Q: Are hidden rooms legal?

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.

Q: What should be in a safe room?

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.

Q: Does a secret room add value to your home?

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.

Bickford Construction, Inc.

Bickford Construction, Inc.

Customers say: Quick response

3 years of experience

Free onsite estimate

At Bickford Construction, you get a team of experienced contractors that can help in all aspects of your project from pre-construction through completion. We take pride in delivering results on every project in a timely manner and within budget. We also bring decades of relationships with key people involved in ensuring your projects go as smoothly as possible. We understand that the last thing you want is a headache or to spend more money than you planned on. With us, we make it a priority to ensure your project is completed without setbacks. Bickfordconstruction.com

"They did what they said they would do. They did it in a very timely manner. They were always professional and got the job done."

Patrick V on January 2023

At Bickford Construction, you get a team of experienced contractors that can help in all aspects of your project from pre-construction through completion. We take pride in delivering results on every project in a timely manner and within budget. We also bring decades of relationships with key people involved in ensuring your projects go as smoothly as possible. We understand that the last thing you want is a headache or to spend more money than you planned on. With us, we make it a priority to ensure your project is completed without setbacks. Bickfordconstruction.com

"They did what they said they would do. They did it in a very timely manner. They were always professional and got the job done."

Patrick V on January 2023

Tech Line Construction Inc.

6114 La Salle Avenue

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•Approved Pro

Tech Line Construction Inc.

6114 La Salle Avenue

New on HomeAdvisorNew on HomeAdvisor

•Approved Pro

88 local quotes requested

5 years of experience

Welcome to Tech Line Construction, your trusted partner in enhancing your home and transforming your wishes into visual and solid realities. With over a decade of unwavering dedication and a commitment to excellence, we have proudly served our clients in delivering top-tier construction solutions. We specialize in providing top-notch services for residential and commercial projects. Our commitment to professionalism, quality, and meticulous attention to detail sets us apart from our competitors. Choose Tech Line Construction for your next construction project and experience the highest level of service and craftsmanship. Bay Area General B Contractor Jose Rodriguez ( General Building contractor ) (510)798-5869 Office@techlineconstruction.info Tech Line Construction inc TechLineconstructiondesign.com CSLB # LIC 1094361 Commercial liability &Worker comp. Insured & bonded

ABR Quality Resources Inc

ABR Quality Resources Inc

41 local quotes requested

4 years of experience

At Hamilton Exteriors, our mission is to serve our community with the highest-value construction solutions. Specializing in roofs, windows, and siding, we bring over 50 years of combined experience to every project. Our skilled team takes pride in meticulous craftsmanship and attention to detail, ensuring every job is done right the first time.

"I scheduled to have someone come give me an estimate for all new windows in our 1950s home with not so great Remodeling work by previous owners. Alex Li promptly met with us and it was a pleasure working with him & his crew throughout the entire process. They were always on time to work, left our home clean of debris & spectacular new JeldWin windows. Helped me with getting Financing as well...Just all around a great experience & highly recommend!"

Renee D on February 2025

At Hamilton Exteriors, our mission is to serve our community with the highest-value construction solutions. Specializing in roofs, windows, and siding, we bring over 50 years of combined experience to every project. Our skilled team takes pride in meticulous craftsmanship and attention to detail, ensuring every job is done right the first time.

"I scheduled to have someone come give me an estimate for all new windows in our 1950s home with not so great Remodeling work by previous owners. Alex Li promptly met with us and it was a pleasure working with him & his crew throughout the entire process. They were always on time to work, left our home clean of debris & spectacular new JeldWin windows. Helped me with getting Financing as well...Just all around a great experience & highly recommend!"

