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Free Design & Build Tools
Professional-grade calculators and design tools used by architects, builders and self-builders. All free, all in your browser, all with exportable PDF reports.
Floor Plan Studio
Draw professional 2D floor plans and convert them to interactive 3D models, with PDF, DXF and 3D exports.
Open toolStair Calculator
Design a staircase that complies with UK Building Regulations Part K: risers, goings, pitch and headroom.
Open toolCost Estimator
Ballpark UK build costs for extensions and renovations, adjusted for your region and specification.
Open toolSun Path & Shadows
Visualise sun position and overshadowing for any UK location, date and time in interactive 3D.
Open toolRoof Pitch Calculator
Convert pitch to rise, rafter length and roof area, with tile, slate and batten quantities.
Open toolBrick & Block Calculator
Bricks, blocks, mortar, sand and cement quantities for any wall build-up.
Open toolConcrete Calculator
Volume and material quantities for slabs, footings and post holes, ready-mix or bagged.
Open toolCAD Lab
Experiment with 3D modelling concepts right in your browser.
Open toolNeed more than a calculator?
Our team produces professional CAD drawings, photorealistic renders and technical drawings for planning applications and building control.
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