Garage conversions in Coleshill, Atherstone and North Warwickshire
An annexe for family, or the extra room you need, without moving. We convert garages across North Warwickshire, from Coleshill and Water Orton to Atherstone, Polesworth and Kingsbury.
How much does a garage conversion cost in Coleshill and Atherstone?
Work out yoursAround Coleshill and Atherstone, a typical single garage conversion costs £14,500 to £23,000 with VAT. An annexe with a bedroom, shower room and kitchenette typically costs £33,500 to £54,000.
Prices include VAT, are the same in every village, and were checked on 14 October 2026.
1 in 7 North Warwickshire applications named an annexe, about three times the West Midlands share.
A bedroom, shower room and kitchenette for someone you love, under the same roof.
Planning applications 2016 to October 2026 naming an annexe: North Warwickshire 14 of 98; all eight councils 147 of 3,630. Council records collected by PlanIt.
Get a quote for your garageWill a garage conversion add value to my Coleshill and Atherstone home?
Generally, yes. An average North Warwickshire semi is worth about £268,000. A garage bedroom signed off by building control can add about £23,000 to £30,000.
After annexes, shower rooms and bedrooms came up most in applications here. About two in five houses in the borough are semis, at around 81 square metres.
| North Warwickshire home | Can add about |
|---|---|
| Semi-detached | £23,000 to £30,000 |
| Terraced | £19,000 to £22,000 |
| Detached | £25,000 to £27,000 |
Our estimate for a signed-off bedroom, using Nationwide's 2023 research with North Warwickshire prices from the House Price Index (July 2026) and floor areas from energy certificates. This leaves out any effect of losing the garage as parking or storage.
Planning in Coleshill and Atherstone, in short
Generally not neededWork kept inside the garage seldom needs a planning application to North Warwickshire Borough Council.
96.8% approvedSince 2016 the council approved 96.8% of decided applications and refused just 1. Half were decided within 53 days.
Annexes stay part of the homeAn annexe that shares the entrance, garden and bills counts as part of your house. A separate home needs planning permission.
Source: council records collected by PlanIt, with withdrawn applications counted as not approved.
Where North Warwickshire homeowners convert their garages
North Warwickshire homeowners applied 98 times to convert a garage from 2016 to October 2026. Atherstone (CV9) made 24, Polesworth and Kingsbury (B78) 23 and Coleshill (B46) 21.
Most conversions need no application, so these are only the ones that did.
Applications in each North Warwickshire postcode
- CV9 Atherstone24
- B78 Polesworth and Kingsbury23
- B46 Coleshill and Water Orton21
- CV7 Fillongley and Arley10
- CV10 Hartshill and Ansley6
- B76 Curdworth6
- B79 Shuttington5
Pins mark North Warwickshire postcodes and swell with the number of applications, 2016 to October 2026. Council records, gathered by PlanIt.
North Warwickshire garage conversions: your questions
Planning an annexe for a parent? Tell us when you get in touch and we will plan the visit around it.
Ask us a questionDo I need planning permission to convert my garage in North Warwickshire?
Mostly not. An inside conversion normally goes ahead without one. Ask the council first if the house is listed, sits in a conservation area, or if an extension is part of the plan. North Warwickshire Borough Council.
Can I turn my garage into an annexe in Coleshill or Atherstone?
Yes, and it is the room North Warwickshire applications named most. It stays part of your home when it shares the entrance, garden and bills. With a bedroom, shower room and kitchenette, one typically costs £33,500 to £54,000. Garage annexes and granny flats.
Will losing the garage cause a parking problem?
Rarely. In 141 refusal letters from eight local councils, losing parking was the reason only once.
Can I convert half the garage and keep the rest?
Yes. A partition wall, insulated and fire-resisting, gives you a room behind and keeps the front, with its garage door, for storage. Starting prices are usually around £9,000.
How long does a garage conversion take?
Two to four weeks on site covers most single garages. Annexes and shower rooms take longer. The visit is the time to ask how long yours will take.
Do you cover my village?
Yes: Coleshill, Water Orton, Atherstone, Polesworth, Dordon, Kingsbury, Hartshill, Fillongley, Curdworth and the villages around them.
Get a price for your garage in North Warwickshire
Tell us your town or village and what you have in mind for the garage.
- A visit first, to measure and talk it through.
- A written price before any work starts.
- Prices are shown above, so you can budget first.