Propertoasty

propertoasty.com — a web app that helps UK homeowners determine whether their property is eligible for and suited to a heat pump and/or solar PV upgrade, and produces a pre-survey report an MCS-certified installer can use to quote remotely with high confidence.

Forked from who-am-i-paying (same Next.js / Supabase / Stripe / Anthropic stack).

Getting started

npm install
cp .env.example .env.local   # fill in keys
npm run dev

Open http://localhost:3000.

Tech stack

• Next.js 16 (App Router) + TypeScript — see AGENTS.md for Next.js version notes
• Supabase — auth, database, storage (floorplans)
• Stripe — credits / per-check payments
• Anthropic Claude (Opus 4.7) — floorplan vision analysis
• Tailwind CSS v4 + shadcn/ui
• Google Maps Platform — Places autocomplete, Solar API, Static Maps
• EPC Register (epc.opendatacommunities.org) — Energy Performance Certificates

Scope

England & Wales only. Scotland uses Home Energy Scotland loans; NI uses the Boiler Replacement Scheme — out of scope for now.

Pre-survey indication only — not an engineering design. Final quote requires an on-site heat loss survey by an MCS installer.