation and Hillside Repair. All of our experience is hard-core and down-in-the-trenches – not managed from behind a computer. Our in-house engineers and technicians are among the most experienced in all of Southern California. Alpha Structural, Inc. is the ONLY company in the SOCAL area licensed to ENGINEER and BUILD any type of repair project. That means that you'll work with us through the whole project, not unknown sub-contractors that you didn't hire and cannot control or predict. Alpha Structural, Inc. a licensed, bonded, and insured contractor (license # 663409). We are licensed with the following classifications: A (General Engineering Contractor). B (General Building Contractor). C-8 (Concrete). HIC (Home Improvement Contractor). CALL US NOW FOR AN INSPECTION OR ESTIMATE! (323)258-5482.

"I worked with Alpha once before, and they assisted with a second project 2 years ago which, now finally completed, I'm able to write a review about. Alpha helped with structural plans for windows in a garden level unit in order to prepare the proposal for city approval. Alpha is a big company and it took them a little while to complete everything; however I can certainly say that the engineer and contact people were knowledgeable and thorough. The plans were approved with their help and now that the unit is permitted for occupancy, the windows are a lovely attribute to the space."

Robert N on September 2024

Alpha Structural, Inc. has over 850 years of combined technical experience in Foundation and Hillside Repair. All of our experience is hard-core and down-in-the-trenches – not managed from behind a computer. Our in-house engineers and technicians are among the most experienced in all of Southern California. Alpha Structural, Inc. is the ONLY company in the SOCAL area licensed to ENGINEER and BUILD any type of repair project. That means that you'll work with us through the whole project, not unknown sub-contractors that you didn't hire and cannot control or predict. Alpha Structural, Inc. a licensed, bonded, and insured contractor (license # 663409). We are licensed with the following classifications: A (General Engineering Contractor). B (General Building Contractor). C-8 (Concrete). HIC (Home Improvement Contractor). CALL US NOW FOR AN INSPECTION OR ESTIMATE! (323)258-5482.

"I worked with Alpha once before, and they assisted with a second project 2 years ago which, now finally completed, I'm able to write a review about. Alpha helped with structural plans for windows in a garden level unit in order to prepare the proposal for city approval. Alpha is a big company and it took them a little while to complete everything; however I can certainly say that the engineer and contact people were knowledgeable and thorough. The plans were approved with their help and now that the unit is permitted for occupancy, the windows are a lovely attribute to the space."

Robert N on September 2024


Avatar for Nick Engineering, Inc.

Nick Engineering, Inc.

4.94(
17
)
Approved Pro

Nick Engineering, Inc.

4.94(
17
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
12 years of experience

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. We offer a variety of services that are customization to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships, and guarantee your satisfaction!

"Sam did a fantastic job in designing the structural engineering calculations for my new construction project in Santa Ana. He was very honest and recommended the all right things to create a strong foundation, which helped with an outstanding outcome! Sam was very helpful and responsive through the whole process especially fulfilling all the city?s requirements. I am extremely happy with my experience with Sam at Nick Engineering and will definitely use his services again in the future."

Shorouq S on December 2024

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. We offer a variety of services that are customization to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships, and guarantee your satisfaction!

"Sam did a fantastic job in designing the structural engineering calculations for my new construction project in Santa Ana. He was very honest and recommended the all right things to create a strong foundation, which helped with an outstanding outcome! Sam was very helpful and responsive through the whole process especially fulfilling all the city?s requirements. I am extremely happy with my experience with Sam at Nick Engineering and will definitely use his services again in the future."

Shorouq S on December 2024


Avatar for Level Engineering Los Angeles, CA (Main)

Level Engineering Los Angeles, CA (Main)

4.60(
270
)
Approved Pro

Level Engineering Los Angeles, CA (Main)

4.60(
270
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
10 years of experience

At LEVEL Engineering, we are committed to common sense, real-world engineering solutions. We started LEVEL because, after years in the building industry (Civil, Structural, Home Building, etc) we continued to see something missing in our industry that cost homeowners untold stress and frustration, contractors lost time and money and realtors and lenders left unable to satisfy their client's needs. We decided to do something about it, and then - LEVEL Engineering was founded. We serve your interests and provide knowledgeable, expert inspection, analysis, recommendation, and reporting. So whether your need is for permitting, forensics, foundation problems, new or repair engineering designs; or just for your peace of mind - let us help you navigate your structural engineering projects.

