Submit an idea
World savingMedium2 weekendsUnder $100Web and mobileWorld saving

Build Scrap Swap

Contractors post leftover building materials for free local pickup.

Claim this idea Build it for me

Nobody has claimed this yet. Be first.

The idea

Builders and renovators list leftover lumber, tile, drywall and fixtures with photos and a pickup window. Local makers, schools and DIYers claim them. Useful material gets a second life instead of a dumpster fee.

Who it is for
Small contractors and renovation crews
How it makes money
Featured listings and a small fee for pro contractor accounts
Suggested stack
Next.js web app plus Expo mobile app, shared Supabase backend
Launch cost
Under $100

Your first AI prompts

Paste these into Claude, Cursor or Lovable, in order. Check that each one works before moving on.

PROMPT 1 OF 3

Build a web and mobile app called Build Scrap Swap. Contractors sign up and post a listing with photos, material type (lumber, tile, drywall, fixtures, paint, hardware, other), quantity, condition, pickup area and pickup window.

PROMPT 2 OF 3

Let takers browse listings by distance and material type and tap claim. The poster approves one claimer, which reveals the exact pickup address to that person only. Listings auto-expire after the pickup window.

Claim free to unlockClaim this idea
PROMPT 3 OF 3

Add a contractor dashboard showing items given away and an estimated dumpster volume avoided. Send push or email alerts to takers for new listings in saved categories. Add Stripe for a pro contractor plan with featured listings.

Claim free to unlockClaim this idea

The 10 step playbook

  1. 01Claim your ideaPut your name on it and unlock every prompt and the full playbook. Always free.
  2. 02Domain and nameBrainstorm a short name, check the .com, and register it.
  3. 03Trademark basicsSearch for conflicts before you fall in love with the name.
  4. 04AI build kickoffPaste the prompts below into Claude, Cursor or Lovable, one at a time.
  5. 05Server and hostingPick a host and have your AI walk you through setup.
  6. 06Backend and dataLogins, database and payments, one prompt at a time.
  7. 07Frontend and designScreens, colors and a simple logo that look professional.
  8. 08Go livePut it online, then submit to the App Store and Google Play if it is a mobile app.
  9. 09Marketing planLaunch posts, local outreach and your first 100 users.
  10. 10Launch and growShip it and add your live link to earn the Shipped badge.
Your full playbook for Build Scrap SwapEvery step spelled out for this idea, with the exact prompts to paste into your AI.
Open full playbook

More world saving ideas