Paul Knighton
Associate Manager
At MORE Realty
Michelle Wilson
Sales Associate
At MORE Realty
Buyer's guide
This guide breaks the custom home budget into its real lines: land, plans and permits, site prep, construction per square foot, allowances, financing, and time. Every figure is a planning range, not a quote, because lots, soils, and finish levels change everything. The good news: with a realistic range in hand, you can decide whether custom is actually your path or whether a builder's new home gets you 90% of the way there.
Worked example
Using valley-range numbers, a 2,000-square-foot custom build on a modest lot could plan out roughly like this: about $200,000 for the land, $25,000 for site development, $15,000 in permits and city fees, about $500,000 in construction at $250 per square foot, and a 10% contingency of roughly $74,000, for a ballpark total in the high $700,000 range before finishes and landscaping overruns. Push the land to the upper end or the finish level up, and the same house comfortably crosses $1 million.
This example is illustrative only and built for planning conversation. It is not a bid, and cost varies with every lot, jurisdiction, and finish decision in the valley.
$150,000 to $400,000+
A buildable developed lot in the Treasure Valley commonly runs from about $150,000 to $300,000-plus, with Eagle and foothill acreage well above that and smaller city lots nearer the low end. Larger acreage parcels run from roughly $200,000 to $800,000+.
About 1% to 2% of construction, plus impact fees
Building permits typically run 1% to 2% of construction value; impact fees in valley cities commonly land between $3,000 and $15,000, and plan review adds another $500 to $1,500. Combined, a mid-size build often lands in the low five figures.
$15,000 to $50,000 typically
Clearing, grading, utilities, and foundation come before the walls: expect roughly $5,000 to $20,000 for excavation and grading, tree removal at $500 to $2,000 per tree, and more if rock has to come out of the lot. The more unimproved the ground, the wider this line gets.
Roughly $200 to $350+ per sq ft
Entry-level custom builds in the valley have run around $225 to $260 per square foot, mid-level custom around $260 to $300, and higher-finish custom in the $300 to $400+ range. Finish level and site difficulty move this number more than anything else.
Varies by taste; often 10% to 20% of construction
Kitchen, baths, flooring, cabinetry, lighting, and landscaping allowances get drawn against construction. The safest habit is a written allowance list and a contingency of about 10% of build cost reserved for the overruns that show up on every project.
Construction loan, then permanent mortgage
Custom builds are financed with a construction loan that converts to a permanent mortgage at completion, with varying structures depending on lender. Down payments and equity requirements differ by program, so financing is usually arranged before you buy the lot.
Timeline reality
Design and permitting generally take 3 to 6 months before the foundation is poured. Then construction itself runs about 4 to 12 months depending on the plan, the builder, and the weather. Site prep alone is a few weeks on top. Compare that with a CBH new-build-from-plan, which closes on a builder's schedule with builder-level efficiencies, and you can feel the difference a defined plan menu makes.
The honest math
Custom buys you the exact floor plan, site, and finish; production (like CBH's communities) buys you price predictability, a warranty process that is a machine, and a home on a release schedule. If your dream is a specific plan on a specific lot, a custom build can be worth every dollar. If your dream is a new home under warranty, a builder's community is usually the cheaper road in both dollars and months.
Land values, labor rates, and lumber pricing move: I keep current, local planning numbers for both custom builds and new production homes, and I'm happy to run your specific scenario with no obligation.