Loft & Conversions calculators

Convert space you already own. These calculators cover loft conversions, garage conversions and garden rooms.

Free loft conversion cost calculator for Belfast and Northern Ireland. Rooflight, dormer, hip-to-gable and mansard prices with fees and contingency.

Free garage conversion cost calculator for Belfast and Northern Ireland. Price a single or double garage with floor, insulation and door options.

Free garden room and garden office cost calculator for Belfast and Northern Ireland. Price insulation, electrics, cladding, plumbing and the base.

Other calculators

Single storey, double storey, rear, side and wrap-around

Loft, wall, floor and roof insulation with U-value modelling

Bricks, blocks, concrete, mortar, fencing and paving quantities

Driveways, patios, decking and garden walls

Kitchens, bathrooms, roofs, windows and rewires