Loft Conversion Prices

Typical costs involved when converting roof space

Like with all building projects loft conversion prices vary considerably depending on the size of the garage, house or bungalow being converted and the quality of the finish looking to be achieved. Although the loft is already there, a huge amount of timber and other materials are needed to safely construct a decent room that satisfies the building regulations.

The most important part of any construction project is setting a budget, and then sticking to it. Whether looking to get a specialist company in or looking for the prices that will be associated when planning a DIY attic conversion the process is the same. A popular option among keen DIYer's is to get a specialist loft conversion company to carry out the structural work. Click here to see what is involved in the structural work and what would be left to do if a company completed the structure for you.

Average costs

A simple bedroom loft conversion in a typical 3-bedroom terraced house can cost around £30,000. A four bedroom detached house with an attic conversion made up of two rooms and a bathroom could cost upwards of £45,000 from start to finish.

There are other variables that will increase the price like adding pitched roof dormer windows (£3.5k+ ea), a flat roof dormer(£7k+), taking the roof up from a hip or barn hip to a gable design (£10k+), adding wardrobes (£500+each).

Other associated loft conversion costs

  • Submitting plans for approval and building inspector costs £300-500
  • Architect fees from £500
  • Scaffolding
  • Skips 3+ at around £200 each
  • Labour (electrical, plumbing, plastering, ceramic tiling)
  • Materials
  • Crane to lift steels
  • Decoration
  • Carpets
  • Don't forget to allow for about 300 tea bags, 5 gallons of milk, 1kg sugar and lots of biscuits ;-)

    Adding an en-suite

    Adding an en-suite bathroom will significantly increase the price of the loft conversion. Although to build it only requires a couple of stud-work walls, a door and frame, there is also the bathroom suite, plumbing + tiling parts and labour then decorating too. If having the attic conversion constructed by a specialist company expect to pay an extra £5,000+ for a bathroom.


    Many loft conversions won't easily accomodate standard free standing wardrobes. A good idea during the construction is to build fitted wardrobes out of studwork and have normal or sliding doors fitted to save space. There are some storage ideas here.

    Other pages related to loft conversion prices

    Recommended Loft conversion books

    Back to main loft page

    Have a comment or question about loft conversion prices?