Deck Builder Alpharetta
Obsidian Exteriors is a family-owned deck builder based right here in Alpharetta. For more than a decade, we’ve designed and built custom decks for homeowners who want more usable outdoor space, whether that’s a simple platform off the kitchen, a second-story deck over a walkout basement, or a full rebuild of a worn-out wood deck.
Because we’re local, we know what Alpharetta backyards throw at a deck: sloped lots, red clay, heavy shade from mature trees, humid summers, and HOA design rules. We plan every build around those conditions so your deck looks right on day one and holds up for years. Serving the wider area? See our North Metro Atlanta deck builder page for the full overview of our deck services.
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Transform Your Backyard With a New Deck
Transforming your home’s exterior can enhance its curb appeal and give it a refreshed, polished look. Let us give your home the makeover it deserves and make it look brand new again!
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When I needed some siding repairing jobs done at my house and I didn’t quite know how to fix it myself I decided to call Jorge to get it done… read more
torres jose
July 15, 2025Fast, clean, and professional James Hardie siding install. The crew worked efficiently and kept the jobsite spotless. Highly recommend.
Juan Castaneda
January 29, 2026Jorge and his crew are very efficient, timely, and professional. Minor concerns that always come up during renovations were handled quickly, and Jorge had suggestions which enhanced my project. I can’t… read more
Ken
July 13, 2026 -
This is a great company—on time, say what they mean and mean what they say. Very professional and explains everything. I had siding wind damage. They gave me options that… read more
Carolyn Anderson
January 16, 2026Obsidian Exteriors changed out 3 of our windows and replaced the siding on our rotted chimney and we are very happy with the end result. They were very clean throughout the… read more
brandon anderson
July 1, 2025100% recommend Obsidian Exteriors. They replaced the siding on my entire house. Everything was done in a timely manner and didn’t rush to get the job done. They took… read more
Liliana Velazquez
May 21, 2025 -
Obsidian Exteriors did some concrete work for my patio and it turned out AMAZING!! I’m super happy with the quality of work they do and I cannot recommend them enough.… read more
Sally Hermosillo
May 26, 2025Obsidian Exteriors installed all the windows in my new build home. Was very impressed at how efficient and meticulous they were with the whole process from helping me choose the… read more
Marissa Velazquez
May 21, 2025We used Obsidian to repair a woodpecker hole in our siding. Fast service, competitive service fee and good quality job
alice robson
February 14, 2026
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Your Home, Expertly Upgraded
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Give Us a Call Today For a Free Quote!
404-495-7701
Custom Decks Designed for Alpharetta Backyards
Sloped lots and walkout basements: Many Alpharetta homes sit on rolling lots, so elevated and multi-level decks are common. We size posts, beams, and footings for the height and load of your deck.
Red clay soil: Georgia clay holds water and shifts. We set footings at proper depth on undisturbed soil to keep your deck solid and level.
Shade and humidity: Decks under pines and hardwoods stay damp longer, which invites mildew and rot. We recommend materials and spacing that let your deck dry out and stay clean.
HOA guidelines: Many Alpharetta neighborhoods require architectural review before a deck is built. We help you choose materials, colors, and railing styles that fit your HOA’s rules.
Decking Materials We Offer
Composite Decking
Composite is the most popular choice among our Alpharetta clients. We install composite decking from trusted brands including Trex and TimberTech. Composite boards resist moisture, fading, insects, and splintering, and they never need staining or sealing. It costs more upfront than wood but saves years of maintenance.
PVC Decking
PVC decking is made entirely of synthetic material with no wood fibers, making it lighter than composite and highly resistant to moisture and mold. It’s a great fit for shaded, damp backyards and for homeowners who want the lowest-maintenance deck possible. PVC is a premium option that typically costs more than composite.
Pressure-Treated Wood
Pressure-treated pine is the most budget-friendly decking option and a classic look many homeowners love. It’s treated to resist rot and insects but needs regular cleaning and sealing or staining every few years to stay in good shape. Pressure-treated lumber is also the standard choice for deck framing, even under composite and PVC boards.