"extremely knowledgeable and office staff is wonderful to work with."

diana c on January 2024

At LEVEL Engineering, we are committed to common sense, real-world engineering solutions. We started LEVEL because, after years in the building industry (Civil, Structural, Home Building, etc) we continued to see something missing in our industry that cost homeowners untold stress and frustration, contractors lost time and money and realtors and lenders left unable to satisfy their client's needs. We decided to do something about it, and then - LEVEL Engineering was founded. We serve your interests and provide knowledgeable, expert inspection, analysis, recommendation, and reporting. So whether your need is for permitting, forensics, foundation problems, new or repair engineering designs; or just for your peace of mind - let us help you navigate your structural engineering projects.

"extremely knowledgeable and office staff is wonderful to work with."

diana c on January 2024


Avatar for New Beginning Engineering

New Beginning Engineering

5.00(
15
)
Approved Pro

New Beginning Engineering

5.00(
15
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
20 years of experience

We are a full service Architectural and Structural Engineering family-owned company and believe that quality, honesty, and fair pricing are the cornerstones to a trusting working relationship between home owner and engineer. Architectural and Structural Engineering Solutions For: --ADU's --New Home Design & Construction --2nd Floor Additions --Decks and Patio Covers --Retaining Walls and Basements --Home Design on Hillsides --All residential and commercial needs for Architectural and Structural Engineering We are a Christian based engineering company and conduct our business with the utmost ethics. We operate our business on a lump price fee. With this price, you don’t end up paying for change orders or comments back from the city. Our lump sum fee includes getting you all the way to permit. We will provide you with clean, clear, and professional looking architectural and structural engineering plans and calculations for both your contractor and for submission to your city agency. We also serve many realtors as well providing structural engineering assessment for properties either during a pre-approval process or during their contingency period to ensure the home being purchased is structurally adequate with no major issues. We chose to work in this industry because we want our customers to obtain their dreams. Your home is your sanctuary. Make your home the way you want it and work with a company that values trust, integrity, and quality.

"GS ArcDesign has had the privilege of working with New Beginning Engineering for many years, successfully completing over 15 projects together, with more projects currently in progress. Throughout this collaboration, I have consistently experienced the highest level of professionalism, reliability, and technical expertise from their team. Their services—including structural design, structural calculations, energy compliance (Title-24), and MEP engineering—have been integral to both residential and commercial projects, particularly those involving legalization and permitting. Each project has been handled with thoroughness, precision, and a commitment to excellence. As an architectural firm, we rely heavily on engineering partners who are not only skilled but also dependable and trustworthy. New Beginning Engineering has consistently met and exceeded those expectations, making them one of our most valued collaborators. I hold a very positive impression of New Beginning Engineering and confidently recommend their services to anyone seeking competent, reliable, and professional engineering support."

Sisitha E on August 2025

We are a full service Architectural and Structural Engineering family-owned company and believe that quality, honesty, and fair pricing are the cornerstones to a trusting working relationship between home owner and engineer. Architectural and Structural Engineering Solutions For: --ADU's --New Home Design & Construction --2nd Floor Additions --Decks and Patio Covers --Retaining Walls and Basements --Home Design on Hillsides --All residential and commercial needs for Architectural and Structural Engineering We are a Christian based engineering company and conduct our business with the utmost ethics. We operate our business on a lump price fee. With this price, you don’t end up paying for change orders or comments back from the city. Our lump sum fee includes getting you all the way to permit. We will provide you with clean, clear, and professional looking architectural and structural engineering plans and calculations for both your contractor and for submission to your city agency. We also serve many realtors as well providing structural engineering assessment for properties either during a pre-approval process or during their contingency period to ensure the home being purchased is structurally adequate with no major issues. We chose to work in this industry because we want our customers to obtain their dreams. Your home is your sanctuary. Make your home the way you want it and work with a company that values trust, integrity, and quality.

"GS ArcDesign has had the privilege of working with New Beginning Engineering for many years, successfully completing over 15 projects together, with more projects currently in progress. Throughout this collaboration, I have consistently experienced the highest level of professionalism, reliability, and technical expertise from their team. Their services—including structural design, structural calculations, energy compliance (Title-24), and MEP engineering—have been integral to both residential and commercial projects, particularly those involving legalization and permitting. Each project has been handled with thoroughness, precision, and a commitment to excellence. As an architectural firm, we rely heavily on engineering partners who are not only skilled but also dependable and trustworthy. New Beginning Engineering has consistently met and exceeded those expectations, making them one of our most valued collaborators. I hold a very positive impression of New Beginning Engineering and confidently recommend their services to anyone seeking competent, reliable, and professional engineering support."

Sisitha E on August 2025


Avatar for Alpha Omega

Alpha Omega

4.63(
75
)
Approved Pro

Alpha Omega

4.63(
75
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
22 years of experience

Alpha Omega is a full engineering firm and full service provider of residential and commercial construction with a reputation for complete customer satisfaction and on time, on budget completion of a wide variety of construction projects. With years of experience serving our clients throughout Inland Empire area, Alpha Omega has developed a reputation for intelligent design, creative problem solving, and an uncompromising commitment to professionalism, and integrity, that has made us one of the areas most respected and in demand general contractors and engineering firm. Whether working directly with our end customers, or contracted through an intermediary architectural engineering firm, we have the capability to faithfully execute your plans or provide design and build services as required.