Renee D on February 2025

JMIG Construction

7720 Zilli Dr, Tracy California 95304

JMIG Construction

7720 Zilli Dr, Tracy California 95304

Customers say: Quick response

Recommended by 100% of Angi customers

101 local quotes requested

JMIG Construction brings over 20 years of expertise to the forefront, specializing in exquisite kitchen and bathroom renovations. With a steadfast commitment to quality, innovation, and client satisfaction, JMIG Construction has established itself as a premier choice for homeowners seeking to transform their living spaces into luxurious and functional retreats. At JMIG Construction, we recognize that the kitchen and bathroom are the heart of any home, where functionality meets aesthetics. With our wealth of experience and dedication to excellence, we strive to create captivating spaces that not only meet but exceed our clients' expectations. Our services encompass every aspect of kitchen and bathroom renovations! Call or click for your FREE estimate today!

"Fantastic work!"

Fred T on January 2025

JMIG Construction brings over 20 years of expertise to the forefront, specializing in exquisite kitchen and bathroom renovations. With a steadfast commitment to quality, innovation, and client satisfaction, JMIG Construction has established itself as a premier choice for homeowners seeking to transform their living spaces into luxurious and functional retreats. At JMIG Construction, we recognize that the kitchen and bathroom are the heart of any home, where functionality meets aesthetics. With our wealth of experience and dedication to excellence, we strive to create captivating spaces that not only meet but exceed our clients' expectations. Our services encompass every aspect of kitchen and bathroom renovations! Call or click for your FREE estimate today!

"Fantastic work!"

Fred T on January 2025

Red Line Remodeling & Design, LLC

Red Line Remodeling & Design, LLC

Customers say: Quality work

Recommended by 100% of Angi customers

15 local quotes requested

Red Line Remodeling & Design, LLC is the premier home improvement and remodeling company centrally located in Rio Vista serving Solano County, Sacramento County, San Joaquin, and Contra Costa County in California. We have over 20 years experience, family owned and operated. Our #1 goal as a company is having complete customer satisfaction and there is no job that is too big or too small. We specialize in a variety of projects Specializing in custom kitchen and bathroom remodeling, open concept and room additions. If you want the job done right, call us today for a free estimate.

"Extremely satisfied. I hired them for my kitchen remodel and then again for our bathroom remodel! High quality work! Friendly and easy to work with!! Will be using them again for our next project!"

Teresa U on April 2022

Red Line Remodeling & Design, LLC is the premier home improvement and remodeling company centrally located in Rio Vista serving Solano County, Sacramento County, San Joaquin, and Contra Costa County in California. We have over 20 years experience, family owned and operated. Our #1 goal as a company is having complete customer satisfaction and there is no job that is too big or too small. We specialize in a variety of projects Specializing in custom kitchen and bathroom remodeling, open concept and room additions. If you want the job done right, call us today for a free estimate.

"Extremely satisfied. I hired them for my kitchen remodel and then again for our bathroom remodel! High quality work! Friendly and easy to work with!! Will be using them again for our next project!"

Teresa U on April 2022

Tech Line Construction, Inc.

6114 La Salle Ave, Unit 296

Tech Line Construction, Inc.

6114 La Salle Ave, Unit 296

Customers say: Quick response

Recommended by 100% of Angi customers

19 local quotes requested

At Tech Line Construction, we take immense pride in our long built reputation for building stunning, efficient home improvement projects that mirror the unique style and elegance of the people who live in them. Tech Line Construction has a standing passion for the intricacies and artistry involved with residential home improvement . With team members over 15 years in the industry and a wealth of experience, Tech Line Construction is the premier choice for those looking to craft their dreams into a reality. Our focus is every little detail and we take great pride in setting the bar for the highest standards in quality craftsmanship and proactive problem-solving. Don't hesitate to contact us today for a free consultation TECHLINECONSTRUCTIONDESIGN.COM Office@techlinconstruction.info (510)798-5869

"We had a great experience working with Tech Line Construction. They did a complete remodel of our kitchen, bathroom, and flooring. The whole process was very smooth and we are extremely happy with the results. Cooking in our new kitchen is a joy and we can't wait to entertain guests in our beautiful space."

