Loft Conversion Costs

How much a loft conversion costs will depend on the type of loft conversion the property needs The information listed below will give you a good idea of the costs for the differing types of loft conversions.  

Rear Dormer Conversion


The average rear dormer loft conversion costs will be around £35,000 + VAT.

Price range: £32,000-38,000+VAT

Velux / Eaves Conversion 


To create a loft conversion within the current roof space without the need for creating dormer.

Price range: £24,000-£29,000+VAT


Rear Mansard Conversion


An average mansard loft conversion costs is £36,000 + VAT for a single level. For a split level loft the average cost is around £42,000 + VAT.

Price range: £36,000-42,000+VAT

Hip to Gable Conversion


Hip to gable loft conversion costs are around £39,000 + VAT.

Price range: £36,000-42,000+VAT



What’s included?

The above prices allow for all professional fees for the measured site survey, architectural plans and revisions. Also included are detailed working drawings, structural calculations, along with scaffolds on site protection & permits. All the materials and labour needed to construct your new loft conversion including all external roofing works, right through to the finishing off on the inside of the new loft room. leaving it to a plastered finished with all the 2nd fixing carpentry, electrics and plumbing completed, Ultimately leaving the room ready for decorating.


What’s not included?

Within the above stated prices the below has not been included for. Building control approval fees, these are paid directly by client to the local building control or approved building control company, you should allow £500-£600 including VAT. Planning permission fees, these are not normally required but if needed you should allow £180 payable to the local council on submitting plans. Party Wall Surveyor fees (if required). Bathroom suite, Decorating – unless quoted for initially and any upgrading the existing heating/ boiler system.


Find out more about loft conversion costs 

Whilst a lot of loft conversions are similar others can be varied also you might have more detailed ideas about your design and requirement to find out more call us on 020 8886 3249 or you can email us at .

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