What is the typical cost of a loft conversion?

If you are currently or have ever considered a loft conversion, there are a few things you should be aware of. From cost-implicating factors and types of conversions, right through to additional considerations, we’ve broken it all down so that you don’t have to.

Cost affecting factors

Naturally, the cost of a loft conversion isn’t really a one-size-fits-all - there are plenty of components that will weigh in on this, including:

• The type of loft conversion - there is unsurprisingly a price difference between a simple rooflight versus a full dormer or mansard
• The size of the loft/house - naturally, a larger project will cost more
• The location - where you’re based will also impact the hit on your wallet, with conversions in London and the South East, for instance, often more expensive
• The finishes and materials - your expectations regarding basic versus high-end interiors will also impact the price you pay
• Planning permission/structural changes - you will likely see costs on the rise if the roof structure needs altering or if planning permission is required

Different types of loft conversions

Many will be unaware of the variety of loft conversions available, depending on your needs and price range. With some naturally more popular than others, it’s worth taking note of the options available to you.

Rooflight (Velux) Conversion

First up is your rooflight conversion, a great choice if you’re looking to make a change but on a smaller budget. This conversion is the most cost-effective choice, as it just adds windows to your roof, rather than changing its shape.

Average cost*: £20,000 ro £30,000

Dormer Conversion

Next is the dormer conversion, and a popular choice among Brits. This type adds a box-like extension projecting from the roof and is a desirable option as it creates more headroom.

Average cost*: £30,000 to £50,000

Hip-to-Gable Conversion

You may not be familiar with the name, but you’ll more than likely have come across one in your time. This conversion extends the sloping side of the roof into a vertical wall, increasing floor space - making it a suitable choice for semi-detached or end-of-terrace houses.

Average cost*: £40,000 to £60,000

Mansard Conversion

The final and largest of the loft conversions is the Mansard, involving a major structural change to complete the job. As a result, the roof slope will be altered to a near-vertical angle, providing a full additional storey and therefore maximising space.

Average cost*: £50,000 to £70,000

Loft conversions are a great choice for several reasons, whether you’re looking for additional space or to add value to your home. However, there are a few final considerations to take note of before making the decision (and the payment).

• Planning permission is not always needed; however, if it is required, you should plan for fees of several hundred pounds.
• Building regulations are always required in loft conversions to monitor structural and fire safety, as well as insulation.
• Loft conversions often take between 6 and 12 weeks to complete, but this may vary depending on the complexity.

*costs are rough estimates and vary by region and specifications

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