Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Gilroy, CA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Addition to existing structure builders in Gilroy

Avatar for Herman Construction Company

Herman Construction Company

2350 Elkins Way
4.98(
21
)
Approved Pro

Herman Construction Company

2350 Elkins Way
4.98(
21
)
Approved Pro
Super Service Award
Customers say: Quality work
25 years of experience
Free onsite estimate

With years of experience in the construction industry, we are the experts you need to take care of your home or business. We handle everything from carpentry to doors to decks. We will treat your home as we would treat our own. Give Herman Construction Company a call today, we look forward to working with you!

"I hired Karol for a bathroom remodel and Im very happy with how it turned out. Karol was great to work with. Very friendly, professional, communicative and detail oriented. I would definitely recommend him."

Mari L on June 2025

With years of experience in the construction industry, we are the experts you need to take care of your home or business. We handle everything from carpentry to doors to decks. We will treat your home as we would treat our own. Give Herman Construction Company a call today, we look forward to working with you!

"I hired Karol for a bathroom remodel and Im very happy with how it turned out. Karol was great to work with. Very friendly, professional, communicative and detail oriented. I would definitely recommend him."

Mari L on June 2025


Avatar for Bella Casa Builders, Inc.

Bella Casa Builders, Inc.

2535 Sunflower Cir
5.00(
1
)
Approved Pro

Bella Casa Builders, Inc.

2535 Sunflower Cir
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
22 years of experience

ABOUT US Bella Casa is a Design/Build custom home builder serving the Silicon Valley Area. We take pride in delivering the custom home or remodeling project of your dreams. Unlike other firms, the creative design, management, and project supervision are done by the founder. This ensures that your home will be ready for you on time, on budget, and done beautifully.

"One of the biggest benefits is the fact that they have both the home design and the building aspects of the project. The owner of the business is very creative and even after the design is completed, he still brings improvments to the design as it goes along!"

Homeowner on August 2009

ABOUT US Bella Casa is a Design/Build custom home builder serving the Silicon Valley Area. We take pride in delivering the custom home or remodeling project of your dreams. Unlike other firms, the creative design, management, and project supervision are done by the founder. This ensures that your home will be ready for you on time, on budget, and done beautifully.

"One of the biggest benefits is the fact that they have both the home design and the building aspects of the project. The owner of the business is very creative and even after the design is completed, he still brings improvments to the design as it goes along!"

Homeowner on August 2009


Avatar for BE HOME REMODELING INC

BE HOME REMODELING INC

282 Bayview Ave
4.95(
11
)
Approved Pro

BE HOME REMODELING INC

282 Bayview Ave
4.95(
11
)
Approved Pro
Customers say: Quick response
473 local quotes requested
1 years of experience

Be Home Remodeling is a home improvement company dedicated to transforming spaces with quality craftsmanship and personalized service. We specialize in a range of remodeling projects, from kitchens and bathrooms to full home renovations, back yard remodeling and more. Our team of experienced professionals collaborates closely with clients to understand their vision and bring it to life, ensuring each project reflects their style and meets their needs. Whether you're looking to update a single room or undertake a complete overhaul, Be Home Remodeling is here to make your dream home a reality.

"My journey began when I met Mario from Be Home Remodeling. I started with just one bathroom remodel, and I was immediately impressed by the professionalism, attention to detail, and high-quality craftsmanship he and his team delivered. The communication throughout the project was clear and consistent, and they made sure every step met my expectations. Since then, I?ve trusted Be Home Remodeling with additional projects and have always been more than satisfied with the results. Highly recommend Mario and his team to anyone looking for reliable and high-quality construction work"

nate b on July 2025

Be Home Remodeling is a home improvement company dedicated to transforming spaces with quality craftsmanship and personalized service. We specialize in a range of remodeling projects, from kitchens and bathrooms to full home renovations, back yard remodeling and more. Our team of experienced professionals collaborates closely with clients to understand their vision and bring it to life, ensuring each project reflects their style and meets their needs. Whether you're looking to update a single room or undertake a complete overhaul, Be Home Remodeling is here to make your dream home a reality.

