AI project planning
Start from a photo or a few sentences. Plumb & Square works out sensible dimensions, materials and a build approach for your project.
Plan it true. Build it fair and square.
Plumb & Square is the honest build-vs-buy planner for UK DIYers. Describe your project — an alcove shelf, a kitchen island, a garden shed — and get real materials costs from UK retailer pricing, an exact cut list and a step-by-step build guide, then an honest verdict on whether you'd be better off buying it ready-made. Even when that earns us nothing.
Free to join the early-access list. No spam, just the launch.
Everything you need to decide — and to build
From a rough idea to a costed plan and a guide you can take to the workshop.
Honest cost comparison
Real materials costs from UK retailer pricing, set against ready-made options — and we'll tell you plainly when buying wins. No thumb on the scale.
Complete build guides
A full shopping list, an exact cut list, and step-by-step assembly — each phase with an honest active-work time estimate.
Early access - be first in
We're putting the finishing touches on Plumb & Square. Leave us a note and we'll email you the moment it's ready. That's the only thing we'll use it for.
Email us to join the list