Open the designer
A house builds itself while the loader paints real progress — first click skips it.
Builder feature · free · in your browser
Start from 140 Ready House Designs —All Editable
The Houses panel holds 140 original designs covering the Polish-market typology: single storey, attic or two storeys; gable, hip, flat or shed roofs; none, one or two garage bays. Placing one replaces what is on the plot — and everything stays editable. Move a wall, cut a bigger window, swap the clinker for plaster. The app opens on a different house each visit, so the catalogue shows itself off.
How it works — in the app
Open the Houses panel
Filter the 140 designs by storeys, roof type and garage bays.
Place one
It replaces the design on the plot and stays fully editable.
Make it yours
Move walls, cut openings, change finishes — then Ctrl+S to save.
What you get
140 house designs is one of fifteen feature pages covering what ships in Builder today — every claim here maps to a shipped, verified feature. The list below is the concrete surface:
- 140 ready-made house designs in the Houses panel
- Polish-market typology: single storey, attic or two storey; gable, hip, flat or shed; none, one or two garage bays
- Placing a design replaces the plot — and everything stays editable afterwards
- Original designs, built for this catalogue — no copying of named studios
- A different house opens on every visit, so you see the range
- Pairs with the rest: *.webhome.json files, ?design= links and account-saved designs
FAQ
Is the house locked after I place it?
No — that is the point. A placed design is a normal editable model: walls, openings, roofs, finishes and furniture all stay yours to change. Starting from a design is a shortcut, not a template with a lock.
Are these copies of real catalogue houses?
No. The 140 designs are original work made for Builder, covering the Polish typology self-builders actually look for. We do not copy named studios' plans, and the provenance policy on the About page says so outright.
How do I keep my variant?
Sign in with your castomo account and designs save server-side, with autosave to localStorage. You can also exchange *.webhome.json files, or share the design with a ?design= link that opens it for anyone you send it to.
More Builder features
Keep reading the tour, or jump back to the Explore hub for all fifteen.
Draw wallsDraw house walls online for free.Open the feature →
Fit a roofPick one of four roof types and Builder auto-fits it to your exact perimeter — gable, hip, flat or shed —…Open the feature →
Model libraryFurnish your design from 381 CC0 models — 135 garden, 66 kitchen, 42 decor, 42 storage and more.Open the feature →
Open the designer — one of 140 houses is already building itself.
No install, no plugin — a house builds itself the moment the page opens.