How much do loft conversions cost?

It's important to note that these figures are just averages, and the actual cost will depend on the specific details of the project. Factors that can affect the cost include whether the loft is built from scratch or converted from an existing space, the level of insulation and soundproofing required, the inclusion of additional features like an en-suite bathroom, and any structural modifications needed.

Another source, Checkatrade, provides an average cost for a loft conversion in the UK. They state that a typical loft conversion in the UK can cost around £50,000. However, it is important to note that regional variations and individual project requirements can significantly impact the final cost.

To get an accurate estimate for your particular project, it is recommended to consult with reputable contractors or builders who can assess your specific requirements and provide you with a detailed quote.

Different loft conversion types will also effect the cost:

As of my last knowledge update in January 2022, here are some rough cost ranges for different types of loft conversions in the UK based on each conversion:

HIP TO GABLE REAR DORMER

Hip to gable loft conversion is mostly found on semi-detached properties with an existing hipped roof. The hip is extended up vertically from the ridgeline to create a gable and a Rear Dormer is formed to the rear of the property. This type of loft conversion maximises floor space and head height and is one of the most common types of loft conversion.

Cost Range: £40,000 - £60,000

SIDE DORMER

A Side Dormer is the same shape as a Rear Dormer but is situated on the side of the property. If your house is detached, you may have the option of having two side dormers. Side Dormers usually have flat roofs but, dependent on the local planning policies, may have pitched or crown roofs.

Cost Range: £30,000 - £50,000

PIGGYBACK LOFT CONVERSION 

A Piggyback loft conversion is formed by raising the existing perimeter walls in brickwork and pitching a new roof, which is stepped back from the front elevation of the property. By raising the brickwork and pitching a new roof a vast amount of head height is gained, as well as more living space. Typically, these kind of loft conversions can facilitate two bedrooms and a bathroom.

MANSARD LOFT CONVERSION 

Mansard loft conversions are of a similar external shape to the Rear Dormer as they have a flat roof but the face of the Mansard is sloped by 70 degrees. The sides of the Mansard are typically built up in brickwork but can be tile hung. Although a Mansard is often more aesthetically pleasing, internally they have slightly restricted head height and floor space in comparison to a Dormer loft conversion as the face is sloped by 70 degrees. Mansard loft conversions are often found on terraced properties within the Central London area, this is due to their local planning policies.

Cost Range: £45,000 - £70,000 and above

L-SHAPE DORMER 

An L-Shape Dormer is of similar construction to a Rear Dormer with an additional back addition outrigger at the rear of the property. This usually extends over an existing first floor bathroom or bedroom. This type of loft conversion is not possible on all types of properties but is commonly found on those of the Victorian and Edwardian era. The back addition outrigger adds a vast amount of living space to the loft conversion with either the same head height as the main dormer or a slightly reduced head height due to local planning policies.

Cost Range: £30,000 - £50,000

VELUX LOFT CONVERSION

A velux conversion is built within the existing roof slope with only the addition of velux roof lights externally. This type of loft conversion is typically found on detached properties with a large existing head height such as Bungalows.

Cost Range: £20,000 - £30,000

PITCHED DORMERS

Pitched dormers are very aesthetically pleasing and are often found on properties with a large existing roof space. Pitched dormers can be used to provide additional head room within certain parts of the loft in order to accommodate features such as the new loft stairs.

The cost of a loft conversion can vary significantly based on various factors, including the type of conversion, the size of the loft, location, and the level of finish and specifications. It's important to note that the figures provided are general estimates, and actual costs can vary based on individual circumstances.

These estimates typically include the cost of design and planning, structural work, insulation, roofing, windows, stairs, and interior finishes. However, additional costs may arise for factors such as bespoke features, high-end finishes, or unexpected structural issues.

Conclusion:

It's crucial to consider budgeting for potential contingencies to accommodate any unforeseen issues that may arise during the construction process. Architecture 365 undertake a thorough analysis of requirements alongside maintaining regulations. We provide free quotes and advice. Please get in touch today to discuss your requirements.

*Keep in mind that these figures are general estimates and may have changed since my last update. For the most accurate and up-to-date information, it is advisable to consult with us so we can provide tailored estimates based on your specific needs and the current market conditions.