"My journey began when I met Mario from Be Home Remodeling. I started with just one bathroom remodel, and I was immediately impressed by the professionalism, attention to detail, and high-quality craftsmanship he and his team delivered. The communication throughout the project was clear and consistent, and they made sure every step met my expectations. Since then, I?ve trusted Be Home Remodeling with additional projects and have always been more than satisfied with the results. Highly recommend Mario and his team to anyone looking for reliable and high-quality construction work"

nate b on July 2025


Avatar for Prosper Construction Development, Inc.

Prosper Construction Development, Inc.

180 Steuart St., Box 194631
4.88(
38
)
Approved Pro

Prosper Construction Development, Inc.

180 Steuart St., Box 194631
4.88(
38
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
189 local quotes requested

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 customizable 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!

"Fast response and clear communication throughout the process."

Marco T on April 2025

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 customizable 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!

"Fast response and clear communication throughout the process."

Marco T on April 2025


Avatar for AV Builders Group

AV Builders Group

8793 Archer Road
4.95(
11
)
Approved Pro

AV Builders Group

8793 Archer Road
4.95(
11
)
Approved Pro
Customers say: Terrific value
70 years of experience
Free onsite estimate

We are a locally owned and operated company with over 22 years of industry experience. We value honesty and integrity in all aspects of our business. We offer a variety of home improvement services that are customizable to each individual project. We specialize in handyman/carpentry work and a variety of related service and repair projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients, and guarantee your satisfaction!

"They were incredibly professional and are a delight to work with. We are absolutely delighted with our two remodeled bathrooms and cannot recommend them highly enough!"

Lisa C on July 2025

We are a locally owned and operated company with over 22 years of industry experience. We value honesty and integrity in all aspects of our business. We offer a variety of home improvement services that are customizable to each individual project. We specialize in handyman/carpentry work and a variety of related service and repair projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients, and guarantee your satisfaction!

"They were incredibly professional and are a delight to work with. We are absolutely delighted with our two remodeled bathrooms and cannot recommend them highly enough!"

Lisa C on July 2025


Avatar for Balestreri Builders, Inc.

Balestreri Builders, Inc.

19036 Fieldstone Ct
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Balestreri Builders, Inc.

19036 Fieldstone Ct
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
15 years of experience
Free onsite estimate

When you are looking for a contractor that follows business practices such as promptly returning phone calls, arriving on time for appointments and following through on promises then call our reputable business today.. We will be the one and only contractor you'll ever need. Our customer satisfaction is our top priority and will earn your trust for a lifetime. You can be assured you're in good hands with our crew working on your home improvement project. Call us today you’ll be pleased you did

When you are looking for a contractor that follows business practices such as promptly returning phone calls, arriving on time for appointments and following through on promises then call our reputable business today.. We will be the one and only contractor you'll ever need. Our customer satisfaction is our top priority and will earn your trust for a lifetime. You can be assured you're in good hands with our crew working on your home improvement project. Call us today you’ll be pleased you did


Avatar for SAN & ZOE GENERAL CONTRACTOR INC

SAN & ZOE GENERAL CONTRACTOR INC

1317 PALMERA AVE
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

SAN & ZOE GENERAL CONTRACTOR INC

1317 PALMERA AVE
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
23 local quotes requested
10 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!

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!


Avatar for Opus Contracting

Opus Contracting

3109 Heritage Valley Drive
5.00(
7
)
Approved Pro

Opus Contracting

3109 Heritage Valley Drive
5.00(
7
)
Approved Pro
39 local quotes requested
8 years of experience

We take great pride in our experience, expertise, quality and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

"Definitely recommend they came out on time gave me a great price and did great work "

Alex m on August 2025

We take great pride in our experience, expertise, quality and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

"Definitely recommend they came out on time gave me a great price and did great work "

Alex m on August 2025


Avatar for Rock N Block - Turf N Hardscapes Santa Clara

Rock N Block - Turf N Hardscapes Santa Clara

2100 S Bascom Ave Ste 1 #524
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Rock N Block - Turf N Hardscapes Santa Clara

2100 S Bascom Ave Ste 1 #524
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
740 local quotes requested
20 years of experience

Rock N Block Landscape takes great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality regardless of how large or small the job.

