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Find Addition to existing structure builders in Annandale

Avatar for 3D Design Space

3D Design Space

5.00(
16
)
Approved Pro

3D Design Space

5.00(
16
)
Approved Pro
Customers say: Quality work
33 years of experience
Free onsite estimate

3D Design Space was established in 1992 Specializing in Additions, Major Renovations, Bathroom, Kitchen, Basement, Garage Remodels, design, and architectural services in Northern Virginia. Quality customer service and workmanship is a number one priority of 3D Design Space. We are fully insured and licensed.

"An amazing, super nice guy to work with...great communication and design ideas. I've never seen someone (and his crew) work so hard to complete a job! I would hire again in a heartbeat."

Melissa E on July 2015

3D Design Space was established in 1992 Specializing in Additions, Major Renovations, Bathroom, Kitchen, Basement, Garage Remodels, design, and architectural services in Northern Virginia. Quality customer service and workmanship is a number one priority of 3D Design Space. We are fully insured and licensed.

"An amazing, super nice guy to work with...great communication and design ideas. I've never seen someone (and his crew) work so hard to complete a job! I would hire again in a heartbeat."

Melissa E on July 2015


Avatar for Eco Power Works

Eco Power Works

5.00(
4
)
Approved Pro

Eco Power Works

5.00(
4
)
Approved Pro
19 years of experience
Free onsite estimate

A leading construction company in Northern VA focuses on providing optimum quality in various construction services. We take great pride in our work as we have during our 20+ years in business. Thus, you can rest assured, that no matter what construction project we handle, we will be giving nothing but highly professional and expert works. Our galleries collections of photos from previous construction projects can attest to the amount of time, thought, and effort that we put into the services we provide.

"Eco Power Works did a great job on my kitchen and bathroom renovation ! Daryl and John were very patient listening to my ideas. They brought in an architect who was reasonably priced and made suggestions to overall designs which I am so glad they did ! The project from Start to finish was on schedule which O was pleasantly surprised - these guys kept their words and their workers were always on time respectful of my property and time. I like that they always checked with me when they took major steps to double check that everyone was on the same page - they communicated every step of the way and were very careful to to do the job right. I really love the beautiful cabinets and marble countertops which were my dreams. I am so glad I hired these guys - they really did a great job overall - will definitely recommend them to my friends and neighbors !"

Jane _ on April 2025

A leading construction company in Northern VA focuses on providing optimum quality in various construction services. We take great pride in our work as we have during our 20+ years in business. Thus, you can rest assured, that no matter what construction project we handle, we will be giving nothing but highly professional and expert works. Our galleries collections of photos from previous construction projects can attest to the amount of time, thought, and effort that we put into the services we provide.

"Eco Power Works did a great job on my kitchen and bathroom renovation ! Daryl and John were very patient listening to my ideas. They brought in an architect who was reasonably priced and made suggestions to overall designs which I am so glad they did ! The project from Start to finish was on schedule which O was pleasantly surprised - these guys kept their words and their workers were always on time respectful of my property and time. I like that they always checked with me when they took major steps to double check that everyone was on the same page - they communicated every step of the way and were very careful to to do the job right. I really love the beautiful cabinets and marble countertops which were my dreams. I am so glad I hired these guys - they really did a great job overall - will definitely recommend them to my friends and neighbors !"

Jane _ on April 2025


Avatar for Character Companies, Inc.

Character Companies, Inc.

4.00(
4
)
Approved Pro

Character Companies, Inc.

4.00(
4
)
Approved Pro
Customers say: True professional
7 years of experience
Free onsite estimate

Character Companies: Crafting Excellence in Construction The driving force behind Character Companies dedicated to a reputation for turning construction dreams into reality. At Character Companies we don't just build; we craft. Our unwavering commitment to precision, innovation, and superior craftsmanship has made us the trusted choice for residential and commercial construction projects in Alexandria, VA and beyond. From homes to renovations and expansions, our residential expertise brings your vision to life, ensuring perfection in every detail. Our portfolio includes, kitchens, bathrooms, house renovations, and home additions - delivered on time and within budget. Our projects are tailored to meet your needs ensures that each project reflects your vision and specifications. With 7 years of industry experience, Character Companies brings unparalleled expertise to every project.

