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Addition to existing structure builders in Leesburg

Avatar for National Home Design and Build, LLC
National Home Design and Build, LLC
611 S Carlin Springs Rd #512
5.00(
6
)
Approved Pro
National Home Design and Build, LLC
611 S Carlin Springs Rd #512
5.00(
6
)
Approved Pro
Free onsite estimate
Emergency services offered

For many years, we have been providing unique high-performance work in Build new homes, Home additions, Kitchen remodeling, Bathroom remodeling, Basement remodeling, Outdoor living spaces, Screened Porches, Custom new garages, Sunrooms and Major Home renovations.

" I had an amazing experience with Nationals Home Design! They helped me expand both my kitchen and living room area, and the results exceeded my expectations. Patrick was especially impressive?he showed up every single day to ensure the project was progressing smoothly and efficiently. His dedication and attention to detail really set the tone for the whole team. I?m already planning to finish my basement soon, and I will absolutely be using Nationals Home Design again. I highly recommend them to anyone looking for a reliable, professional, and hands-on renovation company!"

Ari C on June 2025

For many years, we have been providing unique high-performance work in Build new homes, Home additions, Kitchen remodeling, Bathroom remodeling, Basement remodeling, Outdoor living spaces, Screened Porches, Custom new garages, Sunrooms and Major Home renovations.

" I had an amazing experience with Nationals Home Design! They helped me expand both my kitchen and living room area, and the results exceeded my expectations. Patrick was especially impressive?he showed up every single day to ensure the project was progressing smoothly and efficiently. His dedication and attention to detail really set the tone for the whole team. I?m already planning to finish my basement soon, and I will absolutely be using Nationals Home Design again. I highly recommend them to anyone looking for a reliable, professional, and hands-on renovation company!"

Ari C on June 2025


Moses Housing LLC
2753 Sutton Rd
4.94(
8
)
Approved Pro
Moses Housing LLC
2753 Sutton Rd
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


Avatar for EMSI Engineering, Inc.
EMSI Engineering, Inc.
9110 Railroad Drive, Suite 310A
4.00(
4
)
Approved Pro
EMSI Engineering, Inc.
9110 Railroad Drive, Suite 310A
4.00(
4
)
Approved Pro
Customers say: Quick response
38 years of experience
Emergency services offered

At EMSI Engineering Inc., we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts, and will always keep you educated about the work process. We look forward to earning your business!

"In 2022, we had EMSI build an addition. In Jan we asked our kitchen contractor to check the mudroom flooring because it felt unstable. EMSI had tried to level the mudroom flooring using random pieces of plywood (see attached photos). Even worse is the job they did in our powder room connected to the mudroom. When the team pulled up the mudroom flooring to see the plywood they noticed some mold in powder room. The toilet in the powder room was installed incorrectly, had been leaking into the insulation for the last 2 years, and the insulation was full of mold. All of the mudroom insulation and flooring had to be replaced and the toilet reinstalled. I sent the photos to EMSI. No one responded. The EMSI team's shoddy construction put my kids' health and safety at risk. Worse, they don't seem to care as they have never responded to my emails. Do not work with this team under any circumstances."

Joy O on February 2025

At EMSI Engineering Inc., we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts, and will always keep you educated about the work process. We look forward to earning your business!

"In 2022, we had EMSI build an addition. In Jan we asked our kitchen contractor to check the mudroom flooring because it felt unstable. EMSI had tried to level the mudroom flooring using random pieces of plywood (see attached photos). Even worse is the job they did in our powder room connected to the mudroom. When the team pulled up the mudroom flooring to see the plywood they noticed some mold in powder room. The toilet in the powder room was installed incorrectly, had been leaking into the insulation for the last 2 years, and the insulation was full of mold. All of the mudroom insulation and flooring had to be replaced and the toilet reinstalled. I sent the photos to EMSI. No one responded. The EMSI team's shoddy construction put my kids' health and safety at risk. Worse, they don't seem to care as they have never responded to my emails. Do not work with this team under any circumstances."

Joy O on February 2025


Avatar for 3D Design Space
3D Design Space
6435 Lincolnia Road
5.00(
16
)
Approved Pro
3D Design Space
6435 Lincolnia Road
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


HW Mechanical and Remodeling
65 Richland Rd
New on HomeAdvisorNew on Angi
Approved Pro
HW Mechanical and Remodeling
65 Richland Rd
New on AngiNew 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 Alltecs, LLC
Alltecs, LLC
1800 Diagonal Rd Ste 600
3.75(
14
)
Approved Pro
Alltecs, LLC
1800 Diagonal Rd Ste 600
3.75(
14
)
Approved Pro
Customers say: Terrific value
10 years of experience
Free onsite estimate

At Alltecs, we are a leading minority-owned construction firm dedicated to delivering exceptional residential and commercial construction services throughout the DC area. With a strong commitment to professionalism, integrity, quality, and service, we have established ourselves as a trusted name in the industry. Our company was founded with a vision to provide top-notch construction solutions that exceed our clients' expectations. We understand that every project is unique, and our team of skilled professionals brings a wealth of expertise and experience to every endeavor. From concept to completion, we strive for excellence and ensure that each project is executed with meticulous attention to detail.

