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Addition to existing structure builders in San Francisco

Universal Construction Company

161 Martin Place
4.71(
7
)
Approved Pro

Universal Construction Company

161 Martin Place
4.71(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
45 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 general contractor and home improvement services that are customizable to each individual project. We specialize in additions and bathroom remodels, but also offer a wide range of expertise for a variety of other 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, and guarantee your satisfaction!

"He is very good, communicates well, and he is there when he says he will be and very thorough! I liked doing business with him! He explains everything that he will do before he does the job and he listens to my suggestions."

Marilyn B on June 2019

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 general contractor and home improvement services that are customizable to each individual project. We specialize in additions and bathroom remodels, but also offer a wide range of expertise for a variety of other 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, and guarantee your satisfaction!

"He is very good, communicates well, and he is there when he says he will be and very thorough! I liked doing business with him! He explains everything that he will do before he does the job and he listens to my suggestions."

Marilyn B on June 2019


RSB Construction Group Inc.

58 W Portal Ave, Unit 150
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

RSB Construction Group Inc.

58 W Portal Ave, Unit 150
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
4 years of experience
Free onsite estimate

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 Kasas Builders, Inc.

Kasas Builders, Inc.

1976 Powell St Unit # 4
5.00(
5
)
Approved Pro

Kasas Builders, Inc.

1976 Powell St Unit # 4
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

Kasas Builders has 6 years in the construction industry. We love working with homeowners and seeing the beautiful finished products that our teams create. We take pride in our work and always strive for perfection. Call Kasas Builders to schedule your free estimate today!

"Hassle free experience."

Sudanshu B on August 2019

Kasas Builders has 6 years in the construction industry. We love working with homeowners and seeing the beautiful finished products that our teams create. We take pride in our work and always strive for perfection. Call Kasas Builders to schedule your free estimate today!

"Hassle free experience."

Sudanshu B on August 2019


Ashbury General Contracting and Engineering

40 12th Street
4.50(
2
)
Approved Pro

Ashbury General Contracting and Engineering

40 12th Street
4.50(
2
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
35 years of experience

Mon-Fri 7a-5pm Fully integrated company. All work is done in-house by employees not sub-contractors. 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 forwards to earning your business! Book with us online or feel free to give us a call today!

"Great work for a great price."

Paul H on March 2023

Mon-Fri 7a-5pm Fully integrated company. All work is done in-house by employees not sub-contractors. 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 forwards to earning your business! Book with us online or feel free to give us a call today!

"Great work for a great price."

Paul H on March 2023


Avatar for Level 8 Construction Inc.

Level 8 Construction Inc.

337 12th Ave
5.00(
1
)
Approved Pro

Level 8 Construction Inc.

337 12th Ave
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
20 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 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!

"I found this company to be very responsive and fair, they were extremely easy to work with, I wold highly recommend them to anybody."

Pete S on August 2020

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!

"I found this company to be very responsive and fair, they were extremely easy to work with, I wold highly recommend them to anybody."

Pete S on August 2020


AM GENERAL CONTRACTOR

2341 W Ave #133
5.00(
2
)
Approved Pro

AM GENERAL CONTRACTOR

2341 W Ave #133
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
22 years of experience

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

"What ever he plans for the project,He compleat that.He is honest and fair.I will refer him to my friends and family."

Mina R on November 2020

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

"What ever he plans for the project,He compleat that.He is honest and fair.I will refer him to my friends and family."

Mina R on November 2020


Avatar for Springs Construction Corporation

Springs Construction Corporation

881 Hurlingame Ave
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Springs Construction Corporation

881 Hurlingame Ave
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
66 years of experience
Free onsite estimate

Since 1959, Springs Construction has built its reputation on fine craftsmanship, technical expertise and solid project management.We take a proactive, client driven approach to every one of our projects, exceeding our customers vision for their homes. We want you to feel comfortable and safe during the disruption and enjoy your home for years to come.

Since 1959, Springs Construction has built its reputation on fine craftsmanship, technical expertise and solid project management.We take a proactive, client driven approach to every one of our projects, exceeding our customers vision for their homes. We want you to feel comfortable and safe during the disruption and enjoy your home for years to come.


Avatar for T Prior Building Co

T Prior Building Co

2861 WEBSTER ST, APT 4
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

T Prior Building Co

2861 WEBSTER ST, APT 4
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
1 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 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
452 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 Creation 7 Builders

Creation 7 Builders

1922 Tice Valley Blvd #2731
4.80(
41
)
Approved Pro

Creation 7 Builders

1922 Tice Valley Blvd #2731
4.80(
41
)
Approved Pro
Customers say: True professional
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
11 years of experience

Creation7 is one of the leading Contractor & Project management company in Northern California, committed to developing luxury homes and high-end interior fit outs. Our company is recognized for its ability to design and build singular constructions of all kinds, from civil engineering to buildings, and especially luxury homes, apartments, penthouses, warehouses, commercial offices or hospitality projects. We are dedicated to completing projects to a high standard of workmanship, efficiency and budget control. We achieve these goals by combining our long outstanding tradition of quality and personal commitment to each project in which we are involved. Through the team efforts of our talented and dedicated employees and the direct involvement of company owners in each and every project, we have maintained our reputation as company clients can depend on and trust to deliver projects as promised.

"Creation 7 really took the time and attention to complete our bathroom(s) remodel meticulously. They were consultative, thorough, and on top of the entire project. We couldn't be more pleased with the results."

Andy L on April 2025

Creation7 is one of the leading Contractor & Project management company in Northern California, committed to developing luxury homes and high-end interior fit outs. Our company is recognized for its ability to design and build singular constructions of all kinds, from civil engineering to buildings, and especially luxury homes, apartments, penthouses, warehouses, commercial offices or hospitality projects. We are dedicated to completing projects to a high standard of workmanship, efficiency and budget control. We achieve these goals by combining our long outstanding tradition of quality and personal commitment to each project in which we are involved. Through the team efforts of our talented and dedicated employees and the direct involvement of company owners in each and every project, we have maintained our reputation as company clients can depend on and trust to deliver projects as promised.

"Creation 7 really took the time and attention to complete our bathroom(s) remodel meticulously. They were consultative, thorough, and on top of the entire project. We couldn't be more pleased with the results."

Andy L on April 2025

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FAQs for addition to existing structure building service projects in San Francisco, 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 San Francisco, 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.

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  • 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.