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 Del Mar

SEAMLESS BUILDERS INC
9223 DALEHURST Rd
New on HomeAdvisorNew on Angi
Approved Pro
SEAMLESS BUILDERS INC
9223 DALEHURST Rd
New on AngiNew on HomeAdvisor
Approved Pro
2 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! Book with us online or feel free to give us a call today

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! Book with us online or feel free to give us a call today


Dryfix Services, Inc.
2252 Main St Unit 10
New on HomeAdvisorNew on Angi
Approved Pro
Dryfix Services, Inc.
2252 Main St Unit 10
New on AngiNew on HomeAdvisor
Approved Pro
13 years of experience
Free onsite estimate

We are 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."

We are 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."


Avatar for Preferred Remodelers
Preferred Remodelers
1145-C Industrial Avenue
5.00(
8
)
Approved Pro
Preferred Remodelers
1145-C Industrial Avenue
5.00(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
39 years of experience

It is my mission to provide excellence to all our projects and exceed our clients’ expectations of the value they will receive by providing professionalism of management, as well as high quality craftsmanship. Trust and honesty are to be the foundation for all our client and business relationships. It is my goal to develop and nurture relationships with our clients and business associates by maintaining a team atmosphere with a common goal.

"Jim is a great guy to work with!!! He was very understanding and responsive to all my questions and concerns. He oversaw the entire operation of removing a wall to open up the living area. This encompassed general demo and construction, electrical, resurfacing, matching texture and repainting. Followed by some special hardwood floor detail work. His team of workers are always excellent and considerate of us and our home. You will not be disappointed! It is very difficult to try and choose a contractor and I feel lucky to have found him!!"

Melody M on November 2021

It is my mission to provide excellence to all our projects and exceed our clients’ expectations of the value they will receive by providing professionalism of management, as well as high quality craftsmanship. Trust and honesty are to be the foundation for all our client and business relationships. It is my goal to develop and nurture relationships with our clients and business associates by maintaining a team atmosphere with a common goal.

"Jim is a great guy to work with!!! He was very understanding and responsive to all my questions and concerns. He oversaw the entire operation of removing a wall to open up the living area. This encompassed general demo and construction, electrical, resurfacing, matching texture and repainting. Followed by some special hardwood floor detail work. His team of workers are always excellent and considerate of us and our home. You will not be disappointed! It is very difficult to try and choose a contractor and I feel lucky to have found him!!"

Melody M on November 2021


PDC
1551 Calle De Andluca
5.00(
2
)
Approved Pro
PDC
1551 Calle De Andluca
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
36 years of experience

We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at PDC, strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.

"He did an excellent job."

Tye M on May 2021

We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at PDC, strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.

"He did an excellent job."

Tye M on May 2021


Avatar for Socal Express Restoration and Construction Inc.
Socal Express Restoration and Construction Inc.
6860 Canby Avenue, Suite 114
New on HomeAdvisorNew on Angi
Approved Pro
Socal Express Restoration and Construction Inc.
6860 Canby Avenue, Suite 114
New on AngiNew on HomeAdvisor
Approved Pro
5 years of experience
Free onsite estimate

We are an ethical, honest and professional company. We are easy to communicate with. Always working with you until the job is done right and to your specifications. When working with our company you can expect integrity, prompt service and superior customer service. Always leaving the job site clean . We take pride in our services and enjoy making clients repeat clients. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. Call us today for your free estimate. You’ll be pleased you did. Thank you

We are an ethical, honest and professional company. We are easy to communicate with. Always working with you until the job is done right and to your specifications. When working with our company you can expect integrity, prompt service and superior customer service. Always leaving the job site clean . We take pride in our services and enjoy making clients repeat clients. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. Call us today for your free estimate. You’ll be pleased you did. Thank you


Pen & Mason Construction, Inc.
4025 NORDICA Ave
5.00(
2
)
Approved Pro
Pen & Mason Construction, Inc.
4025 NORDICA Ave
5.00(
2
)
Approved Pro
10 local quotes requested
3 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! Book with us online or feel free to give us a call today! Our reputation is based on service, safety and quality, regardless of how large or small the job.

"I contacted Pen and Mason for some home improvements I needed new lights installed in my kitchen, a door replaced, and some additional fence work. I sent a message and got an immediate response. We quickly scheduled a meeting, and Juan came by. He was very polite and really listened to what I wanted. He even showed me a couple of different lighting options that matched exactly what l was looking for. The very next day, Juan showed up with the new door and lighting. As he worked, I noticed how professional and clean he was. I ended up asking if he could take on a bit more work, and he had no problem with that at all. He made the whole process super easy and stress free. One of the standout parts was the custom metal fence he made by hand to fit my existing block wall. It came out great. I would highly recommend Pen and Mason for any home improvement needs. Definitely a 5 star contractor!"

