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Find Addition to existing structure builders in San Marcos

Avatar for CW Custom Builders

CW Custom Builders

555 County Road 405
New on HomeAdvisorNew on HomeAdvisor
•Approved Pro

CW Custom Builders

555 County Road 405
New on HomeAdvisorNew on HomeAdvisor
•Approved Pro
2025 years of experience
Free onsite estimate

CW Custom Builders is a high-quality residential and commercial construction company serving Central Texas. We handle all phases of construction—from new builds to remodeling and additions—while priding ourselves on a foundation of honesty and integrity. Call today to get your project underway 830-391-9897.

CW Custom Builders is a high-quality residential and commercial construction company serving Central Texas. We handle all phases of construction—from new builds to remodeling and additions—while priding ourselves on a foundation of honesty and integrity. Call today to get your project underway 830-391-9897.

Avatar for M&C Remodeling, LLC

M&C Remodeling, LLC

10596 State Park Rd
4.86(
7
)
•Approved Pro

M&C Remodeling, LLC

10596 State Park Rd
4.86(
7
)
•Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
19 years of experience

At M&C Remodeling LLC, we are built on the values of integrity, dependability, and pride in workmanship. Each project is carried out with professionalism and attention to detail, leaving homes not only improved but elevated. Our goal is to make sure every project is handled with care, precision, and respect for your home. Our mission is to provide dependable, high-quality remodeling services that bring you peace of mind, comfort, value, and pride to every space of your home. We focus on delivering results that are built to last. We stand on integrity, reliability, quality, and craftsmanship. We not only complete projects, but we also create certainty and trusted partnerships.

"Fabulous to work with."

Jill M on January 2023

At M&C Remodeling LLC, we are built on the values of integrity, dependability, and pride in workmanship. Each project is carried out with professionalism and attention to detail, leaving homes not only improved but elevated. Our goal is to make sure every project is handled with care, precision, and respect for your home. Our mission is to provide dependable, high-quality remodeling services that bring you peace of mind, comfort, value, and pride to every space of your home. We focus on delivering results that are built to last. We stand on integrity, reliability, quality, and craftsmanship. We not only complete projects, but we also create certainty and trusted partnerships.

"Fabulous to work with."

Jill M on January 2023

Avatar for Loviolette Enterprises

Loviolette Enterprises

7130 Water Supply Rd
4.88(
17
)
•Approved Pro

Loviolette Enterprises

7130 Water Supply Rd
4.88(
17
)
•Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
17 local quotes requested

From the initial design process to construction completion, we consider ourselves humble guests in your home, and as such respect your personal privacy and space. Classic Restoration of your home. Full service.

"Elliott did an amazing job! We were looking for a kitchen demo and new drywall so we could have cabinets installed. Elliott was very thorough with his assessment of the room and made sure the job was done right. He notified us of problems he found along the way and managed to keep us in our budget. We will definitely be using Loviolette Enterprises in the future!"

Daniel W on January 2024

From the initial design process to construction completion, we consider ourselves humble guests in your home, and as such respect your personal privacy and space. Classic Restoration of your home. Full service.

"Elliott did an amazing job! We were looking for a kitchen demo and new drywall so we could have cabinets installed. Elliott was very thorough with his assessment of the room and made sure the job was done right. He notified us of problems he found along the way and managed to keep us in our budget. We will definitely be using Loviolette Enterprises in the future!"

Daniel W on January 2024

Avatar for Sols Landscaping LLC

Sols Landscaping LLC

Located At
4.90(
10
)
•Approved Pro

Sols Landscaping LLC

Located At
4.90(
10
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
70 local quotes requested

Welcome to Sols Landscaping LLC! We specialize in all outdoor needs, Tree trimming, Yard work, Masonry, Pavers, Concrete needs, Patio, Decks and more. Outdoor kitchens, fireplaces, patios, flowerbeds

"Sols Landscaping did an outstanding job on my landscaping project. I voiced my vision and it was perfecto. They brought my vision to life beyond my expectation. I would highly recommend and continue using Sols Landscaping LLC for all my future projects. Thank you Sols!"

Melissa T on February 2025

Welcome to Sols Landscaping LLC! We specialize in all outdoor needs, Tree trimming, Yard work, Masonry, Pavers, Concrete needs, Patio, Decks and more. Outdoor kitchens, fireplaces, patios, flowerbeds

"Sols Landscaping did an outstanding job on my landscaping project. I voiced my vision and it was perfecto. They brought my vision to life beyond my expectation. I would highly recommend and continue using Sols Landscaping LLC for all my future projects. Thank you Sols!"

