Storage concept planner

Understairs Planner

Explore fitted storage ideas for the space beneath your stairs. Try layouts, compare finishes and share a visual concept with your joiner or designer.

Available on the App Store and Google PlayFor iPhone, iPad and Android · UK price £9.99, paid once.

App Store Google Play

See how your space could work

Enter your stair-space measurements in millimetres, arrange storage modules and compare doors, finishes and handles. Explore exterior, inside, measurement and exploded concept views, then rotate and zoom the offline Realistic preview.

Understairs Planner realistic preview of cream storage cupboards beneath wooden stairs — Preview your concept

Understairs Planner designer showing the storage configuration — Arrange your storage

Understairs Planner Make workspace showing a calculated sheet layout — Review sheet layouts

Keep your planning together

Guided measurements and configurable storage layouts
Door, material, finish and handle choices
Local 3D previews, with lighting controls and image sharing
Cutting settings, calculated parts and sheet layouts with warnings
Saved projects, draft recovery and editable backup import and export
PDF preview, printing and sharing through your device

No subscription, sign-up, advertising or tracking. Projects are stored locally. You control exports and sharing; device backups follow your platform settings.

A concept to discuss with a professional

Understairs Planner is a visual concept planner. It is not a verified survey, structural approval, manufacturing drawing or quotation. Site conditions, measurements, clearances, materials, hardware and installation details must be checked by a suitably qualified professional before manufacture or installation.

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Planning the floor around your new storage? Explore FloorMark for floor and tile layouts, measured cuts and skirting estimates. A separate paid app from Flovi Limited.