Change back door to a window

Question

Considering buying a house, but I will need to make the most out of the space in a small kitchen as there's not enough room for a washing machine. So i'm thinking of removing the back door to the garden, bricking it up halfway, then putting a new window in on that wall above the sink and washing machine. Leaving the plumbing in place. 

How much would that cost? 

I am also then considering changing a living room window into a single back door, to regain access to the back garden. How much would that cost? 

Thanks!

Nicholas · Answer

Here’s a rough estimate for both jobs:

1. Removing the Back Door & Installing a Window Above the Sink
	•	Bricking up halfway: £400–£800 (depends on materials and finish)
	•	New window supply & install: £500–£1,200 (uPVC being the cheaper option, aluminum or timber being more expensive)
	•	Plastering & finishing inside: £200–£500
	•	External render or brick matching: £300–£800 (depending on finish)
	•	Total estimated cost: £1,400 – £3,300

2. Changing a Living Room Window into a Back Door
	•	Removing the existing window: £100–£300
	•	Cutting down the brickwork for door opening: £500–£1,000 (structural work, may need a lintel)
	•	New door supply & install: £800–£2,000 (material choice matters—uPVC is cheaper than composite or aluminum)
	•	Making good internal & external finishes: £300–£800
	•	Total estimated cost: £1,700 – £4,100

Total for Both Jobs:
	•	Low-end: ~£3,100
	•	High-end: ~£8,400

All rough estimates depending on various factors; Final cost will depend on materials, location of the work area, and any unexpected structural work.

Change back door to a window

Follow Us

Cookies

Manage Cookies

Essential cookies

Analytics & Tracking

Advertising