"This company gets a 0 rating from me. My experience with Alltecs was terrible please do you research on this company before hiring them I even encourage you to go and physically see work that they have done instead of relying on their photos. I would never recommend their company for anything. I hired Alltecs for a 203K rehab July 2021 by March 2023 they quit and nothing was completed in my house. Alltecs had already been paid a substantial amount of money, for a totally f....ed up job and to add Insult to injury Dawnta Million filed a Mechanics Lien on my property in which he never enforced. The nerve of somebody who don't pay his subcontractors (found that out later) so please please please don't get defrauded by Alltecs like I did."

Karma K on May 2025

At Alltecs, we are a leading minority-owned construction firm dedicated to delivering exceptional residential and commercial construction services throughout the DC area. With a strong commitment to professionalism, integrity, quality, and service, we have established ourselves as a trusted name in the industry. Our company was founded with a vision to provide top-notch construction solutions that exceed our clients' expectations. We understand that every project is unique, and our team of skilled professionals brings a wealth of expertise and experience to every endeavor. From concept to completion, we strive for excellence and ensure that each project is executed with meticulous attention to detail.

"This company gets a 0 rating from me. My experience with Alltecs was terrible please do you research on this company before hiring them I even encourage you to go and physically see work that they have done instead of relying on their photos. I would never recommend their company for anything. I hired Alltecs for a 203K rehab July 2021 by March 2023 they quit and nothing was completed in my house. Alltecs had already been paid a substantial amount of money, for a totally f....ed up job and to add Insult to injury Dawnta Million filed a Mechanics Lien on my property in which he never enforced. The nerve of somebody who don't pay his subcontractors (found that out later) so please please please don't get defrauded by Alltecs like I did."

Karma K on May 2025


Avatar for Kozan Construction, LLC
Kozan Construction, LLC
4584 Cornell Drive
4.74(
27
)
Approved Pro
Kozan Construction, LLC
4584 Cornell Drive
4.74(
27
)
Approved Pro
Customers say: True professional
17 local quotes requested
40 years of experience

We have over 10 years of experience in the business. Here at Kozan Construction, LLC, 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!

"The original project I hired them for was to replace leaky faucets in both the kitchen and bathroom. Frank, the owner, was responsive and professional. They scheduled the work promptly and showed up on time. Unexpected issues were discovered that required a second trip and additional work. They communicated everything clearly and the additional costs were handled separately and transparently. They also cleaned up after the work was done. I would hire them again."

Ruxandra B on June 2025

We have over 10 years of experience in the business. Here at Kozan Construction, LLC, 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!

"The original project I hired them for was to replace leaky faucets in both the kitchen and bathroom. Frank, the owner, was responsive and professional. They scheduled the work promptly and showed up on time. Unexpected issues were discovered that required a second trip and additional work. They communicated everything clearly and the additional costs were handled separately and transparently. They also cleaned up after the work was done. I would hire them again."

Ruxandra B on June 2025


Avatar for Keraman Construction Company
Keraman Construction Company
3920 Silk Tree Ct
4.67(
9
)
Approved Pro
Keraman Construction Company
3920 Silk Tree Ct
4.67(
9
)
Approved Pro
Super Service Award
Customers say: True professional
74 local quotes requested
24 years of experience

Welcome to Keraman Construction Company! We take pride in the quality of work and customer satisfaction that we give each and every customer! We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you!

"Very fast and effective service."

Jason W on March 2025

Welcome to Keraman Construction Company! We take pride in the quality of work and customer satisfaction that we give each and every customer! We are known to pay exquisite attention to detail while making customer satisfaction our top priority. Call us today to learn more about how we can help you!

"Very fast and effective service."

Jason W on March 2025


Avatar for District Renovations LLC
District Renovations LLC
1336 Spring Hill Rd
4.83(
15
)
Approved Pro
District Renovations LLC
1336 Spring Hill Rd
4.83(
15
)
Approved Pro
Customers say: Terrific value
78 local quotes requested
15 years of experience

Here at District Renovations LLC, 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!

"Peter and his team did a fantastic job with my master bathroom remodel. I was home during the job so I got to see ALL of the work as it was being done. Peter gave me continuous status updates about the progress and his team were good at letting me know when problems arose that needed clarification."

