Build more from the bricks you already own
Add the LEGO® sets you own and instantly see which other sets you can build, what parts you are missing, and whether it is cheaper to build than to buy.
Same bricks. Endless builds.
Already own a couple of sets?
Here’s what you could build right now from these sets:
Millennium Falcon
AT-ATWhat makes us special
Smart part substitution
Missing a 1×4? We'll show you it's two 1×2s you already own — different shapes that fill the same role.
Blazing-fast results
Your whole collection checked against thousands of sets in milliseconds — no waiting.
Combine your whole collection
Pool the parts from every set you own — up to 20 at once — to see everything you can build.
Reusability Score
A 0–100 score for how reusable a set's parts are across the catalog.
AI set entry
Type the sets you own in plain language and we'll resolve the exact set numbers for you.
Unlimited sets & groups
Save unlimited sets and organize them into groups in your free account.
Your next build is hiding in the bricks you own
No account, no signup — just add your sets and start building.