How Much Does A
Loft Conversion Cost
The loft conversion cost can vary based on your property type, but we've made it easier to get a clear estimate with our comprehensive guide and cost calculator. Below, you’ll find examples of common loft conversions in London properties, each with typical pricing information to give you a sense of what to expect.
Our loft conversion cost calculator is designed to take the guesswork out of budgeting, especially for London properties where prices can vary widely. Simply select the type of loft conversion you're interested in, and you’ll see detailed, tailored information based on your unique needs.
We know planning a loft conversion can be daunting, so our tool also includes 3D models to help you visualise your transformed space. Explore different loft conversion options, break down each cost component, and see exactly how your new loft could bring added value, style, and space to your home.
Loft Conversion Cost Examples
Dormer
Loft Conversion Costs
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Tile Loft Conversion
Plain Tiles Dormer
UPVc Windows
Plaster Finish
Estimated Cost: £50,000
Slate Loft Conversion
Fibre Cement Dormer
Aluminium Windows
Plaster Finish
Estimated Cost: £53,000
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Zinc Loft Conversion
Zinc Cladding Dormer
Aluminium Windows
Plaster Finish
Estimated Cost: £55,000
Dormer Loft Conversion
Plain Tiles Dormer
UPVc Juliet Balcony
Decorating
Estimated Cost: £53,000
Dormer Loft Conversion
Fibre Cement Dormer
Aluminium Juliet Balcony
Decorating
Estimated Cost: £58,000
Dormer Loft Conversion
Zinc Cladding Dormer
Aluminium Juliet Balcony
Decorating
Estimated Cost: £60,000
Plain Tiles Dormer
UPVc Windows
Plaster Finish
Estimated Cost: £55,000
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Fibre Cement Dormer
Aluminium Windows
Plaster Finish
Estimated Cost: £58,000
Zinc Cladding Dormer
Aluminium Windows
Plaster Finish
Estimated Cost: £63,000
Hip to Gable
Loft Conversion Costs
A hip-to-gable loft conversion is a popular choice for London homeowners with properties that have a hipped roof (a semi-detached property). This conversion extends the roof by straightening one side into a vertical wall, or "gable," creating additional space and making it ideal for properties with limited headroom. The cost of a hip-to-gable loft conversion in London typically ranges between £55,000 and £65,000, depending on the property size, location, and specific features you choose. This price generally covers structural work, insulation, flooring, windows, and basic interior finishing. Because it requires more complex roofing adjustments, the hip-to-gable loft conversion is usually more expensive than a simple dormer loft conversion. However, it offers a significant increase in floor space, often making room for an extra bedroom, bathroom, or office. Factors like location, access, and design complexity can also impact the final cost. Using our loft conversion cost calculator to get a tailored estimate is recommended.
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Tile Hip to Gable
Loft Conversion
Plain Tiles Dormer
UPVc Juliet Balcony
Decorating
Estimated Cost: £58,000
Slate Hip to Gable
Loft Conversion
Fibre Cement Dormer
Aluminium Juliet Balcony
Decorating
Estimated Cost: £65,000
Zinc Hip to Gable
Loft Conversion
Zinc Cladding Dormer
Aluminium Juliet Balcony
Decorating
Estimated Cost: £68,000
L Shape
Loft Conversion Costs
Tile L Shape
Loft Conversion
Plain Tiles Dormer
UPVc Windows
Plaster Finish
Estimated Cost: £60,000
Fibre Cement L Shape
Loft Conversion
Fibre Cement Slate Dormer
Aluminium Windows
Plaster Finish
Estimated Cost: £65,000
Zinc Cladding L Shape
Loft Conversion
Zinc Cladding Dormer
Aluminium Windows
Plaster Finish
Estimated Cost: £70,000
An L-shaped loft conversion is a fantastic option for those looking to maximise space in London properties, particularly for Victorian and Edwardian homes with existing rear extensions. This type of conversion creates an "L" shape by building two dormers, one on the main roof and another on the rear outrigger, connecting them to form a larger, cohesive space. The cost of an L-shaped loft conversion in London typically falls between £60,000 and £80,000, although the final price can vary based on property size, design choices, and location. This cost generally includes structural work, insulation, windows, and interior finishes like flooring and lighting. Due to the complexity and the increased floor area it provides, an L-shaped loft conversion tends to be more expensive than standard dormer or hip-to-gable loft conversions. However, it’s an excellent investment for those looking to add multiple rooms, such as a master suite with an en-suite bathroom or even a small office.
Using our loft conversion cost calculator, you can get a precise estimate tailored to your requirements.
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Plain Tile L Shape
Loft Conversion
Plain Tiles Dormer
UPVc Windows
Decorating
Estimated Cost: £65,000
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Fibre Cement L Shape
Loft Conversion
Fibre Cement Slate Dormer
Aluminium Windows
Decorating
Estimated Cost: £70,000
Zinc Cladding L Shape
Loft Conversion
Zinc Cladding Dormer
Aluminium Windows
Decorating
Estimated Cost: £75,000
Loft Conversion Cost Calculator
Use our unique calculator below to get your loft conversion price
A dormer loft conversion is one of the most popular options for homeowners looking to expand their living space in London. The cost of a dormer loft conversion typically ranges from £50,000 to £60,000, depending on the property's size, location, and specific design requirements. This price usually includes structural modifications, insulation, windows, and finishing touches like plastering and electrical work. While costs in London tend to be on the higher end due to demand and labour costs, a dormer loft conversion can add substantial value to your property, providing extra headroom and floor space, often with room for an additional bedroom and bathroom. For a more accurate estimate tailored to your needs, use our loft conversion cost calculator, as factors such as roof structure, access, and finishes can all influence the final price.
