Service 03
Renovations, Extensions & Refurbishment
House extensions, loft conversions and full property refurbishments — more space and better performance, without losing the building's character.
Overview
Transformation work that respects what's already there.
Rear and side-return extensions, loft and basement conversions, and whole-house refurbishments — every project starts with a structural survey, not a guess, so the design that gets approved is the one that actually gets built.
We work on occupied homes as standard: phased access, dust containment and clear daily communication are built into the programme, not treated as an afterthought.
Benefits
Why homeowners choose Crestline.
Live-in friendly
Phased sequencing and daily site discipline for occupied properties.
Planning & approvals handled
Permitted development, planning and Building Regulations managed for you.
Fabric-first upgrades
Insulation and glazing performance reviewed as part of every extension.
Process
How a renovation project runs.
Structural Survey
Assessing existing fabric before any design work begins.
Design & Approvals
Drawings and planning / Building Regulations submissions.
Fixed Quotation
Itemised price covering structure through to finishes.
Phased Build
Sequenced around occupied rooms and daily household routines.
Snagging & Handover
Joint walk-through, snag list closed before final invoice.
Before & After
Drag to compare.
Before
After