What is a garage conversion?
A garage conversion turns an integral or attached garage into habitable space, such as a study, playroom, bedroom or utility. The garage door is replaced with a wall and window, the floor is raised and insulated, and the walls and roof are brought up to building regulations.
How much does a garage conversion cost in Hatfield?
In Hatfield, a garage conversion typically costs £19,000–£32,000 for a single integral garage, including VAT at 20% (standard rate). Building costs in the East of England run about 6% above the UK average, and the figures for Hatfield are adjusted to reflect that. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A single integral garage | £19,000–£32,000 |
| Higher specification | £32,000–£40,000 |
Your quote will depend mainly on:
- Integral, attached or detached
- Single or double garage
- Bathroom or kitchen
- Heating and flooring
For a figure based on your own measurements, try the guide price tool, then book a free home visit for a fixed quote.
Do you need planning permission for a garage conversion in Hatfield?
Before anything is built in Hatfield, we confirm which approvals apply in England. In England converting an integral or attached garage usually does not need planning permission, unless a condition on the house removed permitted development rights (common on estates built in recent decades) or the house is listed. Building regulations approval is always needed.
Where work involves a shared wall, building on the boundary, or digging foundations within 3 metres of a neighbour’s building and deeper than its foundations (or within 6 metres for deeper work), the Party Wall etc. Act 1996 applies and notices must be served before work starts.
At the survey we check your house’s planning history and any restrictions, and tell you which route applies.
What we handle
On a typical garage conversion we handle:
- New wall and window to replace the garage door
- Foundation check under the garage door opening
- Drawings and building control application
- Wall and ceiling insulation
- Floor raised with insulation and damp-proof membrane
- Electrics, heating and plastering
How long does it take?
The build itself usually takes 3 to 6 weeks on site. Before that, surveys, drawings and approvals usually take 6 to 12 weeks, longer if the council asks for changes.
Building in Hatfield
Across the East of England, 1930s and post-war semis, newer estates and rural cottages all feature, each with different extension and loft options.
From AL10 outwards, we take on projects throughout Hatfield and the surrounding parts of Hertfordshire.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions about garage conversions in Hatfield
Do you build garage conversions in Hatfield?
Yes. We build garage conversions across Hatfield, including postcodes AL10. Every project starts with a free home visit.
How much does a garage conversion cost in Hatfield?
In Hatfield, a garage conversion typically costs £19,000–£32,000 for a single integral garage, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.
How long does it take?
Typically 3 to 6 weeks on site.
Can the floor be level with the house?
Yes. The garage floor is raised and insulated to match the house floor level.
Do I need planning permission for a garage conversion?
Usually not if the work is internal and the house keeps its permitted development rights. Many newer houses have planning conditions that remove those rights, in which case an application is needed.