Mosaic Design & Build · Northern Virginia
Home additions
and renovations.
Designed around you.
More room for your next chapter. Your all-in-one, one-stop shop for thoughtful design, permitting, and exceptional craftsmanship, with 125+ projects completed across the DMV.
4.9
Google rating from our clients
125+
Projects completed in the DMV area
One stop
All-in-one design, permitting & construction
- We offer financing
Flexible payment options for your project
Your local Northern Virginia design-build team
Virginia Class A contractor · License no. 2705181959
What we design & build
A home that grows with you.
Home additions
Room to grow, without leaving the neighborhood you love.
Garage additions
Space for your cars, your workshop, and whatever comes next.
Decks & patios
A new connection to the outdoors, made for everyday living.
Sunrooms & enclosed porches
More daylight. A closer connection to the outdoors.
Also thoughtfully crafted: whole-home renovations, custom homes, kitchens, bathrooms, basements and commercial renovations.
Architectural, structural & MEP plans and permittingThe Mosaic portfolio
Real homes. New possibilities.
Client stories on video
Hear it from the homeowners.
Client review · Herndon, VA
A second-story suite over the garage
A second-floor room addition built above an existing first-level garage, adding valuable living space without expanding the home’s footprint. Mosaic handled the design, permits and construction, matching the new level to the original architecture.
Home addition · Northern Virginia
Home addition and kitchen remodel
Room addition · Fairfax, VA
ADA-compliant first-floor addition
Room addition · Fairfax, VA
Modern, accessible first-floor addition
Design and build · Northern Virginia
Excellent designs
Addition cost calculator
What could your addition cost?
Answer a few questions about your room or garage addition for an estimated budget range, adjusted for your ZIP code.
- 1Project type
- 2Layout & features
- 3Site & exterior
- 4Planning
- 5Your estimate
Project type
What would you like to add?
A 14×20 ft room is 280 sq ft.
Enter a 5-digit ZIP to continue
One team. From idea to move-in.
A clear path to your next chapter.
01
Your first conversation
We listen to your ideas, discuss your priorities, and learn about your home and project goals.
02
Design & pricing
Explore layouts and finishes, align the scope with your budget, and put a clear plan in place.
03
Plans & permits
We coordinate drawings and permit submissions before construction begins.
04
Build & communicate
Our team coordinates trades and construction, with consistent updates as your home takes shape.
05
The final walkthrough
We review the details together, complete the punch list, and hand over your finished space.
Custom home building
Dreaming of a home built just for you?
From the first sketch to the final walkthrough, one team designs, permits and builds your custom home coordinating site work, framing, trades, material selections and every finishing detail.
Design and construction, under one roof
Architectural plans and permitting, coordinated for you
One point of contact from first idea to final walkthrough
Where we work
Design & build across Northern Virginia.
All Mosaic services are available in Fairfax, Loudoun, Arlington and Prince William counties and the City of Alexandria, with a focus on Great Falls, McLean, Vienna, Round Hill, Leesburg, Ashburn and Chantilly.
Fairfax County
Great Falls · McLean · Vienna · Chantilly · Fairfax · Herndon · Oakton · Reston · Burke · Lorton · Fairfax Station
Loudoun County
Round Hill · Leesburg · Ashburn · Sterling
Arlington County
Arlington
City of Alexandria
Alexandria
Prince William County
Manassas · Woodbridge · Gainesville
Your next chapter starts here
Let’s make room for your vision.
Tell us what you have in mind. We’ll take it from there.
