Want to increase the size and value of your property? Then think about converting your unused loft space - get the latest average attic conversion costs here.
How much does a Attic Conversion cost?
Average cost in UK: £20k
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£12k
LOW COST
£20k
AVG COST
£25k
HIGH COST
The average cost for a Attic Conversion is £20000. You are likely to spend between £12500 and £25700 total. Exact price may vary depending on your area and project details.
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How Much Do Attic Conversions Cost?

For many homeowners, attic space is often left as half-empty storage, ignored for most of the year and ventured into only when some old, lost item needs to be retrieved from its corners. But if you’re struggling for a room downstairs, why not clear out all the old stuff and turn the extra space into something practical? A loft conversion is great if you’re in need of an additional bedroom, a study or office space, or even a quiet living area where you can relax by escaping the stress of life downstairs. Plus it works out as a great investment, even adding value to your property in the long run!

Before you begin, you should first check whether or not you need 

Attic Conversion Cost Summary:

  • Price Range = £14,900 to £25,700
  • Average Cost = £20,000
  • Cheapest Price = £12,500

Detailed Cost of Attic Conversion

Attic conversion costs vary depending on size and your design specifications but to help you get started, we’ve compiled the following list which gives a rough idea of recent attic conversion prices:

  • Structural Alterations: including strengthening via beam and joist installation, plus secured flooring and all joinery work will cost between £2,000 and £5,000
  • Insulation: roof and flooring if necessary, including all boarding and plastering will cost between £800 and £1,200
  • Windows: two small or one large velux-style skylights, double glazed will cost between £1,800 and £3,500
  • Bathroom installation: including plumbing and pipework, plus toilet and single washbasin fittings costs between £6,000 and £8,000
  • Wiring and electrics: including all lighting facilities and two power sockets costs between £3,500 and £5,000
  • Painting and decorating: interior design, paint, wallpaper and all minor fixtures and fittings costs between £800 and £3,000.
    • TOTAL ATTIC CONVERSION COST: £14,900 to £25,700

Of course, these figures just outline the average cost of an attic conversion; for more specific and accurate details regarding your particular property and loft design, you should contact a fully qualified surveyor or loft conversion company to carry out a preliminary inspection to help you reach quotes more suited to your loft conversion plans.

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