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Find Addition to existing structure builders in Greenbelt

Avatar for GaaJ

GaaJ

11711 Ash Rd
5.00(
2
)
•Approved Pro

GaaJ

11711 Ash Rd
5.00(
2
)
•Approved Pro
Customers say: Quick response
19 years of experience
Free onsite estimate

We're 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 Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"GAAJ’s team were truly professionals. They listened to our needs and made my grandmother’s vision of a room, a reality. They were passionate and went above and beyond with details on the construction. If you have any building needs, I highly recommend GAAJ!"

Stephanie K on August 2025

We're 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 Home Improvement services that are customizable to each individual project. We specialize in Additions and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"GAAJ’s team were truly professionals. They listened to our needs and made my grandmother’s vision of a room, a reality. They were passionate and went above and beyond with details on the construction. If you have any building needs, I highly recommend GAAJ!"

Stephanie K on August 2025

Krause Design & Construction, Inc.

2513 McComas Avenue
4.94(
3
)
•Approved Pro

Krause Design & Construction, Inc.

2513 McComas Avenue
4.94(
3
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
40 years of experience

Krause Design & Construction, Inc. is one of the area's elite high-end home improvement experts, currently specializing in an array of expertise for all of your addition needs. We are a family owned and operated business with decades worth of experience in the industry and are considered by many to be masters within our field. We can either provide the concept for your project, or breathe life into your own vision, thereby creating a true marveled work of beauty. Regardless of the size and scope of your project, we will employ our unique skill set to see your project through fruition. We will treat your property with the same personal degree of care and consideration that we utilize when working on our own properties. We have satisfied repeat customers that routinely call us for new projects. We are always looking for new clients. Feel free to contact us to schedule an initial consultation, we are more than happy to meet with you and discuss your project today!

"You will not be disappointed by Krause Design & Construction. This is a phenomenal company run by an honest, talented, skilled and experienced businessman. No horror stories, no regrets. Krause built what we asked for and stayed on budget and on schedule. Just hire Krause and you will not be disappointed!"

Vince B on May 2016

Krause Design & Construction, Inc. is one of the area's elite high-end home improvement experts, currently specializing in an array of expertise for all of your addition needs. We are a family owned and operated business with decades worth of experience in the industry and are considered by many to be masters within our field. We can either provide the concept for your project, or breathe life into your own vision, thereby creating a true marveled work of beauty. Regardless of the size and scope of your project, we will employ our unique skill set to see your project through fruition. We will treat your property with the same personal degree of care and consideration that we utilize when working on our own properties. We have satisfied repeat customers that routinely call us for new projects. We are always looking for new clients. Feel free to contact us to schedule an initial consultation, we are more than happy to meet with you and discuss your project today!

"You will not be disappointed by Krause Design & Construction. This is a phenomenal company run by an honest, talented, skilled and experienced businessman. No horror stories, no regrets. Krause built what we asked for and stayed on budget and on schedule. Just hire Krause and you will not be disappointed!"

Vince B on May 2016

Avatar for EnviroBuild Construction

EnviroBuild Construction

2257 Lewis Ave
5.00(
2
)
•Approved Pro

EnviroBuild Construction

2257 Lewis Ave
5.00(
2
)
•Approved Pro
5 years of experience
Free onsite estimate

EnviroBuild Construction is a premier construction company dedicated to delivering exceptional residential building services. We specialize in custom home building, where we work closely with clients to transform their dream homes into reality. Our expertise extends to comprehensive remodeling projects, from kitchen and bathroom renovations to whole-house transformations. We also excel in adding living space and functionality to existing homes through our skilled addition services. At EnviroBuild, we prioritize sustainable building practices, incorporating eco-friendly materials and energy-efficient solutions whenever possible. We are committed to exceeding client expectations with meticulous attention to detail, superior craftsmanship, and a focus on building lasting relationships.

"I will begin from the end-HIRE THEM! We have been using EnviroBuild’s services for the last 10 years, since purchasing our house. They serviced us in 4 different projects, in which the last one was after a tree fell on our house. They came and start assisting us even prior to the insurance providing approval by covering the roof and getting someone to clear the large tree debris. They negotiated with the insurance and made sure that we will receive ALL we need to be done to include permits and inspections. Once the work started it was quick, efficient, professional and with absolutely amazing results. We will definitely recommend them to anyone who is interested in a work to be done in their home."

