If you're planning to build, the first question is always the same: what does it cost to build a custom home in Forsyth County? In 2026, most custom homes here are landing in the range of $250 to $450+ per square foot, depending on finish level, lot, and how custom the design really is. For a 4,000-square-foot home, that's roughly $1.0M to $1.8M for the house itself — before land. Those ranges match the market-wide figures in our North Atlanta Custom Build Index, which puts a typical 4,000–5,000 sq ft custom home at $1.2M to $2.2M. This guide breaks down exactly what moves that number, how long a build really takes, and how the permit process works, so you can budget and plan with confidence. (All figures here are directional estimates for planning, not quotes.)
Three things move a custom-home budget in North Georgia more than anything else:
Beyond the lot purchase, budget for site work that rarely makes it into a per-square-foot estimate: clearing, grading, driveway, well or water tap, septic or sewer connection, and permits. On an average Forsyth County lot this is frequently $40,000–$120,000, and it's the number that surprises people most.
As you move from Forsyth into the higher-demand North Fulton corridors — Alpharetta, Milton, and the Suwanee side — land values and finish expectations climb, and cost per square foot climbs with them. A true custom home in these markets commonly runs $350 to $500+ per square foot in 2026, and premium, architecturally complex builds can move past $500. Whole-project budgets for these homes frequently land between $750,000 and $3 million before land. These are directional planning ranges — your specific lot and selections move them far more than any market average.
A custom-home contract is built on allowances — dollars set aside for selections you haven't made yet (flooring, lighting, appliances, plumbing fixtures). Lowball allowances make a bid look cheap and then blow up during selections. As an experienced custom home builder in Cumming, GA, Kade Homes sets allowances at real, current North-Georgia pricing so your contract reflects the home you actually want — not a number designed to win the bid.
A family building a 3,800 sq ft home with a finished basement, on a gently sloped lot near Cumming, with high-but-not-extravagant finishes, typically plans for $1.1M–$1.4M all-in (house + site work), plus land. Move the finishes up or the lot gets harder, and you move toward the top of that range — and past it, toward the upper end of the per-square-foot range above, on a premium build.
A custom home is not a fast process, and honest expectations up front beat optimistic ones that slip. Here's how the calendar tends to run in our market (directional):
Add it up and most custom homes in our area run 14 to 22 months from first design meeting to move-in. A tighter build can beat that; an ambitious one on a hard lot can exceed it. Our custom home timeline guide walks through what moves each phase.
For homeowners who've never built before, permitting can feel like a black box. It isn't — it's a sequence, and a good builder runs it for you:
North Fulton municipalities such as Alpharetta and Milton run their own permitting, each with its own rhythm and requirements. Knowing those rhythms before you're standing in them is part of what you hire a local builder for.
How much does it cost to build a custom home in Forsyth County in 2026? Most custom homes in Forsyth County cost between $250 and $450+ per square foot, or roughly $1.0M–$1.8M for a 4,000 sq ft home before land. In the North Fulton markets of Alpharetta and Milton, true custom homes commonly run $350–$500+ per square foot. Finish level, design complexity, and your lot are the biggest cost drivers. All figures are directional.
How long does it take to build a custom home here? Plan on roughly 14 to 22 months from your first design meeting to move-in — about 3 to 6 months of design and pre-construction, a Forsyth County permit-review window of about 4 to 8 weeks for a complete submission, and roughly 10 to 14 months of construction. Larger or more complex homes take longer.
What does the Forsyth County permit process involve? It generally runs from lot evaluation and plan coordination, to submission to Forsyth County Community Development for review, into a sequence of inspections during construction. A complete, coordinated submission is what keeps the timeline on track. Alpharetta and Milton handle their own permitting.
Is it cheaper to build or buy a home in Cumming, GA? Building lets you control quality and layout, but a custom build usually costs more per square foot than buying an existing production home. The trade-off is a home built exactly to your needs with new-construction warranties.
What's not included in a custom home's price per square foot? Site work (clearing, grading, driveway, utilities, septic), permits, and the land itself are usually separate from the per-square-foot build number — budget $40,000–$120,000 for site work on a typical lot.
Every Forsyth County lot and family is different, so an accurate cost and timeline start with a conversation about your lot, must-haves, and finish level. Ready to talk real numbers for your lot? Reach out to Kade Homes for a no-pressure custom-home consultation.