What custom homes actually cost in southern Maine in 2026
Langone Site Services builds custom homes in southern Maine, the NH Lakes Region, and the NH Seacoast. New and custom homes start at $325 per square foot and go up from there. Land is not included.
What the start number covers
The $325/sq ft start is the shell on a standard inland lot. Finish level, garage, basement, utilities, and coastal or tight sites move the number up.
Major add-ons and their typical cost
- Attached 1-car garage: +$38,000
- Attached 2-car garage: +$75,000 (most common)
- Attached 3-car garage: +$108,000
- Finished basement: +$40,000 (insulation, drywall, flooring)
- Walkout basement: +$15,000–$25,000 over standard basement
- Kitchen upgrade to premium: +$25,000–$50,000
- Bathroom upgrade to premium per bath: +$8,000–$18,000
What the base price includes
- Full excavation, foundation, and utilities
- Framing, roofing (30-year architectural shingles)
- Exterior envelope (siding, windows, doors)
- All MEP rough-in and finish
- Mid-tier cabinets, counters, fixtures, floors
- Permitting and erosion controls
What's NOT included
- Land purchase
- House architect fees. We price those after a site visit.
- Well or town-water hookup (quoted to the lot)
- Septic if needed (Maine conventional starts at $18k; Maine design starts at $700; town permits vary)
- Landscaping beyond final grade and loam
Why the starting number sits where it does
The site work is priced with the building instead of being left as an allowance, so the number moves less often than it does on a quote that excludes the dirt. Ledge, a long utility run and town tap fees can still move it, and we tell you which before you sign.
If a figure you are comparing comes in well under $325 per square foot, the useful question is which of the foundation, the utilities and the permit fees it already contains.
Try the pricing calculator
A number for your own house takes under a minute in the instant pricing calculator, which asks about garage, basement, finish tier, square footage and region. Or book a build consult to walk the line items with Dylan.
The 2-minute calculator is on instant pricing. Published packages are on the ADU models.