"."

Nissa G on May 2025

Alpha Omega is a full engineering firm and full service provider of residential and commercial construction with a reputation for complete customer satisfaction and on time, on budget completion of a wide variety of construction projects. With years of experience serving our clients throughout Inland Empire area, Alpha Omega has developed a reputation for intelligent design, creative problem solving, and an uncompromising commitment to professionalism, and integrity, that has made us one of the areas most respected and in demand general contractors and engineering firm. Whether working directly with our end customers, or contracted through an intermediary architectural engineering firm, we have the capability to faithfully execute your plans or provide design and build services as required.

"."

Nissa G on May 2025


Avatar for Moonshot Consultancy LLC

Moonshot Consultancy LLC

5.00(
7
)
Approved Pro

Moonshot Consultancy LLC

5.00(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

We are committed to excellence in every aspect of our business. We 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

"Kevin is very good! Permits were approved with ease in a tough City to obtain permits."

Abdulla M on March 2024

We are committed to excellence in every aspect of our business. We 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

"Kevin is very good! Permits were approved with ease in a tough City to obtain permits."

Abdulla M on March 2024


Avatar for Harsini, Inc.

Harsini, Inc.

5.00(
6
)
Approved Pro

Harsini, Inc.

5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big or small. We are experts in our field and will always keep you informed on your particular task or project in a manner that is understandable to you. We look forward to earning your business!

"Mahyar was knowledgeable and a great communicator. His report was clear and helpful. He was also prompt in responding. All-around pleasant to work with. Highly recommend this firm."

Liz G on April 2023

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big or small. We are experts in our field and will always keep you informed on your particular task or project in a manner that is understandable to you. We look forward to earning your business!

"Mahyar was knowledgeable and a great communicator. His report was clear and helpful. He was also prompt in responding. All-around pleasant to work with. Highly recommend this firm."

Liz G on April 2023


Avatar for OConsulting

OConsulting

4.88(
4
)
Approved Pro

OConsulting

4.88(
4
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

OConsulting is locally owned and operated in Irvine, CA. With over 20 years of experience, we are experts in structural design for residential and commercial projects! We believe in empowering our clients with knowledge, taking the time to explore costs and benefits throughout the project. We are practical. We are flexible. We are customer-centric. We leverage the latest in design tools and comply with all building code requirements. We take pride in every project we take on and work hard to ensure all your expectations are met! We can help with structural design for: * NEW - We can help you from the ground-up on an entirely new project. * REMODEL - Looking to remove walls and open up space? Please note: for soils report, please contact a geotechnical firm; for a foundation inspection, please contact a foundation repair company.

"AMAZING! This was my first time doing an addition to our house and I called Fredy based on a referral from my neighbor. Fredy is nice, professional, caring and true to his word. He came out to the house, even though we are only adding 36 square feet (taking garage space to enlarge the bathroom), he treated me like it was his most important project. He answered all of my questions - I had a few being new to this. He provided all of the needed plans, specs and paperwork and for the best price (I compared 2 other firms). The plans were perfect and the city approved them while I was at the counter - in and out. After getting the plans approved, Fredy was there to answer follow up questions that my contractor had too. I will be using Fredy on every project moving forward and referring him to anyone needing his services."

Tim P on September 2021

OConsulting is locally owned and operated in Irvine, CA. With over 20 years of experience, we are experts in structural design for residential and commercial projects! We believe in empowering our clients with knowledge, taking the time to explore costs and benefits throughout the project. We are practical. We are flexible. We are customer-centric. We leverage the latest in design tools and comply with all building code requirements. We take pride in every project we take on and work hard to ensure all your expectations are met! We can help with structural design for: * NEW - We can help you from the ground-up on an entirely new project. * REMODEL - Looking to remove walls and open up space? Please note: for soils report, please contact a geotechnical firm; for a foundation inspection, please contact a foundation repair company.

"AMAZING! This was my first time doing an addition to our house and I called Fredy based on a referral from my neighbor. Fredy is nice, professional, caring and true to his word. He came out to the house, even though we are only adding 36 square feet (taking garage space to enlarge the bathroom), he treated me like it was his most important project. He answered all of my questions - I had a few being new to this. He provided all of the needed plans, specs and paperwork and for the best price (I compared 2 other firms). The plans were perfect and the city approved them while I was at the counter - in and out. After getting the plans approved, Fredy was there to answer follow up questions that my contractor had too. I will be using Fredy on every project moving forward and referring him to anyone needing his services."

