Skip links
Get An Estimate
Crest Projects
Crest Projects – Realistic Cost Estimator

Get your realistic cost estimate in under 30 seconds

Based on similar projects we
have delivered across London

Select an option to continue.

Picture1
House Extension
Picture2
Loft Conversion

What type of home is it?

Make the house 2k 202602222229
Detached
Add this logo 2k 202602222321
Semi-detached
terraced
Terraced

Extension Type?

Select your Loft Type

rooflight velux new
Roof Lights / Velux only
Minimal structural changes
From £35,000
dormer new e1771878916535
Dormer Loft
Additional headroom and space
From £55,000
Hip to gable new
Hip-to-gable
Maximise usable floor area
From £55,000
Mansard new e1771878945963
Mansard
Full additional storey
From £65,000
×

Where should we send your estimate?

    Explore
    Drag