Rock N Block Landscape takes great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality regardless of how large or small the job.


Avatar for Superb Builders & Custom Made Cabinetry Inc.

Superb Builders & Custom Made Cabinetry Inc.

3.17(
24
)
Approved Pro

Superb Builders & Custom Made Cabinetry Inc.

3.17(
24
)
Approved Pro
Customers say: Quality work
951 local quotes requested
4 years of experience

Family owned business with over 22 years of experience -Remodeling - General - Remodeling - Kitchen & Bathroom - full home remodels - room additions - ADU's - Full Roof replacement -

"Would not recommend them to anyone. We had the worst experience with these guys. Scope of project: kitchen complete remodel, replacing carpet flooring with vinyl tile flooring , redo electrical for kitchen area only cost: 100K+ what went to plan: - kitchen demo - made one nice dry wall - setting up and framing of the kitchen area what went wrong: - communication/scheduling : we would never be told ahead of time when work was being done. Sometimes there would be days stretches where no one showed up and then guys would show up randomly on a Sunday morning. At the start of the project we told them we were going to move into the back half of the house, so just have that clean. We moved into trash and debris everywhere. They also saw a vinyl strap , strapped to our tree, tied to our neighbor's fence (it was there keeping the fence up as the tree was leaning into the neighbors fence). In their brilliance, they decided to cut the strap and use it for themselves. How did we know? we found it on our roof, used to tie some electrical conduit. Who the heck does that?! We should've cut ties at that point, it was just the start...if we only knew. But we gave them the benefit of the doubt...but things kept going wrong. - Kitchen cabinet install was not leveled, we end up telling them to not bother coming back and we installed the whole kitchen ourselves (re-leveling the base cabinets, putting on the hardware, installing the cabinet doors. - broke several custom panels (to their credit, they did pay for the reorder) but we ended up installing it ourselves , which we were never offered refund the labor. - the kitchen counter was not leveled, we also had to redo it ourselves in order for the independent countertop guys to install it. - cut hole for electrical switch too big, huge gap now in our org Eichler panel that is not repairable unless we replace the whole wall. - cut hole in wood beam ceiling too big for ceiling vent even though they had the manufacturer's specifications. tried to fix it, but it looks terrible. - lied and said they had experience installing lux vinyl tile. They didn't. The flooring , which is supposed to be new, looks like flooring that has been there for years and hadn't been replaced. It was discolored, uneven, not leveled, and not even lined up. How can you mess up lining up squares? Our sales person Joe ,came and made excuses after excuses , telling us " no one can install it better than them" , that this is the "best" we'll get. I cannot believe he could look us in the face and say that. We ended up requesting 1500 back, though for us to reorder redo the tiles for the kitchen will be 3K+. - as a last F you to us, they gave us the bill for the permit fees which includes a 3% of project cost recycling deposit that is 100% refundable if they just do the paperwork and let the city know where they recycled the demolition material. Our kitchen project was 80K and so it was $2400. Guess what, they "never heard of this" and have no proof of where they recycled the material and so cannot get the refund. I have no idea where they dumped the material.....and we're out 2400. The best thing about this project is finishing and NEVER having to deal with them again."

bobby p on April 2020

Family owned business with over 22 years of experience -Remodeling - General - Remodeling - Kitchen & Bathroom - full home remodels - room additions - ADU's - Full Roof replacement -

