Premier Deck and Patio Builder in Chantilly, VA
Mosaic Design & Build designs and builds decks, patios, and outdoor living spaces for homeowners in Chantilly and across Northern Virginia. Over the past nine years we have replaced rotting wood decks with composite, laid paver patios around fire pits and pools, and built covered outdoor kitchens that get used from April to November. If the back of your house is a patch of grass and a sliding door, we can change that.
Outdoor Living
What We Build Behind the House
Outdoor structures take more abuse than anything inside: freeze-thaw cycles, summer sun, standing water, and a hundred people at a graduation party. That is why we spend as much care on footings, base compaction, ledger flashing, and drainage as on the boards and pavers you see. Every project is designed to the shape of your lot, the grade of your yard, and how you actually plan to use the space.
Low-maintenance composite decking on pressure-treated framing is the standard for most Chantilly homes, with cedar or hardwood for owners who want real wood. We size the footings, flash the ledger properly, and build multi-level layouts with integrated stairs and railings.
A patio is only as flat and dry as its base. We excavate, compact crushed stone in lifts, set pavers or natural stone on a screeded bed, and edge and joint-sand the surface so it stays level through Virginia winters.
Built-in grills with gas and electrical runs, masonry fire pits and fireplaces, seat walls, and pergolas or roof structures for shade. We coordinate the trades so the gas, electric, and stone work all land in the right places.
Low-voltage step and rail lighting, cable or aluminum railings, and privacy screens finish a space. If your existing deck is structurally sound, we can also resurface it, replace railings, or rebuild failing sections instead of starting over.
What a Well-Built Outdoor Space Adds
A deck or patio that drains properly and stays level adds a room to the house for most of the year without the cost of an addition. Composite decking and stone surfaces need almost no upkeep, so the space gets used instead of maintained. Buyers in Fairfax and Loudoun County consistently pay for finished outdoor living, and a poorly built deck is one of the first things a home inspector flags, so building it right protects the sale as well as the weekend. If you are also planning a kitchen remodel or a rear addition, we design the outdoor space so it connects cleanly to the new interior.
Nine Years Building Outdoor Spaces in Northern Virginia
Mosaic Design & Build works out of Chantilly with homeowners across Fairfax and Loudoun counties. Here is what that experience means for your deck or patio:
Decks over a certain height and most structures need county permits, and nearly every neighborhood needs HOA sign-off. We prepare the drawings and submissions and meet the inspectors.
Footings below frost depth, compacted stone bases, stainless or coated fasteners, and correct ledger flashing are what keep a deck or patio sound through freeze-thaw cycles and humid summers.
Composite decking, aluminum railings, and concrete or natural stone pavers hold their look with a hose and a broom. We tell you honestly which products are worth the upgrade.
A dedicated project lead runs the excavation, carpentry, masonry, gas, and electrical crews in order, keeps you updated, and answers questions the same day.
Our Process
How an Outdoor Project Moves From Site Visit to Final Walkthrough
Outdoor work depends on grade, drainage, and weather, so the order matters. Here is how we run one:
We walk the yard, check grade, drainage, and access, note utility lines and setbacks, and talk through how you want to use the space.
You receive a layout and renderings, choose decking, pavers, railings, and features, and we file the county permit and HOA submission.
Footings or base are dug and set, framing or paver base goes in, and the deck boards, stone, railings, and structures are built in sequence.
Lighting and finishing touches are installed, the final inspection is passed, and we walk the finished space with you.
Recent Outdoor Living Projects Around Chantilly
Browse decks and patios we have built in Chantilly, Sterling, Herndon, and nearby neighborhoods, from simple composite decks to full outdoor kitchens with fire features and pergolas.
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What Local Homeowners Say
Read how Northern Virginia families describe working with Mosaic Design & Build on their decks, patios, and outdoor spaces.
571-520-4088
Common Question
Questions Homeowners Ask Before Building a Deck or Patio
Most projects take two to four weeks of construction depending on size, features, and weather. Permits and HOA approval add a few weeks before work starts. You receive a written schedule during the consultation.
Cost depends on square footage, the material you choose, and features such as railings, lighting, a fire pit, or an outdoor kitchen. After the site visit you receive an itemized quote so you know exactly what is included.
Usually. Fairfax and Loudoun County require permits for most decks and for structures like pergolas and outdoor kitchens, and HOAs require design approval. We handle the paperwork and the inspections.
Composite decking with aluminum or composite railings for decks, and concrete pavers or natural stone for patios. Pressure-treated or cedar wood is available for owners who prefer it. We explain the maintenance each option needs before you choose.
Yes. If the framing is sound we can replace boards and railings, add lighting or stairs, or extend the deck. If the structure is failing, we tell you and rebuild it properly.
Yes. Built-in benches, seat walls, low-voltage lighting, gas or wood fire pits, and outdoor kitchens are all designed in from the start so the gas, electrical, and masonry are coordinated.
We do not finance projects directly, but we work with your lender if you are using a home equity line or renovation loan, and we can phase the scope to fit the budget you have now.
Call 571-520-4088 or send a note through our contact page. We set up an on-site visit, walk the yard with you, and follow up with a written proposal.
Ready to Build Your Outdoor Space?
Tell us how you want to use your backyard and we will design a deck or patio around it. Call 571-520-4088 or email info@mosaicbuild.com to book an on-site consultation.
Serving Chantilly and the Surrounding Counties
Mosaic Design & Build builds decks and patios in Chantilly, Sterling, Herndon, Reston, and across Fairfax and Loudoun counties.