"We recently had the unfortunate experience of working with Character Companies Inc., and as government civil servants and veterans, we were deeply disappointed. The price of renovating two bathrooms and installing new LVP flooring at $70K (original quote: $84K) seemed excessive, but we hoped that the quality of service would justify the cost. Sadly, that was not the case, and it has cost us the chance to rent out our home while we are deployed to Iraq. From start to finish, the experience was a nightmare. The project management was abysmal, with multiple delays that extended the timeline one month beyond the agreed schedule. It took over two months to do just two bathrooms and replace flooring when the original timeline was four weeks. This company demonstrated a shocking lack of professionalism and accountability throughout the process. The design work was utterly incompetent, failing to conform to the existing plumbing structure in our bathrooms. The contractor disregarded our repeated attempts to bring attention to design flaws and forced the installation of bathroom vanities by performing a â carpentry fixâ that left us with two top drawers sealed shut, one bottom drawer with a cutout, and one fully functional drawer. One month after installation, one vanity separated from the wall and had to be reattached. Our allegations of Character charging us for high-end fixtures and installing cheaper ones were ignored. The final straw was the damage done to our marble floors. Instead of offering a repair or replacement, the contractor covered it with LVP and then charged us at the end of the project for the extra costs of the LVP that they incurred to cover up the damage! This was deceitful and completely unacceptable. The CEOâ s disregard for customer satisfaction and maintaining basic work standards is unforgivable. The only thing he did well was apologize profusely, not caring about fixing any problems. During a phone call, he admitted that our project was a â dumpster fireâ yet didnâ t offer any concessions. We strongly advise anyone considering Character Companies Inc. to stay far away. Their poor project management, substandard design, shoddy craftsmanship, and unprofessional conduct have left us with a costly mess that will take more time and money to fix. Protect yourself and go with an experienced, reputable company."

CHAD P on August 2024

Character Companies: Crafting Excellence in Construction The driving force behind Character Companies dedicated to a reputation for turning construction dreams into reality. At Character Companies we don't just build; we craft. Our unwavering commitment to precision, innovation, and superior craftsmanship has made us the trusted choice for residential and commercial construction projects in Alexandria, VA and beyond. From homes to renovations and expansions, our residential expertise brings your vision to life, ensuring perfection in every detail. Our portfolio includes, kitchens, bathrooms, house renovations, and home additions - delivered on time and within budget. Our projects are tailored to meet your needs ensures that each project reflects your vision and specifications. With 7 years of industry experience, Character Companies brings unparalleled expertise to every project.

"We recently had the unfortunate experience of working with Character Companies Inc., and as government civil servants and veterans, we were deeply disappointed. The price of renovating two bathrooms and installing new LVP flooring at $70K (original quote: $84K) seemed excessive, but we hoped that the quality of service would justify the cost. Sadly, that was not the case, and it has cost us the chance to rent out our home while we are deployed to Iraq. From start to finish, the experience was a nightmare. The project management was abysmal, with multiple delays that extended the timeline one month beyond the agreed schedule. It took over two months to do just two bathrooms and replace flooring when the original timeline was four weeks. This company demonstrated a shocking lack of professionalism and accountability throughout the process. The design work was utterly incompetent, failing to conform to the existing plumbing structure in our bathrooms. The contractor disregarded our repeated attempts to bring attention to design flaws and forced the installation of bathroom vanities by performing a â carpentry fixâ that left us with two top drawers sealed shut, one bottom drawer with a cutout, and one fully functional drawer. One month after installation, one vanity separated from the wall and had to be reattached. Our allegations of Character charging us for high-end fixtures and installing cheaper ones were ignored. The final straw was the damage done to our marble floors. Instead of offering a repair or replacement, the contractor covered it with LVP and then charged us at the end of the project for the extra costs of the LVP that they incurred to cover up the damage! This was deceitful and completely unacceptable. The CEOâ s disregard for customer satisfaction and maintaining basic work standards is unforgivable. The only thing he did well was apologize profusely, not caring about fixing any problems. During a phone call, he admitted that our project was a â dumpster fireâ yet didnâ t offer any concessions. We strongly advise anyone considering Character Companies Inc. to stay far away. Their poor project management, substandard design, shoddy craftsmanship, and unprofessional conduct have left us with a costly mess that will take more time and money to fix. Protect yourself and go with an experienced, reputable company."