"Would not recommend them to anyone. We had the worst experience with these guys. Scope of project: kitchen complete remodel, replacing carpet flooring with vinyl tile flooring , redo electrical for kitchen area only cost: 100K+ what went to plan: - kitchen demo - made one nice dry wall - setting up and framing of the kitchen area what went wrong: - communication/scheduling : we would never be told ahead of time when work was being done. Sometimes there would be days stretches where no one showed up and then guys would show up randomly on a Sunday morning. At the start of the project we told them we were going to move into the back half of the house, so just have that clean. We moved into trash and debris everywhere. They also saw a vinyl strap , strapped to our tree, tied to our neighbor's fence (it was there keeping the fence up as the tree was leaning into the neighbors fence). In their brilliance, they decided to cut the strap and use it for themselves. How did we know? we found it on our roof, used to tie some electrical conduit. Who the heck does that?! We should've cut ties at that point, it was just the start...if we only knew. But we gave them the benefit of the doubt...but things kept going wrong. - Kitchen cabinet install was not leveled, we end up telling them to not bother coming back and we installed the whole kitchen ourselves (re-leveling the base cabinets, putting on the hardware, installing the cabinet doors. - broke several custom panels (to their credit, they did pay for the reorder) but we ended up installing it ourselves , which we were never offered refund the labor. - the kitchen counter was not leveled, we also had to redo it ourselves in order for the independent countertop guys to install it. - cut hole for electrical switch too big, huge gap now in our org Eichler panel that is not repairable unless we replace the whole wall. - cut hole in wood beam ceiling too big for ceiling vent even though they had the manufacturer's specifications. tried to fix it, but it looks terrible. - lied and said they had experience installing lux vinyl tile. They didn't. The flooring , which is supposed to be new, looks like flooring that has been there for years and hadn't been replaced. It was discolored, uneven, not leveled, and not even lined up. How can you mess up lining up squares? Our sales person Joe ,came and made excuses after excuses , telling us " no one can install it better than them" , that this is the "best" we'll get. I cannot believe he could look us in the face and say that. We ended up requesting 1500 back, though for us to reorder redo the tiles for the kitchen will be 3K+. - as a last F you to us, they gave us the bill for the permit fees which includes a 3% of project cost recycling deposit that is 100% refundable if they just do the paperwork and let the city know where they recycled the demolition material. Our kitchen project was 80K and so it was $2400. Guess what, they "never heard of this" and have no proof of where they recycled the material and so cannot get the refund. I have no idea where they dumped the material.....and we're out 2400. The best thing about this project is finishing and NEVER having to deal with them again."

bobby p on April 2020

...
Showing 1-10 of 990
FAQs for addition to existing structure building service projects in Gilroy, CA

Yes, hidden rooms are legal, as long as they meet all local building regulations. If you sell your house, most states require homeowners to disclose full houseplans, which would include any hidden rooms.

If your secret room is a safe room, it should contain a means of communication aside from a cell phone, such as a shortwave radio. You should also have plenty of drinking water, a portable generator, emergency food supplies, blankets, pillows, flashlights, batteries and a first aid kit.

Any time you update your home’s square footage, you increase its value, but a secret room is a niche feature that doesn't rank high on every buyer’s list of must-haves. Investing your money in remodeling more common living areas like bedrooms, bathrooms, or kitchens will have a higher ROI than adding a secret room. Many secret rooms can act as entertainment spaces (think a game room or wine cellar) or quiet spaces (a library or study), so when building your secret room you may want to consider its versatility for when you’re ready to sell.

The Gilroy, CA homeowners’ guide to addition to existing structure building services

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

  • A renovated kitchen with a waterfall island

    HomeAdvisor’s DIY Kitchen Remodel Cost Guide looks at the cost of buying supplies and doing the work yourself. Find the key cost factors and how to cut expenses.

  • Secret room within bookcase

    HomeAdvisor's expert guide walks you through the cost to build a secret room, whether you're creating a safe room for security or a fun space to fulfil your childhood fantasies. Use this guide to help plan your secret room project and explore room, concea

  • outdoor patio bar

    Explore the cost to build a bar in your home and learn how materials, wet vs. dry bars, and labor costs influence the total price of your project.