Dvir B on February 2025

EnviroBuild Construction is a premier construction company dedicated to delivering exceptional residential building services. We specialize in custom home building, where we work closely with clients to transform their dream homes into reality. Our expertise extends to comprehensive remodeling projects, from kitchen and bathroom renovations to whole-house transformations. We also excel in adding living space and functionality to existing homes through our skilled addition services. At EnviroBuild, we prioritize sustainable building practices, incorporating eco-friendly materials and energy-efficient solutions whenever possible. We are committed to exceeding client expectations with meticulous attention to detail, superior craftsmanship, and a focus on building lasting relationships.

"I will begin from the end-HIRE THEM! We have been using EnviroBuild’s services for the last 10 years, since purchasing our house. They serviced us in 4 different projects, in which the last one was after a tree fell on our house. They came and start assisting us even prior to the insurance providing approval by covering the roof and getting someone to clear the large tree debris. They negotiated with the insurance and made sure that we will receive ALL we need to be done to include permits and inspections. Once the work started it was quick, efficient, professional and with absolutely amazing results. We will definitely recommend them to anyone who is interested in a work to be done in their home."

Dvir B on February 2025

Avatar for Masonry Stonework

Masonry Stonework

12312 Garrison Forest Rd
5.00(
3
)
•Approved Pro

Masonry Stonework

12312 Garrison Forest Rd
5.00(
3
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
12 years of experience

We are a locally owned and operated company with over 22 years of industry experience. We value honesty and integrity in all aspects of our business. We offer a variety of Home Improvement services that are customizable to each individual project. We specialize in handyman/carpentry work and a variety of related service and repair projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"Great service and good work!"

Franklin F on February 2023

We are a locally owned and operated company with over 22 years of industry experience. We value honesty and integrity in all aspects of our business. We offer a variety of Home Improvement services that are customizable to each individual project. We specialize in handyman/carpentry work and a variety of related service and repair projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

"Great service and good work!"

Franklin F on February 2023

Val-U-Homes, LLC

2 Stoneyhurst Court
5.00(
20
)
•Approved Pro

Val-U-Homes, LLC

2 Stoneyhurst Court
5.00(
20
)
•Approved Pro
Customers say: Terrific value
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
39 local quotes requested

Val-U-Homes, LLC, specializes in home Additions and remodeling in Montgomery County and the surrounding areas. We take pride in providing new home quality on all of our projects

"I hired them for home renovation, and they did a great job. They were very respectful and understanding. When they were done everything turned out great!"

Mistere F on July 2024

Val-U-Homes, LLC, specializes in home Additions and remodeling in Montgomery County and the surrounding areas. We take pride in providing new home quality on all of our projects

"I hired them for home renovation, and they did a great job. They were very respectful and understanding. When they were done everything turned out great!"

Mistere F on July 2024

Avatar for East Coast Concrete LLC

East Coast Concrete LLC

7310 Ritchie Highway, Suite 200
3.50(
11
)
•Approved Pro

East Coast Concrete LLC

7310 Ritchie Highway, Suite 200
3.50(
11
)
•Approved Pro
1 years of experience
Free onsite estimate

East Coast Concrete LLC, proudly servicing Pasadena, MD and the surrounding areas. Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers that we serve. We look forward to serving you. Call us today! You will not be disappointed.

"Very fast service awesome material selection clean work and amazing price and Jennifer was a pleasure to work with schedule all our work."

Jake M on January 2025

East Coast Concrete LLC, proudly servicing Pasadena, MD and the surrounding areas. Our goal is to complete your project to perfection. We look forward to building long lasting relationships with the customers that we serve. We look forward to serving you. Call us today! You will not be disappointed.

"Very fast service awesome material selection clean work and amazing price and Jennifer was a pleasure to work with schedule all our work."