Kevin M on June 2025

Here at District Renovations LLC, 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!

"Peter and his team did a fantastic job with my master bathroom remodel. I was home during the job so I got to see ALL of the work as it was being done. Peter gave me continuous status updates about the progress and his team were good at letting me know when problems arose that needed clarification."

Kevin M on June 2025


Avatar for CasaNova Design And Build
CasaNova Design And Build
528 Beacon Hill Terrace
5.00(
5
)
Approved Pro
CasaNova Design And Build
528 Beacon Hill Terrace
5.00(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 years of experience

Successfully serving the DMV area for several years, we thrive for our clients to have a smooth and stress-free experience during our time together. With our kind and experienced team, we take on all forms and sizes of projects - from kitchen and bathrooms, fireplaces, and decks, to full additions and roofing. We look forward to working with you on your next project. CasaNova offers free estimates and 3D rendering! We welcome all and any of your questions and thank you for your interest in CasaNova!

"Jessica and Chris helped guide me through my kitchen remodel that I had been thinking about for years but was unsure just what was possible and would meet my vision. They helped a great deal to meet my vision and guide me through the process. Their team was great and here everyday until the renovation was completed and it was completed on schedule. They also were quick to come and fix the inevitable little things we noticed that need touch ups even after it was complete. I also appreciated they brought samples for me to chose from so I wouldn't have to run around during a pandemic. I highly recommend them, it was a pleasure to have them complete our renovation."

Patricia t on October 2021

Successfully serving the DMV area for several years, we thrive for our clients to have a smooth and stress-free experience during our time together. With our kind and experienced team, we take on all forms and sizes of projects - from kitchen and bathrooms, fireplaces, and decks, to full additions and roofing. We look forward to working with you on your next project. CasaNova offers free estimates and 3D rendering! We welcome all and any of your questions and thank you for your interest in CasaNova!

"Jessica and Chris helped guide me through my kitchen remodel that I had been thinking about for years but was unsure just what was possible and would meet my vision. They helped a great deal to meet my vision and guide me through the process. Their team was great and here everyday until the renovation was completed and it was completed on schedule. They also were quick to come and fix the inevitable little things we noticed that need touch ups even after it was complete. I also appreciated they brought samples for me to chose from so I wouldn't have to run around during a pandemic. I highly recommend them, it was a pleasure to have them complete our renovation."

Patricia t on October 2021

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

Yes, you can add a bathroom on a concrete slab, but the crew will need to saw-cut the slab, trench in new supply and drain lines, and then patch the concrete without weakening the foundation. Working with an experienced plumber and concrete pro keeps the structure intact and helps the new bathroom pass inspections.

schedule covers planning, permits, framing, rough-ins, finishes, and punch-list items. 

Larger spaces or extensive plumbing and electrical upgrades can stretch the timeline, while a simple powder-room conversion may wrap up faster. Hiring licensed pros helps keep the schedule on track and the work up to code.

The best location depends on how your family uses the space. An upstairs bath keeps nighttime trips close to the bedrooms, while a first-floor powder room is handy for guests and everyday traffic. 

Think about where plumbing lines already run, how much square footage you can spare, and what layout changes fit your budget. A pro can map out the smartest spot and handle any code hurdles.

With the right planning, you can carve out a bathroom in almost any part of the house. A successful addition requires sufficient space, proper ventilation, and access to plumbing and electrical systems. Structural modifications and adherence to building codes are essential. 

This process demands careful planning and the coordination of specialized professionals who ensure that the new space meets all code requirements and functional needs.

Under specific conditions, adding an extra bedroom can boost home value more than adding a bathroom. Home value is driven by overall configuration, market demand, and functional balance. A new bedroom influences the property’s appeal in different ways, while an additional bathroom enhances living convenience. Evaluating the current layout and market trends determines the optimal choice for maximum value.

The Leesburg, 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.
master bedroom with fireplace
Jun 26, 2025
Jun 26, 2025
Budget for bedroom remodel costs based on factors such as bedroom size, remodel type, features, materials, labor, and more.
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.
Outdoor view of the modern house
Jun 16, 2025
Jun 16, 2025
Explore how square footage, room type, home additions, and other common factors affect house renovation costs with our detailed cost guide.
BRIGHT OPEN ATTIC SPACE
Jun 10, 2025
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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.
white and gray kitchen with butchers block countertop
Apr 8, 2025
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Looking to enhance the warmth and utility of your kitchen? Explore how much a butcher block countertop costs and start your budget here.
built-in outdoor kitchen with grill and sink
Apr 30, 2025
Apr 30, 2025
Budget for outdoor kitchen costs based on factors such as appliances, materials, permits, labor, amenities, kitchen size, customizations, and more.
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