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Addition to existing structure builders in San Marcos

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 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


Avatar for Olalde Group, Inc.

Olalde Group, Inc.

741 East Adams Park Drive
5.00(
1
)
Approved Pro

Olalde Group, Inc.

741 East Adams Park Drive
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
13 local quotes requested

Olalde Group, 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 makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. Please give us a call today!

"Efrain and David are fantastic! When our contractor was suddenly unable to continue with the job, David took over with a great positive attitude. He persistently worked with the city to get the building permit, finally ending a tedious 10 month process. Crews were here working every day. Each one of them was considerate, conscientious, and demonstrated a strong work ethic. Efrain and David communicated with us most days and were always accessible to us. My ADU is adorable and just what we wanted and I am sure that many contractors could have pulled it off. The important thing about Olalde is that they truly care and honestly want us to be happy."

Judy M on October 2023

Olalde Group, 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 makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. Please give us a call today!

"Efrain and David are fantastic! When our contractor was suddenly unable to continue with the job, David took over with a great positive attitude. He persistently worked with the city to get the building permit, finally ending a tedious 10 month process. Crews were here working every day. Each one of them was considerate, conscientious, and demonstrated a strong work ethic. Efrain and David communicated with us most days and were always accessible to us. My ADU is adorable and just what we wanted and I am sure that many contractors could have pulled it off. The important thing about Olalde is that they truly care and honestly want us to be happy."

Judy M on October 2023


Avatar for MVP Leaders, Inc.

MVP Leaders, Inc.

20301 Ventura Blvd #225
4.29(
7
)
Approved Pro

MVP Leaders, Inc.

20301 Ventura Blvd #225
4.29(
7
)
Approved Pro
Customers say: Quality work
20 years of experience
Free onsite estimate

We want to change your space! It's time to once again appreciate the space that you live in and bring family and friends together in a space that you can be proud of, that represents who you are and how you want to live. From elegant interiors and inspirational exteriors to additions and Accessory Dwelling Units, MVP Builders brings years of experience, an on-budget/on-time production schedule, and a transparent project management approach to every job we take on.

"If you are dealing with MVP Builders I would be very careful. The people they hire for the jobs are not very knowledgeable and they do sloppy work. When you try to reach out to them to fix the problem they do not call back."

Tony R on May 2017

We want to change your space! It's time to once again appreciate the space that you live in and bring family and friends together in a space that you can be proud of, that represents who you are and how you want to live. From elegant interiors and inspirational exteriors to additions and Accessory Dwelling Units, MVP Builders brings years of experience, an on-budget/on-time production schedule, and a transparent project management approach to every job we take on.

"If you are dealing with MVP Builders I would be very careful. The people they hire for the jobs are not very knowledgeable and they do sloppy work. When you try to reach out to them to fix the problem they do not call back."

Tony R on May 2017


Avatar for Socal Express Restoration and Construction Inc.

Socal Express Restoration and Construction Inc.

6860 Canby Avenue, Suite 114
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Socal Express Restoration and Construction Inc.

6860 Canby Avenue, Suite 114
New on HomeAdvisorNew 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


ECS Construction, Inc.

1185 Park Center Drive, Suite T
4.88(
32
)
Approved Pro

ECS Construction, Inc.

1185 Park Center Drive, Suite T
4.88(
32
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
36 years of experience

ECS Construction has been serving San Diego's North County since 1989. We specialize in all areas of residential construction including custom homes, room additions, remodels, kitchens and baths.

"Eric and his team were professional and communicative throughout. He helped us repair an external leak of unknown origin and was able to provide reasonable estimates for repairs even before exact details of the issue were known. Would highly recommend."

Denis G on January 2024

ECS Construction has been serving San Diego's North County since 1989. We specialize in all areas of residential construction including custom homes, room additions, remodels, kitchens and baths.

"Eric and his team were professional and communicative throughout. He helped us repair an external leak of unknown origin and was able to provide reasonable estimates for repairs even before exact details of the issue were known. Would highly recommend."

Denis G on January 2024


Avatar for US PACIFICA BUILDERS

US PACIFICA BUILDERS

9557 Candida St Suite A
5.00(
11
)
Approved Pro

US PACIFICA BUILDERS

9557 Candida St Suite A
5.00(
11
)
Approved Pro
35 local quotes requested
1 years of experience

20+ Years of Experience 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.

"I hired US Pacifica Builders to completely remodel my backyard and front yard, and I couldn't be happier with the results! In the backyard, they installed beautiful artificial turf, stepping stones, and decorative river rock that transformed the space into a clean, modern, and low-maintenance retreat. Their attention to detail really shows! For the front yard, they built a solid retaining wall, poured custom concrete steps, and handled all the electrical work seamlessly. The final look is not only functional but also adds great curb appeal to my home. The team was professional, communicative, and completed everything on time and within budget. I highly recommend US Pacifica Builders for any landscaping or outdoor construction project. You?ll be in great hands!"

Natalia L on May 2025

20+ Years of Experience 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.

"I hired US Pacifica Builders to completely remodel my backyard and front yard, and I couldn't be happier with the results! In the backyard, they installed beautiful artificial turf, stepping stones, and decorative river rock that transformed the space into a clean, modern, and low-maintenance retreat. Their attention to detail really shows! For the front yard, they built a solid retaining wall, poured custom concrete steps, and handled all the electrical work seamlessly. The final look is not only functional but also adds great curb appeal to my home. The team was professional, communicative, and completed everything on time and within budget. I highly recommend US Pacifica Builders for any landscaping or outdoor construction project. You?ll be in great hands!"