Melissa T on February 2025

Avatar for QScapes Outdoor Solutions, LLC

QScapes Outdoor Solutions, LLC

6500 SH 46 West
4.60(
5
)
•Approved Pro

QScapes Outdoor Solutions, LLC

6500 SH 46 West
4.60(
5
)
•Approved Pro
Customers say: Quick response
289 local quotes requested
7 years of experience

Qscapes Outdoor Solutions is a local, family-owned business that provides quality outdoor solutions around creating, enhancing and maintaining both residential and commercial outdoor spaces. Let's talk about how we can improve your outdoor living experience. Call today 830-500-3044! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

"There were ups and downs, the materials were not adequate"

Warren W on July 2023

Qscapes Outdoor Solutions is a local, family-owned business that provides quality outdoor solutions around creating, enhancing and maintaining both residential and commercial outdoor spaces. Let's talk about how we can improve your outdoor living experience. Call today 830-500-3044! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

"There were ups and downs, the materials were not adequate"

Warren W on July 2023

Avatar for OnCall Home Services

OnCall Home Services

12593 Research Blvd
4.35(
710
)
•Approved Pro

OnCall Home Services

12593 Research Blvd
4.35(
710
)
•Approved Pro
Customers say: Super punctual
754 local quotes requested
27 years of experience

With over 20 years of experience servicing the Austin area, we strive to provide a wide array of high quality, affordable services. We offer home repair, remodeling, make-readies, custom interior and exterior paint, and many other services. Currently, we have five employees, and use professional and licensed subcontractors. ***We offer free estimates, price matching, flexible payment and financing available as well as.*** Call us today for your home repair and remodeling needs! **$500 minimum for labor on Service Calls**

"They did a great job at replacing my roof. Quality of work was great. They also did a great job of cleaning up after."

Brandon H on September 2025

With over 20 years of experience servicing the Austin area, we strive to provide a wide array of high quality, affordable services. We offer home repair, remodeling, make-readies, custom interior and exterior paint, and many other services. Currently, we have five employees, and use professional and licensed subcontractors. ***We offer free estimates, price matching, flexible payment and financing available as well as.*** Call us today for your home repair and remodeling needs! **$500 minimum for labor on Service Calls**

"They did a great job at replacing my roof. Quality of work was great. They also did a great job of cleaning up after."

Brandon H on September 2025

Avatar for Genie Bath Systems

Genie Bath Systems

5680 Randolph Blvd
4.64(
83
)
•Approved Pro

Genie Bath Systems

5680 Randolph Blvd
4.64(
83
)
•Approved Pro
Customers say: Quality work
3135 local quotes requested
12 years of experience

Genie Bath Systems provides homeowners with custom bath remodeling solutions, to include a full-line accessibility needs. All of our products are custom made in the USA. Factory Certified Installation.Lifetime Warranty.100% Financing . PLEASE NOTE: WE DON"T PERFORM KITCHEN REMODELS

"Last October, my sister, an elderly veteran living alone, contracted Genie Bath Systems to remodel her master and guest baths. She was diagnosed cancer and passed before the remodel was complete. Which, to be fair as we were not able to work with Genie while attending to my sister. The contract was expensive. Very expensive. The cost of the remodel is close to 1/4th the value of her home. I noticed there were issues with the remodel that showed a surprising lack of attention to detail. Genie sent people to address the issues twice. Yet issues remain. My calls to my contact at Genie are now being ignored. Also, the only document I have for the remodel is the contract my sister signed. It is not detailed. I have and continue to ask for a breakdown of the cost. An estimate or work order. This request is also being ignored. I am disappointed and have to wonder why Genie will not provide this information. I have several other questions for Genie that I will not go into here. But based on my experience, I cannot recommend Genie. In fact I would warn anyone considering Genie to be very careful about the cost of the contract."