Patricia M D on November 2022

At Tech Line Construction, we take immense pride in our long built reputation for building stunning, efficient home improvement projects that mirror the unique style and elegance of the people who live in them. Tech Line Construction has a standing passion for the intricacies and artistry involved with residential home improvement . With team members over 15 years in the industry and a wealth of experience, Tech Line Construction is the premier choice for those looking to craft their dreams into a reality. Our focus is every little detail and we take great pride in setting the bar for the highest standards in quality craftsmanship and proactive problem-solving. Don't hesitate to contact us today for a free consultation TECHLINECONSTRUCTIONDESIGN.COM Office@techlinconstruction.info (510)798-5869

"We had a great experience working with Tech Line Construction. They did a complete remodel of our kitchen, bathroom, and flooring. The whole process was very smooth and we are extremely happy with the results. Cooking in our new kitchen is a joy and we can't wait to entertain guests in our beautiful space."

Patricia M D on November 2022

David Wilson Properties

David Wilson Properties

Customers say: Quick response

18 years of experience

Free onsite estimate

The experts with David Wilson Properties, serve the Galt area exclusively with pride and integrity. With a quality of work that is unparalleled, David Wilson Properties is the clear choice for your remodeling and construction project. We are licensed general contractors in the state of California and can handle any project from new construction to existing remodels. Call today to get started with a FREE Estimate!

"Best in the business! This was the 2nd house I've remodeled and Dave & his team outperformed all previous positive experiences & expectations. They removed 3 pony-walls, installed new porcelain, large tile flooring throughout (2200 sq ft), remodeled the bath to enlarge the shower,-added a modern stand-alone tub, installed new double marble-topped vanity, marble mosaic wainscotting throughout the bath, a marble-porcelain 7-foot long/12-foot high shower with luxury finishes (marble bench & rainshowers) & a chandelier above the tub with sconces flanking a 6-ft long mirror. They renovated the kitchen with new cabinets, pendant lights, quartz countertops on a new, better positioned island that Dave designed, porcelain flooring, under-cabinet lighting, and gas-burning double-sided fireplace before installing gas-top stove, electric wall ovens, refrigerator, dishwasher and double-work sink. They even installed 3 chandeliers (living room, dining & media rooms), drapery hardware at eight floor-length (12-ft high) windows & sliders, and an amazing new wet bar with vessel sink and marble with brass inlay backsplash!! They're prompt, hard-working (many times working on Saturdays and Sundays to meet deadlines), kept the project moving - even with supply delays (store's fault - not theirs) and additions I requested. They're attentive to detail, sensitive to HOA demands (never arriving too early & removing outdoor trash immediately), and professional at every turn - keeping the workspace clean/tidy. Dave goes above and beyond to satisfy his customers, reviving the art of customer service and taking it to a whole new level. For example, and though it wasn't on my list of repairs, he noted that my "new" home's air ducts needed cleaning - and shopped around for quotes I could afford. Likewise, he flushed my failing water heater in attempts to save it (original to house built in 1997). I can't say enough about this fabulous team of professionals who are as kind and personable as they are professional and skilled. I strongly recommend Dave and his team for ANY home remodel you're considering. Dave's part-designer in addition to being a fabulous contractor. He made several suggestions along the way, and I'm glad I took his advice (otherwise I wouldn't have this amazing, gourmet kitchen w/double-fireplace!). I interviewed and researched several contractors before engaging him with most exceeding his quotes by 15-25%. He's reasonably priced, comes when he says he'll be there, and makes sure the client is happy with the final product. (He even checks back a couple of weeks after the job is completed to ensure everything is functioning as it's supposed to.) I'm hiring him for my next project of replacing entry doors, and am absolutely confident he'll do a phenomenal job! THANKS DAVE, LOU and WAYNE!!! You're the BEST!! (And SnowBall sends puppy hugs to each of you!) :)"

Julie H on February 2024

The experts with David Wilson Properties, serve the Galt area exclusively with pride and integrity. With a quality of work that is unparalleled, David Wilson Properties is the clear choice for your remodeling and construction project. We are licensed general contractors in the state of California and can handle any project from new construction to existing remodels. Call today to get started with a FREE Estimate!