Carlos G on April 2025

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! Book with us online or feel free to give us a call today! Our reputation is based on service, safety and quality, regardless of how large or small the job.

"I contacted Pen and Mason for some home improvements I needed new lights installed in my kitchen, a door replaced, and some additional fence work. I sent a message and got an immediate response. We quickly scheduled a meeting, and Juan came by. He was very polite and really listened to what I wanted. He even showed me a couple of different lighting options that matched exactly what l was looking for. The very next day, Juan showed up with the new door and lighting. As he worked, I noticed how professional and clean he was. I ended up asking if he could take on a bit more work, and he had no problem with that at all. He made the whole process super easy and stress free. One of the standout parts was the custom metal fence he made by hand to fit my existing block wall. It came out great. I would highly recommend Pen and Mason for any home improvement needs. Definitely a 5 star contractor!"

Carlos G on April 2025


Avatar for EG Construction and Restoration
EG Construction and Restoration
8146 Miramar Road
4.95(
11
)
Approved Pro
EG Construction and Restoration
8146 Miramar Road
4.95(
11
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
20 years of experience

We offer a full range of residential construction services. We specialize in home remodels, office remodels, bathroom remodels, kitchen remodels, room additions, tile/ flooring installation, plumbing services, electrical wiring, interior and exterior paint, drywall installation, cabinetry, concrete and masonry, as well as ADU construction. We strive to make our customers homes or offices better and improve their lifestyles through our expertise in construction and design.

"Review time! Are you sure you want me to review EG Construction? The answer is, of course! Time has passed a bit since Elias and crew completed the project for our home here in San Diego. I just did not have the time to sit down and focus on a review for this company, but I do have time now. The guys who showed up to do the work were great. Communications from the group was excellent, no issues at all while we worked from home. The engineered wood flooring looks amazing and I really appreciate the care they took to provide a high-quality job while completing it within our agreed time schedule. Elias had no issue working this project through the holidays (it was almost Christmas), but good thing it was completed prior to that! Kudos to the crew for working so diligently and at the same time keeping the level of quality in check. No one is perfect, could there be something that they could do to improve? Sure, letâ s just say we were glad that we were not in a rush to get this project done. E.G. Construction was a bit slow to get back with estimates and follow ups on material prices. Talk about the price, their estimates were in line with other bids we received. Yes, we did shop around and almost went to another contractor, however, my wife leaned towards giving E.G. Construction an opportunity. In any case, the job was done right and thatâ s the most important thing that mattered. This is a family company, so I understand not all process is perfect so I did not mind for some of the communication delays. Paola was straightforward and easy to work with when we got in touch, she also was able to get me an answer when I asked. Also, maybe our home project is really small compared to what they are usually chasing after. Elias seemed to always act responsible and I love his stylish fashion outfit (I like his fashionable glasses the day he showed up for a final follow up with me). Not only do I recommend E.G. Construction, but we do not believe we are done with their services. Labor in general is not cheap, but quality service is not an option and I believe E.G. Construction provides excellent quality. Since we have enough left-over material to replace other carpet areas, we hope E.G. Construction will be our partner in that future project."

Allen W on February 2024

We offer a full range of residential construction services. We specialize in home remodels, office remodels, bathroom remodels, kitchen remodels, room additions, tile/ flooring installation, plumbing services, electrical wiring, interior and exterior paint, drywall installation, cabinetry, concrete and masonry, as well as ADU construction. We strive to make our customers homes or offices better and improve their lifestyles through our expertise in construction and design.

"Review time! Are you sure you want me to review EG Construction? The answer is, of course! Time has passed a bit since Elias and crew completed the project for our home here in San Diego. I just did not have the time to sit down and focus on a review for this company, but I do have time now. The guys who showed up to do the work were great. Communications from the group was excellent, no issues at all while we worked from home. The engineered wood flooring looks amazing and I really appreciate the care they took to provide a high-quality job while completing it within our agreed time schedule. Elias had no issue working this project through the holidays (it was almost Christmas), but good thing it was completed prior to that! Kudos to the crew for working so diligently and at the same time keeping the level of quality in check. No one is perfect, could there be something that they could do to improve? Sure, letâ s just say we were glad that we were not in a rush to get this project done. E.G. Construction was a bit slow to get back with estimates and follow ups on material prices. Talk about the price, their estimates were in line with other bids we received. Yes, we did shop around and almost went to another contractor, however, my wife leaned towards giving E.G. Construction an opportunity. In any case, the job was done right and thatâ s the most important thing that mattered. This is a family company, so I understand not all process is perfect so I did not mind for some of the communication delays. Paola was straightforward and easy to work with when we got in touch, she also was able to get me an answer when I asked. Also, maybe our home project is really small compared to what they are usually chasing after. Elias seemed to always act responsible and I love his stylish fashion outfit (I like his fashionable glasses the day he showed up for a final follow up with me). Not only do I recommend E.G. Construction, but we do not believe we are done with their services. Labor in general is not cheap, but quality service is not an option and I believe E.G. Construction provides excellent quality. Since we have enough left-over material to replace other carpet areas, we hope E.G. Construction will be our partner in that future project."

