Long Island Homeworks
Honest Pricing

What projects actually cost

Honest ranges based on 618completed projects across Nassau and Suffolk. We don't publish specific numbers on service pages — every home is different. Here's the general picture.

Dormer Additions

Typical range: $85K – $220K

Shed, Cape, attic, and full dormers

Cost drivers
  • Dormer size and configuration
  • Existing roof pitch and framing condition
  • Finish level (primary suite vs. bedrooms)
  • Town-level permit requirements

Home Additions

Typical range: $180K – $650K

Second stories, rear additions, primary suites, in-law suites

Cost drivers
  • Square footage and number of rooms
  • Structural reinforcement to existing frame
  • Mechanicals (HVAC, electric, plumbing)
  • Finish level and cabinetry

Custom Homes

Typical range: $1.6M – $4M+

Ground-up custom homes and tear-down rebuilds (East End premium)

Cost drivers
  • Square footage (3,500–8,000+ sq ft)
  • Site conditions and foundation complexity
  • Finish level (production vs. luxury)
  • FORTIFIED or ENERGY STAR certification paths
Ranges reflect typical completed projects 2022–2025 and exclude client-selected premium allowances (high-end appliances, custom millwork, specialty stone, and waterfront coastal requirements). East End / Hamptons pricing runs 20–40% above the Nassau/Suffolk baseline.
Common Questions

About pricing

Want a real number on your house?

Frank walks your property, sketches a scope, and returns a firm fixed-price quote within 10 business days.

Mon–Fri, 7am to 6pm | Saturdays by appointment · Call or text anytime

(631) 641-5491