One fixed price for the whole job — not the hours

Garage Conversion Fair Price

Typical trade: builder / general contractor. Move the sliders and answer the questions.

Describe the job or snap a photo — AI fills in the sizes

Garage door opening
Floor needs raising & insulating?
Finish level

Fair fixed price for the whole job

£17,510

Fair range: £15,409 – £20,662

16 m² conversion

Realistic time on site

17.6 days

Crew / total hours

2 · 264.0 h

Labour (264.0 h × £40)
£10,560
Materials
£6,100
Building regulations fee
£550
Skip
£300

Over £25,827? Ask why in writing.

  • No building control application
  • Skipping a damp-proof membrane on the old garage floor
  • Big upfront cash payment

Insist on

  • One written fixed price for the full scope — no open-ended hours.
  • Deposit of 10–20% at most; balance after you inspect the work.
  • Any extra work agreed and priced in writing before it starts.
  • A typical single garage conversion takes 2–4 weeks for a small crew.
  • Usually permitted development, but building regulations sign-off is always required.

Estimate for an experienced, insured tradesperson. Local prices vary — adjust the hourly rate for your area.

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