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 Loma-Mar

Avatar for Square Three, Inc.
Square Three, Inc.
830 Stewart Dr #272
4.92(
6
)
Approved Pro
Square Three, Inc.
830 Stewart Dr #272
4.92(
6
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
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. Our senior team has 10-20 years of experience specifically in the SF Bay Area. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Sanjeev has a solid team working for him that is very capable and deliver quality work. Very flexible and always trying to accommodate our needs even with unexpected changes to the project plan. Highly recommended."

Jannik O on April 2022

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. Our senior team has 10-20 years of experience specifically in the SF Bay Area. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Sanjeev has a solid team working for him that is very capable and deliver quality work. Very flexible and always trying to accommodate our needs even with unexpected changes to the project plan. Highly recommended."

Jannik O on April 2022


Avatar for Springs Construction Corporation
Springs Construction Corporation
881 Hurlingame Ave
New on HomeAdvisorNew on Angi
Approved Pro
Springs Construction Corporation
881 Hurlingame Ave
New on AngiNew 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 DARCO, LLC
DARCO, LLC
999 West Taylor Street, Suite A
4.90(
5
)
Approved Pro
DARCO, LLC
999 West Taylor Street, Suite A
4.90(
5
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

Darco Construction is a premier full-service construction company, specializing in custom home builds, remodels, and commercial projects. With a commitment to excellence, we bring your vision to life with top-tier craftsmanship, transparent budgeting, and meticulous attention to detail. From architectural design to project completion, our experienced team ensures a seamless process, delivering beautiful and functional spaces that exceed expectations.

"DARCO did a wonderful job on my kitchen/ dining space remodel. It is even more beautiful than I imagined, and everything was done with such high quality. I love sharing how beautiful it is with family, friends and neighbors!"

Judy M on November 2022

Darco Construction is a premier full-service construction company, specializing in custom home builds, remodels, and commercial projects. With a commitment to excellence, we bring your vision to life with top-tier craftsmanship, transparent budgeting, and meticulous attention to detail. From architectural design to project completion, our experienced team ensures a seamless process, delivering beautiful and functional spaces that exceed expectations.

"DARCO did a wonderful job on my kitchen/ dining space remodel. It is even more beautiful than I imagined, and everything was done with such high quality. I love sharing how beautiful it is with family, friends and neighbors!"

Judy M on November 2022


Avatar for Norwell
Norwell
437 Kipling Street, Suite 100
5.00(
5
)
Approved Pro
Norwell
437 Kipling Street, Suite 100
5.00(
5
)
Approved Pro
Customers say: Quality work
21 years of experience

At Norwell Builders we help you make the home you live in the house of your dreams. Norwell both designs and builds residential remodeling projects. From kitchen remodels to room additions, Norwell is dedicated to bringing custom remodeling projects to our clients at a fixed price! At Norwell we take your project seriously. We have assembled an outstanding team of designers, project managers, and trades people, to ensure we create the optimum solution to your needs- A solution that is aesthetically interesting, and also functional and lasting. Our challenge is to balance your needs, the style of your home, the budget, and in some cases the delivery schedule. Striking this balance is what sets Norwell apart.

"Meticulous"

sam i on May 2018

At Norwell Builders we help you make the home you live in the house of your dreams. Norwell both designs and builds residential remodeling projects. From kitchen remodels to room additions, Norwell is dedicated to bringing custom remodeling projects to our clients at a fixed price! At Norwell we take your project seriously. We have assembled an outstanding team of designers, project managers, and trades people, to ensure we create the optimum solution to your needs- A solution that is aesthetically interesting, and also functional and lasting. Our challenge is to balance your needs, the style of your home, the budget, and in some cases the delivery schedule. Striking this balance is what sets Norwell apart.

"Meticulous"

sam i on May 2018


Avatar for Unique Home Design & Remodeling
Unique Home Design & Remodeling
303 Twin Dolphin Drive, 6th Floor
4.96(
37
)
Approved Pro
Unique Home Design & Remodeling
303 Twin Dolphin Drive, 6th Floor
4.96(
37
)
Approved Pro
Customers say: Quick response
42 local quotes requested
42 years of experience

Unique Home Design & Remodeling is a leader in providing value-added construction services to our customers by creating a successful partnership throughout the construction process. Our pledge is to establish lasting relationships with our customers by exceeding their expectations and gaining their trust through exceptional performance by every member on our construction team.

