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 Boston?
In Boston, a garage conversion typically costs £17,000–£28,500 for a single integral garage, including VAT at 20% (standard rate). Building costs in the East Midlands run about 5% below the UK average, and the figures for Boston are adjusted to reflect that. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A single integral garage | £17,000–£28,500 |
| Higher specification | £28,500–£35,500 |
The biggest cost drivers are:
- Bathroom or kitchen
- Heating and flooring
- Single or double garage
- Integral, attached or detached
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 Boston?
Here is how the rules work for a garage conversion 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.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
Our first visit includes a check of your planning history, so you know the route before paying for drawings.
What we handle
On a typical garage conversion we handle:
- Floor raised with insulation and damp-proof membrane
- Drawings and building control application
- Electrics, heating and plastering
- Building control completion
- Planning check for removed permitted development rights
- New wall and window to replace the garage door
How long does it take?
Expect 3 to 6 weeks on site. Design and approvals come first and typically take 6 to 12 weeks, depending on the approval route.
Building in Boston
In the East Midlands, many estates built since the 1960s have integral garages that convert well into a study or bedroom.
We work across Boston and neighbouring areas such as Spalding, Skegness and Wisbech. Postcodes we cover in Boston include PE21.
How it works
- 01
Free visit
We look at the property, talk through what you want and measure up. There is no charge and no obligation.
- 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
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions about garage conversions in Boston
Do I need building regulations approval?
Yes. Converting a garage to a habitable room needs building control approval for insulation, ventilation, fire safety and the new wall.
Do you build garage conversions in Boston?
Yes. We build garage conversions across Boston, including postcodes PE21. Every project starts with a free home visit.
How much does a garage conversion cost in Boston?
In Boston, a garage conversion typically costs £17,000–£28,500 for a single integral garage, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.
Can a detached garage be converted?
Yes, but using it as separate living accommodation may need planning permission.
How long does it take?
Typically 3 to 6 weeks on site.