Allen W on February 2024


Avatar for Remcon Design Build
Remcon Design Build
7154 Convoy Ct
5.00(
1
)
Approved Pro
Remcon Design Build
7154 Convoy Ct
5.00(
1
)
Approved Pro
19 years of experience
Free onsite estimate

Remcon Design Build 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.

Remcon Design Build 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.


Avatar for Coastal Contracting, Inc.
Coastal Contracting, Inc.
5476 Moonlight Lane
4.50(
8
)
Approved Pro
Coastal Contracting, Inc.
5476 Moonlight Lane
4.50(
8
)
Approved Pro
Customers say: Quick response
27 years of experience
Free onsite estimate

Coastal Contracting Inc. offers honest, reliable and professional craftsmanship. We specialize in the design and remodel of kitchens and bathrooms. We promise you won't be disappointed with our work. Behind that promise, we want you to know that we back our work with satisfaction guarantee. We won't stop working until you like what we have done.

"Very Professional. Always on time. Cleaned up everyday. Work was of the highest quality. Always polite. Work was done during the Corona Pandemic (after the state allowed this type of work) and workers always wore face masks and socially distanced. Would definitely use Coastal Contracting and Brennon again."

Eugene H on September 2020

Coastal Contracting Inc. offers honest, reliable and professional craftsmanship. We specialize in the design and remodel of kitchens and bathrooms. We promise you won't be disappointed with our work. Behind that promise, we want you to know that we back our work with satisfaction guarantee. We won't stop working until you like what we have done.

"Very Professional. Always on time. Cleaned up everyday. Work was of the highest quality. Always polite. Work was done during the Corona Pandemic (after the state allowed this type of work) and workers always wore face masks and socially distanced. Would definitely use Coastal Contracting and Brennon again."

Eugene H on September 2020


Active Endeavor, Inc.
4124 North Bonita Street
5.00(
3
)
Approved Pro
Active Endeavor, Inc.
4124 North Bonita Street
5.00(
3
)
Approved Pro
Customers say: Quick response
14 years of experience
Free onsite estimate

A E Design & Build 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. Rated A+ by the BBB, timely communication 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.

"Dirk was a consummate professional. His work was completed on time and under my budget as he worked to save us money rather than trying to upsell at every opportunity. His crew were very skilled and friendly. I will utilize them in the future on another project and would recommend him to anyone looking for construction done on their house"

Rusty D on August 2024

A E Design & Build 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. Rated A+ by the BBB, timely communication 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.

"Dirk was a consummate professional. His work was completed on time and under my budget as he worked to save us money rather than trying to upsell at every opportunity. His crew were very skilled and friendly. I will utilize them in the future on another project and would recommend him to anyone looking for construction done on their house"

Rusty D on August 2024

...
Showing 1-10 of 983

Addition to existing structure building services FAQs

Building an in-law suite takes between two and seven months. Converting an existing basement, attic, or room can be done in about two months. Constructing a new addition or detached suite often takes four to five months for construction, plus one to two months for permits. The bigger the suite, the longer it will take. 

Yes, you can build an in-law suite in your backyard if you meet local building codes and zoning regulations. An in-law suite often occupies 300 to 800 square feet. Be sure to follow size restrictions, utility separations, and entrance requirements. Hiring a qualified contractor ensures you meet all regulatory requirements because they can pull permits, double-check local code, and gather other skilled pros to work on your suite. 

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.
BRIGHT OPEN ATTIC SPACE
Apr 24, 2025
Apr 24, 2025
An in-law suite is a great solution for people who have family visiting often. Explore how much an in-law suite costs and prep to build yours.
A white wood ceiling
Apr 23, 2025
Apr 23, 2025
Looking to vault a ceiling? Here’s how much it costs, what factors affect cost, and what to expect.
Outdoor view of the modern house
Apr 22, 2025
Apr 22, 2025
Explore how square footage, room type, home additions, and other common factors affect house renovation costs with our detailed cost guide.
A rustic wooden cabin in the woods
Apr 21, 2025
Apr 21, 2025
Discover how much a log cabin costs to build, exploring how factors like its size, site prep, utilities, finishes, and labor rates affect the total price.
CONTRACTOR LOOKING OVER HOME DEVELOPMENT
Apr 19, 2025
Apr 19, 2025
Budget for your general contractor’s hourly rate by considering factors such as project scope, fee structure, pricing model, and more.
stucco home with cracks from earthquake damage
Apr 16, 2025
Apr 16, 2025
Work out the full cost to repair earthquake damage based on the type of damage, including foundation issues, utility lines, and cracked walls.
Share project details to get started.