Garage to gym conversion cost

Single garage, want to turn it into a home gym. Rough cost for insulation, flooring and electrics?

Asked by kashif on 11th Aug 2026
Expert Trade Answers
"This is completely up to the condition of the garage in general

For example is it water tight and is it isulated

Does it need new lights and sockets and extractor fan

Does it need plasterboard and skimmed

Does it need windows or a door internal or external

Is the garage part of the house or stand alone

What flooring do you want?

Do you want skirting and architrave

Do you want it decorated

There are lots of questions in This

A price range is hard to say we have conversation cost from 4500 - 22000 depending on style"
Answered on 11th Aug 2026 - Member since Feb 2023 - report
"It depends on the measurement of the room. The insulation will cost between £500 per m2"
Answered on 20th Aug 2026 - Member since Aug 2026 - report
"Hi,
Assuming the existing brick garage is in decent dry condition, based on a single garage size. For full drylining and skimming, lighting and power, a new window and bricked up at front from £7000 to £10,000 excluding painting. Thanks"
Answered on 16th Aug 2026 - Member since May 2026 - report
"Hi there for a project of this description I would estimate around £13k"
Answered on 17th Aug 2026 - Member since Aug 2026 - report
"Hi i would say appreciate
£6500"
Answered on 11th Aug 2026 - Member since Jan 2026 - report
"Hi depends on condition of your garage.

Electrical work (sockets, lighting, consumer unit if needed)

£500–£1,500

Gym flooring (, ~15–20 m²)

£500–£1,500

Insulation/plastering/decorating

£1,000–£3,000

Heating/ventilation

£300–£1,200

Basic garage-to-gym conversion work

£2,000–£5,000
This is a rough idea would need some pictures or a site visit to give you an exact price.
Thank you Anthony."
Answered on 11th Aug 2026 - Member since Jul 2026 - report
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