Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in your area

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 Discovery Bay

Avatar for Bickford Construction, Inc.
Bickford Construction, Inc.
PO Box 1144
5.00(
6
)
Approved Pro
Bickford Construction, Inc.
PO Box 1144
5.00(
6
)
Approved Pro
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


C W Adams Construction, Inc.
1489 College Ave
5.00(
4
)
Approved Pro
C W Adams Construction, Inc.
1489 College Ave
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
25 years of experience

C W Adams Construction Inc is 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

"Clifford went above and beyond to meet my expectations for my dream bathroom! The work was completed on time and I was kept informed on how the projects were progressing. Next time I have the budget for more renovations, I will be calling Cliff."

Olivia J on June 2023

C W Adams Construction Inc is 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

"Clifford went above and beyond to meet my expectations for my dream bathroom! The work was completed on time and I was kept informed on how the projects were progressing. Next time I have the budget for more renovations, I will be calling Cliff."

Olivia J on June 2023


Avatar for JP Winchell Construction, Inc.
JP Winchell Construction, Inc.
10 Softwind Drive
5.00(
2
)
Approved Pro
JP Winchell Construction, Inc.
10 Softwind Drive
5.00(
2
)
Approved Pro
Customers say: Quick response
14 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!

"JP Winchell Construction has done an amazing job with my bathroom remodel. They were very attentive to my needs, and worked with me on design choices every step of the way. If you want your project done right the first time, I would choose this company over others I have used in the past. Thank you for all your hard work and dedication to detail!"

Elaine _ on December 2024

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!

"JP Winchell Construction has done an amazing job with my bathroom remodel. They were very attentive to my needs, and worked with me on design choices every step of the way. If you want your project done right the first time, I would choose this company over others I have used in the past. Thank you for all your hard work and dedication to detail!"

Elaine _ on December 2024


Avatar for Pacific Bay Construction
Pacific Bay Construction
1990 North California Boulevard, Suite 20
5.00(
5
)
Approved Pro
Pacific Bay Construction
1990 North California Boulevard, Suite 20
5.00(
5
)
Approved Pro
12 years of experience
Free onsite estimate

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 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!

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 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!


Avatar for Creekside Pro Construction, Inc.
Creekside Pro Construction, Inc.
3478 Buskirk Ave #105
5.00(
24
)
Approved Pro
Creekside Pro Construction, Inc.
3478 Buskirk Ave #105
5.00(
24
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
4 years of experience

We take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers 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.

"We hired them to install new flooring throughout our home, and we were blown away by their expertise and attention to detail. They helped us select the perfect materials for our needs and budget, and their installation work was flawless. Our new floors look fantastic and have completely transformed the look and feel of our home. Thank you, Creekside Pro Construction, for your excellent work!"

Jack J on May 2023

We take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers 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.

"We hired them to install new flooring throughout our home, and we were blown away by their expertise and attention to detail. They helped us select the perfect materials for our needs and budget, and their installation work was flawless. Our new floors look fantastic and have completely transformed the look and feel of our home. Thank you, Creekside Pro Construction, for your excellent work!"

Jack J on May 2023


Avatar for BE HOME REMODELING INC
BE HOME REMODELING INC
282 Bayview Ave
4.93(
7
)
Approved Pro
BE HOME REMODELING INC
282 Bayview Ave
4.93(
7
)
Approved Pro
Customers say: Quick response
20 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.

"I got my kitchen done with Be home remodeling , the work was amazing! From the moment I meet the project manager Mario , I could say this company is the right one . The did my kitchen along with all the floor all throughout my house , upgraded my main panel service and I couldn?t be more happier with the result . I definitely recommend be home remodeling for any homeowner that want a high end service and work. thank you Be Home Team ! "

liubov i on March 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.