CHAD P on August 2024


Moses Housing LLC

4.94(
8
)
Approved Pro

Moses Housing LLC

4.94(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
5 years of experience

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.

"They replaced my beaten wooden deck with a new composite one. The price was more than fair after shopping around. What I liked from the experience was the cleanliness and speed. Everything we agreed on they did in timely manner."

Charlie H on October 2023

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.

"They replaced my beaten wooden deck with a new composite one. The price was more than fair after shopping around. What I liked from the experience was the cleanliness and speed. Everything we agreed on they did in timely manner."

Charlie H on October 2023


HW Mechanical and Remodeling

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

HW Mechanical and Remodeling

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
15 years of experience
Free onsite estimate

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. 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.

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. 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.


Avatar for ICM Remodeling / ICM Building & Remodeling, LLC

ICM Remodeling / ICM Building & Remodeling, LLC

5.00(
21
)
Approved Pro

ICM Remodeling / ICM Building & Remodeling, LLC

5.00(
21
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
45 local quotes requested

Serving and operating for over a decade in the District of Columbia & Northern V.A. ICM Building & Remodeling, LLC is dedicated to served homeowners with their Home Remodeling projects with a complimentary personalized guidance through the whole process of the project, wether big or small, for sure we'll be there from the beginning to end. Dealing directly with me and my team, will give you the peace of mind you MUST have to make the right decisions, this is our Priceless guarantee we'll give you in addition to the profesionalism we'll handle your business. Keep in mind, for us our clients mean more than 1 (One) deal, for us they mean a long lasting relationship. Thank you for considering us help with your home improvement dreams! Israel Clavijo-President and Owner of ICM Building & Remodeling Family owned, Licensed, Bonded, Insured Company.

"I would like to provide my evaluation of being happy that ICM with remodeling my home, The best I've experienced. The work was professionaly performed, I am pleased, and extremely willing to highly recommend ICM's for services to customers. Because ICM Building & Remodeling, my family appreciates your business. I will render my support for ICM to ensure customers are pleased. As a satisfied customer, it means the world to my family for ICM's and staffs outstanding work, a job well done. Bill Roper Springfield, VA"

William R on January 2025

Serving and operating for over a decade in the District of Columbia & Northern V.A. ICM Building & Remodeling, LLC is dedicated to served homeowners with their Home Remodeling projects with a complimentary personalized guidance through the whole process of the project, wether big or small, for sure we'll be there from the beginning to end. Dealing directly with me and my team, will give you the peace of mind you MUST have to make the right decisions, this is our Priceless guarantee we'll give you in addition to the profesionalism we'll handle your business. Keep in mind, for us our clients mean more than 1 (One) deal, for us they mean a long lasting relationship. Thank you for considering us help with your home improvement dreams! Israel Clavijo-President and Owner of ICM Building & Remodeling Family owned, Licensed, Bonded, Insured Company.

"I would like to provide my evaluation of being happy that ICM with remodeling my home, The best I've experienced. The work was professionaly performed, I am pleased, and extremely willing to highly recommend ICM's for services to customers. Because ICM Building & Remodeling, my family appreciates your business. I will render my support for ICM to ensure customers are pleased. As a satisfied customer, it means the world to my family for ICM's and staffs outstanding work, a job well done. Bill Roper Springfield, VA"

William R on January 2025


Avatar for All Renovations Inc

All Renovations Inc

4.69(
110
)
Approved Pro

All Renovations Inc

4.69(
110
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
20 local quotes requested

All Renovations was started by a local graduate of George Washington University. We are fully licensed in all trade work including building, electrical and plumbing . We have always put our customers first in delivering what we promise without any gimmicks. The reputation of our company is proven through our satisfactory track record including winning the highly coveted Angie’s List Super Service Award and being selected as a Best Pick Report contractor on numerous occasions. The staff at our company values your time with prompt on site visits, quick turnaround in providing cost estimates, and a responsive attitude until job completion. We can assure you that our pricing and written warranty provides value in your investment when compared with other professionally licensed contractors. Due to our staffing requirements we are only able to take on jobs $10k or higher.