Railings
We pair decks with low-maintenance aluminum railings, as well as wood and composite railing systems, to match your home’s style and HOA requirements.
Want to compare premium hardwoods like Ipe too? Our custom deck building services page covers every material we work with.
Alpharetta Deck Permits
Most new decks in Alpharetta need a building permit, and we handle the process for you. Here’s what Alpharetta homeowners should know:
City of Alpharetta permits: Decks inside city limits are permitted through the City of Alpharetta’s online Permitting Portal, not Fulton County.
Check your jurisdiction: An Alpharetta mailing address doesn’t always mean you’re in the City of Alpharetta. Some homes are in Johns Creek, Milton, or unincorporated Fulton or Forsyth County, each with its own permit office. We’ll confirm which one applies to your property.
Trees count: If a deck will disturb specimen trees, the city may require an Engineering Permit Card, known as a “Pink Card,” before the building permit is issued.
HOA first: If your neighborhood has an HOA, you’ll typically need architectural approval before construction begins.
We prepare the plans, submit the permit, schedule inspections, and make sure your deck is built to code.
Our Alpharetta Deck Building Services
New custom deck construction
Deck rebuilds and board replacement on existing framing
Deck additions and expansions
Elevated and multi-level decks
Stairs, railings, built-in seating, and pergola additions
Our Service Area
Alpharetta, GA
Auburn, GA
Buford, GA
Cumming, GA
Dacula, GA
Grayson, GA
Johns Creek, GA
Lawrenceville, GA
Loganville, GA
Marietta, GA
Milton, GA
Snellville, GA
Sugar Hill, GA
Suwanee, GA
Have Questions? Call Now For a Consultation! 404-495-7701
Deck Building Services Frequently Asked Questions (FAQ)
Why should I choose Obsidian Exteriors for deck building in Alpharetta, GA?
We’re a family-owned exterior company based in Alpharetta with more than a decade of experience building custom decks. We know local lots, soil, permits, and HOA rules, and we keep you informed from the first consultation to the final walkthrough.
How does the deck building process work?
It starts with a free consultation where we walk your yard, discuss how you want to use the space, and take measurements. We then create a design and material plan that fits your budget, handle permits and inspections, build your deck with our own crew, and finish with a final walkthrough.
What decking materials do you offer?
We offer composite decking from Trex and TimberTech, PVC decking, and pressure-treated wood, along with aluminum, wood, and composite railings. We’ll walk you through the cost, look, and maintenance of each option so you can choose with confidence.
Is composite or PVC better for a shaded Alpharetta backyard?
Both handle shade and humidity far better than wood. PVC has no wood content, so it offers the most resistance to moisture and mold, while composite costs less and comes in a wide range of wood-look styles. We’ll recommend the best fit for your yard and budget.
Is pressure-treated wood still a good deck option?
Yes. Pressure-treated pine is the most affordable decking option and looks great when maintained. Plan to clean and seal or stain it every few years to protect it from moisture and sun.
Do I need a permit to build a deck in Alpharetta?
Most new decks in Alpharetta require a building permit, especially decks attached to the house or raised above the ground. Obsidian Exteriors handles the permit application and inspections for you.
My address says Alpharetta. Does the City of Alpharetta issue my permit?
Not always. Some homes with Alpharetta mailing addresses are actually in Johns Creek, Milton, or unincorporated Fulton or Forsyth County. We’ll confirm your jurisdiction and file with the right permit office.
Do I need HOA approval before building a deck?
Not always. Some homes with Alpharetta mailing addresses are actually in Johns Creek, Milton, or unincorporated Fulton or Forsyth County. We’ll confirm your jurisdiction and file with the right permit office.
Will a new deck add value to my Alpharetta home?
Not always. Some homes with Alpharetta mailing addresses are actually in Johns Creek, Milton, or unincorporated Fulton or Forsyth County. We’ll confirm your jurisdiction and file with the right permit office.
Do you offer services beyond deck building?
Not always. Some homes with Alpharetta mailing addresses are actually in Johns Creek, Milton, or unincorporated Fulton or Forsyth County. We’ll confirm your jurisdiction and file with the right permit office.