"Best in the business! This was the 2nd house I've remodeled and Dave & his team outperformed all previous positive experiences & expectations. They removed 3 pony-walls, installed new porcelain, large tile flooring throughout (2200 sq ft), remodeled the bath to enlarge the shower,-added a modern stand-alone tub, installed new double marble-topped vanity, marble mosaic wainscotting throughout the bath, a marble-porcelain 7-foot long/12-foot high shower with luxury finishes (marble bench & rainshowers) & a chandelier above the tub with sconces flanking a 6-ft long mirror. They renovated the kitchen with new cabinets, pendant lights, quartz countertops on a new, better positioned island that Dave designed, porcelain flooring, under-cabinet lighting, and gas-burning double-sided fireplace before installing gas-top stove, electric wall ovens, refrigerator, dishwasher and double-work sink. They even installed 3 chandeliers (living room, dining & media rooms), drapery hardware at eight floor-length (12-ft high) windows & sliders, and an amazing new wet bar with vessel sink and marble with brass inlay backsplash!! They're prompt, hard-working (many times working on Saturdays and Sundays to meet deadlines), kept the project moving - even with supply delays (store's fault - not theirs) and additions I requested. They're attentive to detail, sensitive to HOA demands (never arriving too early & removing outdoor trash immediately), and professional at every turn - keeping the workspace clean/tidy. Dave goes above and beyond to satisfy his customers, reviving the art of customer service and taking it to a whole new level. For example, and though it wasn't on my list of repairs, he noted that my "new" home's air ducts needed cleaning - and shopped around for quotes I could afford. Likewise, he flushed my failing water heater in attempts to save it (original to house built in 1997). I can't say enough about this fabulous team of professionals who are as kind and personable as they are professional and skilled. I strongly recommend Dave and his team for ANY home remodel you're considering. Dave's part-designer in addition to being a fabulous contractor. He made several suggestions along the way, and I'm glad I took his advice (otherwise I wouldn't have this amazing, gourmet kitchen w/double-fireplace!). I interviewed and researched several contractors before engaging him with most exceeding his quotes by 15-25%. He's reasonably priced, comes when he says he'll be there, and makes sure the client is happy with the final product. (He even checks back a couple of weeks after the job is completed to ensure everything is functioning as it's supposed to.) I'm hiring him for my next project of replacing entry doors, and am absolutely confident he'll do a phenomenal job! THANKS DAVE, LOU and WAYNE!!! You're the BEST!! (And SnowBall sends puppy hugs to each of you!) :)"

Julie H on February 2024

R & M Construction

R & M Construction

Customers say: Terrific value

Recommended by 94% of Angi customers

41 years of experience

R & M Construction has been building quality home additions and remodels since 1984. We also specialize in designer bathrooms and custom kitchen renovation. We also build custom ADU to fit inside of your property!

"Ron and his team were excellent to work with. They were timely, informative, and the quality of the work was great. The work was completed quicker than I anticipated. Plus, the pricing was reasonable. I will use R&M in the future!"

Chad C on July 2022

R & M Construction has been building quality home additions and remodels since 1984. We also specialize in designer bathrooms and custom kitchen renovation. We also build custom ADU to fit inside of your property!

"Ron and his team were excellent to work with. They were timely, informative, and the quality of the work was great. The work was completed quicker than I anticipated. Plus, the pricing was reasonable. I will use R&M in the future!"

Chad C on July 2022

Dynamicz Construction, Inc.

Dynamicz Construction, Inc.

Customers say: Quick response

1 years of experience

Free onsite estimate

With over 15 years of combined experience, DynamicZ Construction guarantees top-quality craftsmanship, exceptional customer care, competitive pricing, reliable service, and timely project completion. We offer a wide range of services, including: Full home remodels Bathroom remodels Kitchen remodels Home additions Accessory Dwelling Units (ADUs) Concrete installations Our business is built on a foundation of quality, reliability, and innovation. We are passionate, dedicated, and meticulous, ensuring every project reflects our commitment to excellence. At Dynamicz Construction, we value integrity, craftsmanship, and customer satisfaction, delivering results that are both stunning and enduring. We will only leave when you're 100% happy, guaranteed!