"Unique Home Design & Remodeling did an absolutely phenomenal job on our kitchen. Ofir was our project manager, and from start to finish, he was incredibly responsive and hands-on. We had a very specific vision for our kitchen—mixing natural wood tones with matte black finishes—and not only did they deliver, they elevated it. The level of craftsmanship is top notch. The cabinets fit perfectly and the tile work was flawless. Ofir was great about keeping us updated, even sending photos and quick updates when we were out of town for a few days. What I really appreciated was the realistic timeline and budget. No surprises, no salesy pressure—just honest, clear communication. We’ve already recommended Ofir and his team to two of our friends. They made what we thought would be a stressful remodel feel easy and exciting!"

Ricardo F on May 2025

Unique Home Design & Remodeling is a leader in providing value-added construction services to our customers by creating a successful partnership throughout the construction process. Our pledge is to establish lasting relationships with our customers by exceeding their expectations and gaining their trust through exceptional performance by every member on our construction team.

"Unique Home Design & Remodeling did an absolutely phenomenal job on our kitchen. Ofir was our project manager, and from start to finish, he was incredibly responsive and hands-on. We had a very specific vision for our kitchen—mixing natural wood tones with matte black finishes—and not only did they deliver, they elevated it. The level of craftsmanship is top notch. The cabinets fit perfectly and the tile work was flawless. Ofir was great about keeping us updated, even sending photos and quick updates when we were out of town for a few days. What I really appreciated was the realistic timeline and budget. No surprises, no salesy pressure—just honest, clear communication. We’ve already recommended Ofir and his team to two of our friends. They made what we thought would be a stressful remodel feel easy and exciting!"

Ricardo F on May 2025


Aboveboard Construction, Inc.
3950 A Bramble Lane
New on HomeAdvisorNew on Angi
Approved Pro
Aboveboard Construction, Inc.
3950 A Bramble Lane
New on AngiNew on HomeAdvisor
Approved Pro
21 years of experience
Free onsite estimate

Serving Santa Cruz with quality craftsmanship and integrity. We bring your dream home into reality, and make reality out of your ideas, dreams and plans for your current home. From foundation to finish, professional, quality craftsmanship is our promise to you. We focus on the vision our clients have for their projects, large and small.

Serving Santa Cruz with quality craftsmanship and integrity. We bring your dream home into reality, and make reality out of your ideas, dreams and plans for your current home. From foundation to finish, professional, quality craftsmanship is our promise to you. We focus on the vision our clients have for their projects, large and small.


Avatar for Realty Builders, Inc.
Realty Builders, Inc.
50 California St Suite 1500
4.67(
6
)
Approved Pro
Realty Builders, Inc.
50 California St Suite 1500
4.67(
6
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
131 local quotes requested

With over 25 years of experience, Realty Builders is committed to excellence 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. Call us today!

"professional so far and just right for mr."

Jayson A on March 2023

With over 25 years of experience, Realty Builders is committed to excellence 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. Call us today!

"professional so far and just right for mr."

Jayson A on March 2023


Avatar for Robert Stafford, Inc.
Robert Stafford, Inc.
1180 San Carlos Ave, #718
4.83(
3
)
Approved Pro
Robert Stafford, Inc.
1180 San Carlos Ave, #718
4.83(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
34 years of experience

Welcome to ROBERT STAFFORD INC. We proudly provide the highest quality of service and craftsmanship for each aspect of your project. Our depth of knowledge and experience solidify our belief that customer service stands as the highest priority. We eagerly look forward to working with you and making your vision a reality. Give us a call, text or email today, and let us get started!

"Quick, professional, on budget"

Colin J on November 2021

Welcome to ROBERT STAFFORD INC. We proudly provide the highest quality of service and craftsmanship for each aspect of your project. Our depth of knowledge and experience solidify our belief that customer service stands as the highest priority. We eagerly look forward to working with you and making your vision a reality. Give us a call, text or email today, and let us get started!

"Quick, professional, on budget"

Colin J on November 2021


RSF Construction Inc.
6910 Monte Verde Drive
New on HomeAdvisorNew on Angi
Approved Pro
RSF Construction Inc.
6910 Monte Verde Drive
New on AngiNew on HomeAdvisor
Approved Pro
218 local quotes requested
6 years of experience

RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!


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
239 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 1004

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.