Jake M on January 2025

Avatar for Elevate Design Build, LLC

Elevate Design Build, LLC

1742 Underwood Rd
4.80(
25
)
•Approved Pro

Elevate Design Build, LLC

1742 Underwood Rd
4.80(
25
)
•Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
31 local quotes requested

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"All the people at Elevate Design and Build were amazing and a pleasure to work with. We doubled the size of our house including tripling the size of the kitchen, knocking out walls to create an open floor plan and added a three car garage with home office over the garage. They even recommended modifications to our original blueprints which were excellent. All their workers friendly and did a first class job. Went totally above and beyond our expectations. One year later we have not had one single problem with any of the work. Total integrity. If any issue came up, the company absorbed the cost - not the customer. Everything they did was done perfectly. We didn't have a single issue or complaint during the entire process. I give them my highest personal recommendation. I would never use anyone else."

Stephen M on August 2024

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"All the people at Elevate Design and Build were amazing and a pleasure to work with. We doubled the size of our house including tripling the size of the kitchen, knocking out walls to create an open floor plan and added a three car garage with home office over the garage. They even recommended modifications to our original blueprints which were excellent. All their workers friendly and did a first class job. Went totally above and beyond our expectations. One year later we have not had one single problem with any of the work. Total integrity. If any issue came up, the company absorbed the cost - not the customer. Everything they did was done perfectly. We didn't have a single issue or complaint during the entire process. I give them my highest personal recommendation. I would never use anyone else."

Stephen M on August 2024

Avatar for PRECISION CRAFT CONTRACTORS LLC

PRECISION CRAFT CONTRACTORS LLC

282A North Dr.
5.00(
15
)
•Approved Pro

PRECISION CRAFT CONTRACTORS LLC

282A North Dr.
5.00(
15
)
•Approved Pro
Customers say: Quick response
Free onsite estimate

PRECISION CRAFT CONTRACTORS LLC Is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have hands on experience, to provide innovative ideas and suggestions tailored to your projects. We offer very competitive pricing that is reasonable and fair. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"The scope of the project - a relatively small one for a big contractor- included power washing and leveling the flagstone pavers around the pool and cleaning/repairing the pavers on the driveway and the access path in the backyard. As the work progressed, we realized that significantly more pavers were needed than we and the contractor had anticipated and that a change order was required. Precision Craft handled the original project and the change order professionally, with attention to details and with concern for our budget. The project was thus completed as scheduled and within the (revised) budget."

Alberto d on September 2025

PRECISION CRAFT CONTRACTORS LLC Is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have hands on experience, to provide innovative ideas and suggestions tailored to your projects. We offer very competitive pricing that is reasonable and fair. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"The scope of the project - a relatively small one for a big contractor- included power washing and leveling the flagstone pavers around the pool and cleaning/repairing the pavers on the driveway and the access path in the backyard. As the work progressed, we realized that significantly more pavers were needed than we and the contractor had anticipated and that a change order was required. Precision Craft handled the original project and the change order professionally, with attention to details and with concern for our budget. The project was thus completed as scheduled and within the (revised) budget."

Alberto d on September 2025

Avatar for Design Kitchen and Bath, LLC

Design Kitchen and Bath, LLC

8450 Baltimore National Pike Suite 150
4.83(
6
)
•Approved Pro

Design Kitchen and Bath, LLC

8450 Baltimore National Pike Suite 150
4.83(
6
)
•Approved Pro
50 local quotes requested
9 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.

"Design Kitchen and Bath exceeded our expectations with our master bathroom remodel. My project manager, Atakan, was professional, detail-focused, and brought our vision to life with stunning craftsmanship. They stayed on schedule and within budget, making the entire process seamless. Highly recommend!"

Marie S on January 2025

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.

"Design Kitchen and Bath exceeded our expectations with our master bathroom remodel. My project manager, Atakan, was professional, detail-focused, and brought our vision to life with stunning craftsmanship. They stayed on schedule and within budget, making the entire process seamless. Highly recommend!"

Marie S on January 2025

Avatar for John James Properties

John James Properties

7230 Lee Deforest Dr. Ste 202
4.74(
25
)
•Approved Pro

John James Properties

7230 Lee Deforest Dr. Ste 202
4.74(
25
)
•Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
11 local quotes requested

Our company is based on the belief that our customers needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team.

"Contractor delivered what he promised on time. Very satisfied with the result."

John D on April 2023

Our company is based on the belief that our customers needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team.

"Contractor delivered what he promised on time. Very satisfied with the result."

John D on April 2023

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FAQs for addition to existing structure building service projects in Greenbelt, MD

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 Greenbelt, MD 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
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