"I am giving All Renovations 5 stars for the basement renovation in large part because of Adrian’s excellent craftsmanship and attention to detail. Our job was pretty extensive. It included moving support columns, demo and rebuild exterior stairway, adding a full bath, extending the finished/framed portion of the basement, moving the circuit-breaker panel, and re-doing our half-bath. The job took 6 months, which was about twice as long as we expected. Omar was always very responsive and provided good feedback. Adrian is very good at explaining things and soliciting your input when options/alternatives exist. He definitely does not take short-cuts if quality would suffer. He is also very considerate/careful inside your home and cleans-up after himself. Our $102k project ballooned to $125k, mostly due to nice to have add-ons and unforeseen issues. But there were several items I feel should have been caught at the contract onset. E.g. the need for a floor drain ($900), considering that we were getting rid of the utility sink basin. There was also an extra $4k to replace the drywall in the half bath since the existing paint was too textured (sponge) to paint over. But we were very pleased with the outcome and would definitely recommend All Renovations."

Shane G on March 2025

All Renovations was started by a local graduate of George Washington University. We are fully licensed in all trade work including building, electrical and plumbing . We have always put our customers first in delivering what we promise without any gimmicks. The reputation of our company is proven through our satisfactory track record including winning the highly coveted Angie’s List Super Service Award and being selected as a Best Pick Report contractor on numerous occasions. The staff at our company values your time with prompt on site visits, quick turnaround in providing cost estimates, and a responsive attitude until job completion. We can assure you that our pricing and written warranty provides value in your investment when compared with other professionally licensed contractors. Due to our staffing requirements we are only able to take on jobs $10k or higher.

"I am giving All Renovations 5 stars for the basement renovation in large part because of Adrian’s excellent craftsmanship and attention to detail. Our job was pretty extensive. It included moving support columns, demo and rebuild exterior stairway, adding a full bath, extending the finished/framed portion of the basement, moving the circuit-breaker panel, and re-doing our half-bath. The job took 6 months, which was about twice as long as we expected. Omar was always very responsive and provided good feedback. Adrian is very good at explaining things and soliciting your input when options/alternatives exist. He definitely does not take short-cuts if quality would suffer. He is also very considerate/careful inside your home and cleans-up after himself. Our $102k project ballooned to $125k, mostly due to nice to have add-ons and unforeseen issues. But there were several items I feel should have been caught at the contract onset. E.g. the need for a floor drain ($900), considering that we were getting rid of the utility sink basin. There was also an extra $4k to replace the drywall in the half bath since the existing paint was too textured (sponge) to paint over. But we were very pleased with the outcome and would definitely recommend All Renovations."

Shane G on March 2025


"The work was done professionally to the highest degree. We were extremely pleased and totally satisfied. Without question they were my first choice for the next home project"

Neal C on April 2024

Remodeling business locally owned and operated we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

"The work was done professionally to the highest degree. We were extremely pleased and totally satisfied. Without question they were my first choice for the next home project"

Neal C on April 2024


Simmons Home Improvement LLC

4.93(
84
)
Approved Pro

Simmons Home Improvement LLC

4.93(
84
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
39 local quotes requested

From start to finish, we have you covered from home repairs, to remodeling! TV wall/ceiling mounts, furniture assembly, toilet installs, flooring, drywall, painting and more! 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 a free estimate today!

"Excellent customer service and assisted with design of the projects."

Terri H on November 2025

From start to finish, we have you covered from home repairs, to remodeling! TV wall/ceiling mounts, furniture assembly, toilet installs, flooring, drywall, painting and more! 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 a free estimate today!

"Excellent customer service and assisted with design of the projects."

Terri H on November 2025


Avatar for Ascend Contracting

Ascend Contracting

4.93(
14
)
Approved Pro

Ascend Contracting

4.93(
14
)
Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
12 local quotes requested

At Ascend Contracting /DBA (Home Run Builder), we take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers 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 and friendly manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"It was a pleasure working with Hamid and his team. Their work was very professional and within budget. I greatly appreciated that we could collaborate on my project discussing different materials and looks that, when finished, exceeded my expectations. I couldn't possibly be more satisfied and highly recommend HRB."

William T on January 2024

At Ascend Contracting /DBA (Home Run Builder), we take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers 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 and friendly manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"It was a pleasure working with Hamid and his team. Their work was very professional and within budget. I greatly appreciated that we could collaborate on my project discussing different materials and looks that, when finished, exceeded my expectations. I couldn't possibly be more satisfied and highly recommend HRB."

William T on January 2024

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FAQs for addition to existing structure building service projects in Annandale, VA

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 Annandale, VA 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.