Bay State ADU Builders ADU Pricing Ranges

Tier 1

1️⃣ Entry-Level ADU Estimated Range: $225,000 – $275,000 Designed for efficiency and value while meeting all Massachusetts building and energy codes. Typical features include: Studio or one-bedroom layout Conventional foundation Energy-efficient windows and doors Durable vinyl plank flooring Stock cabinetry Laminate countertops Standard plumbing and lighting fixtures Code-compliant HVAC system Simple exterior finishes Best suited for: Rental units Backyard cottages Budget-conscious homeown

Tier 2

2️⃣ Mid-Level ADU (Most Popular) Estimated Range: $275,000 – $350,000 A balance of comfort, durability, and long-term livability. Typical features include: One- or two-bedroom layouts Enhanced insulation and sound control Engineered wood or tile flooring Semi-custom cabinetry Quartz or solid-surface countertops Tile showers and upgraded bathrooms Improved exterior trim and finishes Higher-efficiency HVAC systems Best suited for: Aging-in-place solutions Multigenerational living Long-term family

Tier 3

3️⃣ High-End / Custom ADU Estimated Range: $350,000 – $450,000+ Fully customized ADUs with premium materials and architectural detail. Typical features include: Custom floor plans High-end exterior materials Custom cabinetry and built-ins Premium appliances Luxury bathroom finishes Advanced lighting and smart-home options Enhanced architectural detailing Best suited for: Primary residence expansion Long-term family housing High-value properties

ADA customized

3ADA-Compliant & Accessible ADUs ADA-compliant design can be incorporated into any pricing tier. Typical ADA features may include: Zero-step or ramped entry Wider doors and hallways Roll-in or curbless showers Reinforced walls for grab bars Accessible kitchen layouts Lowered switches and controls Proper turning radius clearances Typical ADA cost adjustment: ➕ $25,000 – $75,000, depending on scope and level of accessibility required.