OpenCatio3D - Catio Designer

penCatio3D helps you design a catio — an outdoor enclosure for your cats — around your own home. START FROM YOUR HOME Choose where it goes: against a wall or window, on the ground beside the house, on a porch or balcony, or freestanding in the yard. Enter the wall, its windows, doors, vents and meters, then the catio's size. Every number remembers how you got it — typed, taped or measured with AR — so you always know which ones still need checking with a tape. DESIGN IN PLAN AND 3D Lean-to, freestanding, window box and tunnel layouts. Set the size, lumber and post spacing, the roof (mesh, solid or partly covered), the base and a dig-proof skirt. Add a door with a latch and a self-closing hinge, a cat door or window access, a cleaning hatch, and shelves, ramps, beds, scratchers and planters. Switch between plan and 3D, or see both side by side on iPad and Mac. DESIGN FOR YOUR CATS Record each cat's age, mobility, size and escape risk, so the design suits the cats you have. CHECK IT 51 rules look for escape gaps, missing latches and self-closers, dryer vents or emergency-exit windows inside the catio, weather, digging, elevation, perches, water, ramps for older cats and toxic plants — each with the fix and its source. Acknowledge what you accept, or record a professional review. BUILD IT Every board, mesh panel, roof sheet and screw comes from the same model as the 3D view: a shopping list with a cost range, a cut list on standard lengths, and numbered assembly steps. Export a plan package PDF with elevations, or the lists as spreadsheets. Until the checks are clear, the package is marked as a concept. SEE IT AT FULL SIZE Place the model in AR at true scale, with a 1 m reference bar. AR is a guide for visualising, not a measuring guarantee. NOTES ON SITE Photograph the wall, ground and anything in the way. Photos stay on your device. SHARE AND CONTINUE Open the design in the OpenCatio3D web planner, send a link, open it in OpenPlan3D, or export images and a 3D model. PRIVATE BY DEFAULT No account. Your catios, photos and notes stay on your device unless you share them. OpenCatio3D gives planning guidance. It is not an engineering, building-code, landlord or veterinary approval. Porch and balcony enclosures are concept-only and need professional or landlord review.