"Really happy about my bathroom renovation. Working with these guys was great! Their project manager, Zamir was transparent to me and my family about prices and costs, and he also brings a creative edge to his work. The rest of the team are just as great, they all have great humor, and really get to job done. Jose on the tiles in particular really stood out. Overall very happy with the work, idea came to life!"

Deshawn W on July 2025

With over 15 years of combined experience, DynamicZ Construction guarantees top-quality craftsmanship, exceptional customer care, competitive pricing, reliable service, and timely project completion. We offer a wide range of services, including: Full home remodels Bathroom remodels Kitchen remodels Home additions Accessory Dwelling Units (ADUs) Concrete installations Our business is built on a foundation of quality, reliability, and innovation. We are passionate, dedicated, and meticulous, ensuring every project reflects our commitment to excellence. At Dynamicz Construction, we value integrity, craftsmanship, and customer satisfaction, delivering results that are both stunning and enduring. We will only leave when you're 100% happy, guaranteed!

"Really happy about my bathroom renovation. Working with these guys was great! Their project manager, Zamir was transparent to me and my family about prices and costs, and he also brings a creative edge to his work. The rest of the team are just as great, they all have great humor, and really get to job done. Jose on the tiles in particular really stood out. Overall very happy with the work, idea came to life!"

Deshawn W on July 2025

Streamline Renovators LLC

Streamline Renovators LLC

Customers say: Terrific value

Recommended by 90% of Angi customers

46 local quotes requested

Here at Streamline we are absolute specialists when it comes to communications, speed and accuracy of completing our remodel projects. We have amazing deals on kitchen's l, baths and paint! We know how challenging it can be dealing with contractors after doing many of our own projects and thats why we decided to start our own company! With over 30 years of experience on our team we can ensure reputable advice. We are a local family owned and operated business and your experience working with us will feel just like that. Family! Give us a call set up a consultation we love to connect with you

"Five stars"

Gwen L on July 2024

Here at Streamline we are absolute specialists when it comes to communications, speed and accuracy of completing our remodel projects. We have amazing deals on kitchen's l, baths and paint! We know how challenging it can be dealing with contractors after doing many of our own projects and thats why we decided to start our own company! With over 30 years of experience on our team we can ensure reputable advice. We are a local family owned and operated business and your experience working with us will feel just like that. Family! Give us a call set up a consultation we love to connect with you

"Five stars"

Gwen L on July 2024

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

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Bickford Construction, Inc.

Bickford Construction, Inc.

Tech Line Construction Inc.

Tech Line Construction Inc.

ABR Quality Resources Inc

ABR Quality Resources Inc

JMIG Construction

JMIG Construction

Red Line Remodeling & Design, LLC

Red Line Remodeling & Design, LLC

Tech Line Construction, Inc.

Tech Line Construction, Inc.

David Wilson Properties

David Wilson Properties

R & M Construction

R & M Construction

Dynamicz Construction, Inc.

Dynamicz Construction, Inc.

Streamline Renovators LLC

Streamline Renovators LLC

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

How Much Does a Bus Conversion Cost in 2025?

DIY Kitchen Remodel

Build a Dining Room

Build a Secret Room

Build an A-Frame House

Build a Bar

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

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Find Addition to existing structure builders in Discovery Bay

Bickford Construction, Inc.

Bickford Construction, Inc.

Tech Line Construction Inc.

Tech Line Construction Inc.

ABR Quality Resources Inc

ABR Quality Resources Inc

JMIG Construction

JMIG Construction

Red Line Remodeling & Design, LLC

Red Line Remodeling & Design, LLC

Tech Line Construction, Inc.

Tech Line Construction, Inc.

David Wilson Properties

David Wilson Properties

R & M Construction

R & M Construction

Dynamicz Construction, Inc.

Dynamicz Construction, Inc.

Streamline Renovators LLC

Streamline Renovators LLC

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

How Much Does a Bus Conversion Cost in 2025?

DIY Kitchen Remodel

Build a Dining Room

Build a Secret Room

Build an A-Frame House

Build a Bar

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