How much does it cost to convert a loft?

PLEASE NOTE: The figures shown are approximate.

A basic Velux loft conversion will cost approximately  £32,000 (including VAT@20%).

A large flat roof dormer,  additional £9,000-£15,000 (including VAT@20%).

A small pitched roof dormer, additional £3,000-£5,000 (including VAT@20%).

A hip to gable wall construction, additional £8,000-£11,000 (including VAT@20%).

An en-suite bath/shower room, additional £4,000-£5,000 (including VAT@20%).


Can my loft be converted?

Almost all lofts can be converted, however, it does depend on the height of the apex (top of part of roof).  A required minimum head height of 2.500 metres from ceiling to the apex is needed for a modern truss roof, and 2.400 metres for a traditional cut and pitch style roof. If your roof is not high enough then a dropped landing to the top staircase or lowering the ceilings to the 1st floor may be required. If your property is detached then raising the roof should be considered. Further information is available on our Types of Roof page.


How long will my conversion take?

It usually takes 5 to 9 weeks to complete depending on the size of the project. An approximate time will be given when our surveyor carries out your free feasibility survey. When we have designed your loft conversion we will provide start and completion dates with the quotation.

Frequently asked questions for loft conversions
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For Your FREE Feasibility Survey Call 023 9270 6150

Will we need planning permission?

Most loft conversions do not require planning permission, especially if the shape of the roof is not changing. If the architecture design includes a dormer and/or gable wall construction within the Permitted Development Rules then planning permission isn’t required.

However, if the design does require planning permission then the architecture will need to meet certain standards and criteria. We will advise you during the initial survey if planning permission is necessary for your loft conversion. More information about this can be read on our Assessment Criteria page.


What forms will we need to apply for Planning Permission and Building Regulations?

We will take responsibility for completing the forms for all the relevant consents necessary.


Will we need to move out while the work is in progress?

No, this is not necessary as most of the work carried out is above the normal living area of the house. However, it is recommended that you go out for the day when the stairs are installed!


Is there a written contract?

Yes a written contract and full detailed schedule of works is supplied. A 5% deposit is required before work commences. During the works payments are invoiced at equal weekly amounts. A progress Gantt chart is provided to keep track of your payments and work completed.


Will I need a dormer?

Almost all loft conversions can have a dormer window, which can provide useful extra space in a smaller loft, add light and outlook to a room. Some smaller lofts may require a dormer at the top of the stairs to provide the necessary headroom as you climb the stairs into your new upper floor.


Do you carry out other building work?

Yes, if you are having a loft conversion and you are considering other building work such as an extension or a conservatory and any other minor alterations. This can save on project management costs.


We are not having a dormer constructed so will we need scaffolding?

Yes, with all of our conversions scaffolding is erected even without a dormer conversion. This allows us to transport all the materials safely through the roof.


Will we need a crane to lift the heavy items into the loft?

Almost all loft conversions require a crane or hoist to lift the heavy steels and materials into the loft. If a crane is required we will included the hire costs in our quotation.

For Your FREE Feasibility Survey Call 023 9270 6150

Book your appointment using our online booking service