Natalia L on May 2025


Avatar for Beyond Design Build

Beyond Design Build

3740 Boyd Ave, #127
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Beyond Design Build

3740 Boyd Ave, #127
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
13 local quotes requested
5 years of experience

Welcome to Beyond Design Build Based in San Diego, we specialize in creating lasting housing solutions through expertly designed and built ADUs, granny flats, room additions, and second-story expansions. With recent changes in local laws, building an ADU has never been more accessible, and our team is here to guide you through it all. Our "beyond" approach means we take your ideas and budget further than typical design-build firms, delivering quality, creativity, and value. Founded by Shahrzad, whose passion for home design began by watching her father build additions, Beyond Design Build is the realization of a lifelong dream. After running a successful solar company in Los Angeles, she moved to San Diego over a decade ago to pursue her true calling. Let's build something lasting together.

Welcome to Beyond Design Build Based in San Diego, we specialize in creating lasting housing solutions through expertly designed and built ADUs, granny flats, room additions, and second-story expansions. With recent changes in local laws, building an ADU has never been more accessible, and our team is here to guide you through it all. Our "beyond" approach means we take your ideas and budget further than typical design-build firms, delivering quality, creativity, and value. Founded by Shahrzad, whose passion for home design began by watching her father build additions, Beyond Design Build is the realization of a lifelong dream. After running a successful solar company in Los Angeles, she moved to San Diego over a decade ago to pursue her true calling. Let's build something lasting together.


Avatar for I Rayo Construction

I Rayo Construction

251 W Indian Rock Rd
5.00(
2
)
Approved Pro

I Rayo Construction

251 W Indian Rock Rd
5.00(
2
)
Approved Pro
Free onsite estimate
Warranties offered

I. Rayo Construction is a residential general contractor company specializing in high quality home construction, remodeling, and renovations We provide homeowners with comprehensive services that cover every phase of residential projects. From concept and design to construction and final completion. Our expertise includes custom home building, room additions, kitchen and bathroom remodels, outdoor living spaces and full home renovations. At I. Rayo construction we are committed to craftsmanship, clear communication and delivering results that meet both your vision and budget. We pride ourselves on professionalism, integrity, and building strong relationships with our clients. Our goal is to make the construction process simple and stress-free while creating homes that families can enjoy for generations.

"I hired Rayo Construction to do a full remodel of my home including the kitchen, bathrooms, flooring, and more and I couldn’t be happier with the results. From start to finish, the team was professional, reliable, and communicated well throughout the entire process. They stayed on schedule, kept the job site clean, and delivered high-quality craftsmanship in every detail. The transformation of my kitchen and bathrooms especially exceeded my expectations—it feels like I’m living in a brand new home. I truly appreciate their attention to detail and the pride they take in their work. Highly recommend if you’re looking for a trustworthy contractor who delivers on what they promise."

Emilio A on July 2025

I. Rayo Construction is a residential general contractor company specializing in high quality home construction, remodeling, and renovations We provide homeowners with comprehensive services that cover every phase of residential projects. From concept and design to construction and final completion. Our expertise includes custom home building, room additions, kitchen and bathroom remodels, outdoor living spaces and full home renovations. At I. Rayo construction we are committed to craftsmanship, clear communication and delivering results that meet both your vision and budget. We pride ourselves on professionalism, integrity, and building strong relationships with our clients. Our goal is to make the construction process simple and stress-free while creating homes that families can enjoy for generations.

"I hired Rayo Construction to do a full remodel of my home including the kitchen, bathrooms, flooring, and more and I couldn’t be happier with the results. From start to finish, the team was professional, reliable, and communicated well throughout the entire process. They stayed on schedule, kept the job site clean, and delivered high-quality craftsmanship in every detail. The transformation of my kitchen and bathrooms especially exceeded my expectations—it feels like I’m living in a brand new home. I truly appreciate their attention to detail and the pride they take in their work. Highly recommend if you’re looking for a trustworthy contractor who delivers on what they promise."

Emilio A on July 2025


Avatar for Cabal Construction

Cabal Construction

1059 Tierra Del Rey, Suite K
5.00(
5
)
Approved Pro

Cabal Construction

1059 Tierra Del Rey, Suite K
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3 years of experience

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.

"I hired Emmanuel 2 years ago for a major remodel of my townhome. The remodel went well and I was very happy with the results. Emmanuel was great to work with, very detailed in his estimate, and very businesslike when I requested changes. I am coming back 2 years later to write this because I did have a problem with some of the tile work. After 2 years, I sent Emmanuel a message with my concern. He immediately sent out a tile technician. He covered the costs of the repair, including procuring additional tile. His technician, Manuel, was extremely competent and kept me apprised every step of the way. When rating a business, I think the ability to overcome an issue is one of the keys one should look for. Manny went above and beyond, and I couldn't be happier."

Molly H on August 2024

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.

"I hired Emmanuel 2 years ago for a major remodel of my townhome. The remodel went well and I was very happy with the results. Emmanuel was great to work with, very detailed in his estimate, and very businesslike when I requested changes. I am coming back 2 years later to write this because I did have a problem with some of the tile work. After 2 years, I sent Emmanuel a message with my concern. He immediately sent out a tile technician. He covered the costs of the repair, including procuring additional tile. His technician, Manuel, was extremely competent and kept me apprised every step of the way. When rating a business, I think the ability to overcome an issue is one of the keys one should look for. Manny went above and beyond, and I couldn't be happier."

Molly H on August 2024

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

  • A renovated kitchen with a waterfall island

    HomeAdvisor’s DIY Kitchen Remodel Cost Guide looks at the cost of buying supplies and doing the work yourself. Find the key cost factors and how to cut expenses.

  • 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.