Tim P on September 2021


Avatar for RCS Engineering Services

RCS Engineering Services

5.00(
3
)
Approved Pro

RCS Engineering Services

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

Our firm provides structural engineering support for all phases in the design and construction process. Our primary function is to create structural plan packages for submission to the governing authority. We are also available to conduct preliminary field visits and structural observations during construction. In whichever service you need, we pride ourselves in carrying out the job professionally, quickly, and for an affordable price.

"I searched many and started off with others and nobody came close in handling what we needed. I found Richard, he came in and took care of it all; it was completed in a timely manner with his accurate thinking. He definitely thought ahead and it saved me a lot of time, grief and money. He got ahead of any issues and resolved potential problems that could arise. He knew exactly what the city would require and did what needed to be done which saved us an untold amount of time and money. I did not know him from Adam, he works at a very different level of ability and knowledge. His pricing for me was the best! He is a gem, get him if you can!"

Constantine P on January 2020

Our firm provides structural engineering support for all phases in the design and construction process. Our primary function is to create structural plan packages for submission to the governing authority. We are also available to conduct preliminary field visits and structural observations during construction. In whichever service you need, we pride ourselves in carrying out the job professionally, quickly, and for an affordable price.

"I searched many and started off with others and nobody came close in handling what we needed. I found Richard, he came in and took care of it all; it was completed in a timely manner with his accurate thinking. He definitely thought ahead and it saved me a lot of time, grief and money. He got ahead of any issues and resolved potential problems that could arise. He knew exactly what the city would require and did what needed to be done which saved us an untold amount of time and money. I did not know him from Adam, he works at a very different level of ability and knowledge. His pricing for me was the best! He is a gem, get him if you can!"

Constantine P on January 2020


Avatar for Top Pros Construction, Inc.

Top Pros Construction, Inc.

4.97(
135
)

Top Pros Construction, Inc.

4.97(
135
)
Customers say: Quick response
Recommended by 99% of Angi customers
Recommended by 99% of HomeAdvisor customers

We are Experts in home remodeling, improvements, landscape, roofing and room additions – We are a licensed, insured, and bonded remodeling and construction company, working exclusively in home remodeling and improvements. We are a team of experienced hardworking people, project managers, engineers, architects, and designers ready to work for you. We aim to produce excellent workmanship, top quality labor, and advanced integration and affordable services that meet our clients‘ demands. Top Pros Construction provides services to all inside and outside remodeling needs on the kitchen, bathroom, room addition (ADU), and any custom remodeling you may need.

"I’m beyond happy with our new kitchen. Or at Top Pros Construction made what could have been a stressful renovation so much easier. He communicated clearly and made sure the crew respected our home. We stayed within budget and on schedule, which I know doesn’t always happen with big remodels. Now the kitchen feels open, modern, and perfect for our family dinners. I’d recommend Top Pros in a heartbeat."

John W on July 2025

We are Experts in home remodeling, improvements, landscape, roofing and room additions – We are a licensed, insured, and bonded remodeling and construction company, working exclusively in home remodeling and improvements. We are a team of experienced hardworking people, project managers, engineers, architects, and designers ready to work for you. We aim to produce excellent workmanship, top quality labor, and advanced integration and affordable services that meet our clients‘ demands. Top Pros Construction provides services to all inside and outside remodeling needs on the kitchen, bathroom, room addition (ADU), and any custom remodeling you may need.

"I’m beyond happy with our new kitchen. Or at Top Pros Construction made what could have been a stressful renovation so much easier. He communicated clearly and made sure the crew respected our home. We stayed within budget and on schedule, which I know doesn’t always happen with big remodels. Now the kitchen feels open, modern, and perfect for our family dinners. I’d recommend Top Pros in a heartbeat."

John W on July 2025

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Structural Engineering questions, answered by experts

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.

It depends on the bank and the extent of the issue. Some banks will lend against homes with minor foundation damage, but most won’t if the issue is structural since the home acts as collateral for the mortgage. Banks that offer renovation loans might still finance a home with structural problems. More minor issues like settling cracks and intermittent problems with humidity are unlikely to stop a bank from financing.

Yes, you can build over a stump if the roots are no longer alive. Living roots will continue to grow and may damage your new construction over time. Similarly, you should also remove rotting stumps because they may continue to attract pests and even cause new structures (especially those made from wood) to decompose as well.

No, beams are the primary load-bearers for flooring or roofing systems, and they distribute the weight of the structure to your foundational supports, while joists bear far less weight and distribute their loads to the beams. Beams are usually thicker and longer, and they have support posts or foundation walls beneath them for support.

Yes, walls on the top floor can be load-bearing if stacked on the floor’s foundation.

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