Accepted
Massachusetts, USA
- Origin program
- Massachusetts, USA
- Source
- Massachusetts ADU Design Challenge Showcase
- Last checked
- Aug 25, 2026
- Additional notes
- State design-challenge winner. Reusable prototype requiring local and site-specific review.
Plan record
Sunlit Haven
Sunlit Haven is a prototype ADU plan from Yiren Weng. The public source lists it as 785 sq ft; bedroom count and bathroom count are not listed. It originated in the Massachusetts, USA program. This directory currently shows acceptance in Massachusetts, USA. Source context comes from Massachusetts Executive Office of Housing and Livable Communities, last checked Aug 25, 2026. Use the linked provider, location, and source records to verify current acceptance before relying on the plan.
Source-backed summary
What public sources list
Sunlit Haven is a prototype ADU plan from Yiren Weng. The public source lists it as 785 sq ft; bedroom count and bathroom count are not listed. It originated in the Massachusetts, USA program. This directory currently shows acceptance in Massachusetts, USA. Source context comes from Massachusetts Executive Office of Housing and Livable Communities, last checked Aug 25, 2026. Use the linked provider, location, and source records to verify current acceptance before relying on the plan.
- Provider record
- Yiren Weng
- Origin program
- Massachusetts, USA
- Accepted location pages
Details
Plan facts
- Plan identifier
- Not listed in source
- Provider
- Yiren Weng
- Origin location
- Massachusetts, USA
- Accepted locations
-
- Massachusetts, USA (Accepted)
- Status
- Prototype
- Size
- 785 sq ft
- Bedrooms
- Not listed in source
- Bathrooms
- Not listed in source
- ADU type
- Not listed in source
- Construction type
- Not listed in source
- Plan fee
- $0
- Estimated cost
- Not listed in source
- Last checked
- Aug 25, 2026
Plan notes
Notes
- Foundation notes
- Not listed in source
- Utility notes
- Not listed in source
- Energy notes
- Not listed in source
- Accessibility notes
- Not listed in source
- Permit fee notes
- Local plan review, permit, and other project fees remain separate.
- Cost notes
- The free design is a starting point; construction and site-specific professional costs are not included.
- Additional notes
- State design-challenge winner. Reusable prototype requiring local and site-specific review.
Source and evidence
Massachusetts ADU Design Challenge Showcase
- Publisher
- Massachusetts Executive Office of Housing and Livable Communities
- Source type
- Plan catalog
- Reliability
- Official city/county/state government source (5/5)
- Last checked
- Aug 25, 2026
- Accessed
- Aug 25, 2026
Accepted-in locations
Accepted Locations
1 accepted location