Greg B on May 2025

Genie Bath Systems provides homeowners with custom bath remodeling solutions, to include a full-line accessibility needs. All of our products are custom made in the USA. Factory Certified Installation.Lifetime Warranty.100% Financing . PLEASE NOTE: WE DON"T PERFORM KITCHEN REMODELS

"Last October, my sister, an elderly veteran living alone, contracted Genie Bath Systems to remodel her master and guest baths. She was diagnosed cancer and passed before the remodel was complete. Which, to be fair as we were not able to work with Genie while attending to my sister. The contract was expensive. Very expensive. The cost of the remodel is close to 1/4th the value of her home. I noticed there were issues with the remodel that showed a surprising lack of attention to detail. Genie sent people to address the issues twice. Yet issues remain. My calls to my contact at Genie are now being ignored. Also, the only document I have for the remodel is the contract my sister signed. It is not detailed. I have and continue to ask for a breakdown of the cost. An estimate or work order. This request is also being ignored. I am disappointed and have to wonder why Genie will not provide this information. I have several other questions for Genie that I will not go into here. But based on my experience, I cannot recommend Genie. In fact I would warn anyone considering Genie to be very careful about the cost of the contract."

Greg B on May 2025

Avatar for Expo Home Improvement

Expo Home Improvement

6131 Woodlake Center
4.82(
17
)
•Approved Pro

Expo Home Improvement

6131 Woodlake Center
4.82(
17
)
•Approved Pro
Customers say: Quality work
974 local quotes requested
19 years of experience

Imagine loving every corner of your home. From a kitchen that feels fresh again, to a bathroom that finally works for your family, to windows that keep you comfortable through every Texas season. At Expo Home Improvement, we make remodeling feel simple and rewarding. Our team brings care, craftsmanship, and clear communication to every project, because how we show up matters just as much as what we build. Whether you're in Dallas-Fort Worth, Houston, Austin, San Antonio, or East Texas, we’re just around the corner and ready to help you love where you live. M-39963

"Jordan M. was excellent in skill and service. He arrived on time, got right to work and completed the shower install when he said he would. He was respectful of our home and cleaned up after he was finished. Our new shower is gorgeous! We will highly recommend him."

Lynn B on September 2025

Imagine loving every corner of your home. From a kitchen that feels fresh again, to a bathroom that finally works for your family, to windows that keep you comfortable through every Texas season. At Expo Home Improvement, we make remodeling feel simple and rewarding. Our team brings care, craftsmanship, and clear communication to every project, because how we show up matters just as much as what we build. Whether you're in Dallas-Fort Worth, Houston, Austin, San Antonio, or East Texas, we’re just around the corner and ready to help you love where you live. M-39963

"Jordan M. was excellent in skill and service. He arrived on time, got right to work and completed the shower install when he said he would. He was respectful of our home and cleaned up after he was finished. Our new shower is gorgeous! We will highly recommend him."

Lynn B on September 2025

Avatar for Expo Home Improvement

Expo Home Improvement

13859 Diplomat Dr
4.42(
113
)
•Approved Pro

Expo Home Improvement

13859 Diplomat Dr
4.42(
113
)
•Approved Pro
Customers say: Quality work
2442 local quotes requested
19 years of experience

Imagine loving every corner of your home. From a kitchen that feels fresh again, to a bathroom that finally works for your family, to windows that keep you comfortable through every Texas season. At Expo Home Improvement, we make remodeling feel simple and rewarding. Our team brings care, craftsmanship, and clear communication to every project, because how we show up matters just as much as what we build. Whether you're in Dallas-Fort Worth, Houston, Austin, San Antonio, or East Texas, we’re just around the corner and ready to help you love where you live. M-39963

"The Expo home came out, and they installed a step-in shower for the family; their work was excellent. We worked with Da'Monte, Kawin, and John, and they were very professional. We would recommend them to anyone needing this type of service."

Geri H on July 2025

Imagine loving every corner of your home. From a kitchen that feels fresh again, to a bathroom that finally works for your family, to windows that keep you comfortable through every Texas season. At Expo Home Improvement, we make remodeling feel simple and rewarding. Our team brings care, craftsmanship, and clear communication to every project, because how we show up matters just as much as what we build. Whether you're in Dallas-Fort Worth, Houston, Austin, San Antonio, or East Texas, we’re just around the corner and ready to help you love where you live. M-39963

"The Expo home came out, and they installed a step-in shower for the family; their work was excellent. We worked with Da'Monte, Kawin, and John, and they were very professional. We would recommend them to anyone needing this type of service."

Geri H on July 2025

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

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, TX 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.

See all articles
  • 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.