"I got my kitchen done with Be home remodeling , the work was amazing! From the moment I meet the project manager Mario , I could say this company is the right one . The did my kitchen along with all the floor all throughout my house , upgraded my main panel service and I couldn?t be more happier with the result . I definitely recommend be home remodeling for any homeowner that want a high end service and work. thank you Be Home Team ! "

liubov i on March 2025


Avatar for Step Up Construction
Step Up Construction
398 Bay St
5.00(
5
)
Approved Pro
Step Up Construction
398 Bay St
5.00(
5
)
Approved Pro
Customers say: Quick response
3 years of experience
Free onsite estimate

Serving The Bay Area for over a decade Are you looking to upgrade your house and give it a brand-new look? Look no further than our company to rebuild your home and create a new level of interior design. We understand that renovating or rebuilding a home can be a daunting process, so let us do the work for you! Our team of experts will provide the best building supplies and full service to give you the home of your dreams. We guarantee that you won’t be disappointed with the results. https://stepup-construction.com/about

"Gabriel and his team did a Fantastic job.!!!"

angel F on November 2024

Serving The Bay Area for over a decade Are you looking to upgrade your house and give it a brand-new look? Look no further than our company to rebuild your home and create a new level of interior design. We understand that renovating or rebuilding a home can be a daunting process, so let us do the work for you! Our team of experts will provide the best building supplies and full service to give you the home of your dreams. We guarantee that you won’t be disappointed with the results. https://stepup-construction.com/about

"Gabriel and his team did a Fantastic job.!!!"

angel F on November 2024


Avatar for MARTIN A MILLER CONSTRUCTION
MARTIN A MILLER CONSTRUCTION
1850 PARKSIDE DR
New on HomeAdvisorNew on Angi
Approved Pro
MARTIN A MILLER CONSTRUCTION
1850 PARKSIDE DR
New on AngiNew on HomeAdvisor
Approved Pro
1 years of experience
Free onsite estimate

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.

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.


Avatar for Red Line Remodeling & Design, LLC
Red Line Remodeling & Design, LLC
870 Hillside Terrace
4.86(
7
)
Approved Pro
Red Line Remodeling & Design, LLC
870 Hillside Terrace
4.86(
7
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
31 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


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
243 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

...
Showing 1-10 of 986

Addition to existing structure building services FAQs

How far you can push a room depends on the structure you choose. A cantilevered bump-out can extend 24 inches before building codes require its own footing or foundation. Anything longer needs engineered support and a permit. Check local codes or consult with a structural professional before finalizing plans to ensure your design remains safe and compliant.

Most bump-outs are completed within one to four weeks, even with minimal electrical, plumbing, or HVAC work. Their compact size means less demolition, simpler inspections, and fewer weather-related delays compared to a full-scale addition. Your contractor can provide a more precise timeline once they have determined the scope, materials, and permit schedule, but plan on having the extra square footage ready in approximately a month.

The 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.
built-in outdoor kitchen with grill and sink
Apr 30, 2025
Apr 30, 2025
Budget for outdoor kitchen costs based on factors such as appliances, materials, permits, labor, amenities, kitchen size, customizations, and more.
BLUE TWO STORY HOME
Apr 30, 2025
Apr 30, 2025
Budget for the cost to add a second story based on factors such as size, foundation work, materials, labor, permits, post-construction cleaning, and more.
small bathroom that has been updated in a remodel
Apr 29, 2025
Apr 29, 2025
Budget for the cost to remodel a small bathroom based on factors such as required fixtures, bathroom size, labor, remodel type, site prep, and more.
guest house in the backyard
Apr 27, 2025
Apr 27, 2025
Need to build a guest house? Here’s how much it costs, what factors affect cost, and what to expect.
Kitchen view leading into dining area
Apr 28, 2025
Apr 28, 2025
Use this guide to budget for bump-out addition costs based on factors such as room size, room type, labor, finishes, permits, and more.
House roof with nice window
Apr 28, 2025
Apr 28, 2025
Budget for dormer addition costs based on factors such as roof type, framing, customizations, reinforcement, cladding, labor, and more.
Share project details to get started.