“Loft Conversion Costs: The Ultimate Comprehensive Guide for now”

Loft Conversion Costs

Loft conversions are a popular way to add space and value to your home without the need for a major extension. They can be used to create additional bedrooms, home offices, or even playrooms. However, the cost of a loft conversion can vary widely depending on the type of conversion and the specifications required. This guide will provide a detailed overview of the various factors that affect loft conversion costs, average prices, and what to expect during the process.

Understanding Loft Conversion Costs

What Influences the Cost of a Loft Conversion?

Several factors influence the cost of a loft conversion, including:

  • Type of Conversion: The most significant factor is the type of loft conversion you choose. Options include dormer loft conversions, mansard conversions, hip-to-gable conversions, and roof light conversions.
  • Size of the Loft: The overall size and dimensions of your loft will affect the amount of materials and labor required.
  • Structural Requirements: Some lofts require additional structural support or modifications, which can increase costs.
  • Finishes and Fixtures: The quality of finishes, fixtures, and fittings you choose will also impact the final price.
  • Location: Costs can vary depending on your location, with loft conversions in London and the South East typically costing more than those in other parts of the UK.

Average Cost of a Loft Conversion

The average cost of a loft conversion in the UK can range from £20,000 to £60,000. Here’s a breakdown of different types of conversions and their typical costs:

  • Basic Loft Conversion: £20,000 – £25,000
  • Dormer Loft Conversion: £30,000 – £50,000
  • Hip-to-Gable Loft Conversion: £40,000 – £60,000
  • Mansard Loft Conversion: £45,000 – £70,000

Loft Conversion Cost per m²

On average, the cost of a loft conversion per square meter (m²) ranges from £1,200 to £2,500. This price can increase based on the complexity of the work and the quality of materials used.

Dormer Loft Conversion Costs

A dormer loft conversion involves extending the roof to create additional headroom and floor space. This is one of the most popular types of loft conversions due to its versatility and the extra space it provides.

  • Dormer Loft Conversion Cost: The cost of a dormer loft conversion typically ranges from £30,000 to £50,000.
  • Dormer Loft Conversion Price: Depending on the specifications and finishes, prices can vary, but you can expect to pay around £40,000 on average.
  • Cost of a Loft Conversion with Dormer: If additional structural changes are required, such as reinforcing the roof, costs can increase to £60,000 or more.

Attic Conversion Costs

Attic conversions can be a cost-effective way to add extra living space to your home. The costs associated with converting an attic can vary based on the complexity of the project and the desired finishes.

  • Attic Conversion Cost: The cost of converting an attic typically ranges from £20,000 to £40,000.
  • Attic Conversion Price: Depending on your requirements, the price can fluctuate. However, the average price is usually around £30,000.
  • Attic Loft Conversion Cost: For a standard attic loft conversion, you can expect to pay between £25,000 and £35,000.

Specific Costs for Different Loft Conversion Types

Dormer Loft Conversion Costs

  • Cost Dormer Attic Conversion: The cost of converting an attic with a dormer extension ranges from £35,000 to £55,000.
  • Cost Loft Conversion with Dormer: Including all necessary structural work and finishes, the total cost can reach up to £60,000.
  • Cost of Loft Conversion Dormer: The average cost of a dormer loft conversion is around £45,000.
  • Cost of Loft Conversions with a Dormer: Depending on additional features and complexity, this cost can vary but generally falls between £40,000 and £60,000.

Simple and Basic Loft Conversions

For those on a tighter budget, basic and simple loft conversions are an attractive option.

  • Basic Loft Conversion Cost: A basic loft conversion, which typically includes adding a roof light and basic insulation, costs around £20,000 to £25,000.
  • Simple Loft Conversion Cost: For a straightforward conversion with minimal structural changes, you can expect to pay between £25,000 and £30,000.
  • Low Cost Loft Conversion: By opting for fewer custom features and simpler finishes, you can keep costs as low as £20,000.

Loft Room Conversion Costs

Creating a functional room in your loft space can vary in cost depending on the room’s purpose and the level of finish required.

  • Loft Room Conversion Cost: Converting a loft into a habitable room costs between £20,000 and £40,000.
  • Average Cost of Converting a Loft: On average, converting a loft into a bedroom or office will cost around £35,000.
  • Average Cost to Convert a Loft: Including all finishes and necessary building regulations, you can expect to pay approximately £30,000.

Converting a Bungalow Loft

Bungalows are prime candidates for loft conversions due to their single-story layout, which provides ample roof space.

  • Converting a Bungalow Loft: Costs for converting a bungalow loft typically range from £25,000 to £45,000.
  • Average Cost of Loft Extension: For a bungalow loft extension, expect to pay around £35,000 to £50,000.

Detailed Breakdown of Costs

Planning and Design Costs

Before any construction work begins, you need to account for planning and design costs. This includes:

  • Architect Fees: £1,000 – £3,000
  • Planning Permission: £200 – £400 (if required)
  • Structural Engineer Fees: £500 – £1,000

Construction Costs

Construction costs form the bulk of your loft conversion budget. These include:

  • Labour: £10,000 – £25,000, depending on the complexity and duration of the project.
  • Materials: £5,000 – £15,000, depending on the quality and quantity required.
  • Structural Work: £2,000 – £10,000, which can include reinforcing the roof and floor.

Finishing Loft Conversion Costs

The cost of finishes can vary widely based on your preferences and the level of luxury you desire.

  • Electrical Work: £1,000 – £3,000, including lighting, sockets, and switches.
  • Plumbing: £1,000 – £3,000, especially if adding a bathroom.
  • Insulation: £500 – £1,500, for thermal and sound insulation.
  • Flooring: £500 – £3,000, depending on the type of flooring chosen.
  • Decorating: £1,000 – £5,000, including painting, plastering, and other decorative elements.

Additional Loft Conversion Costs

There are several additional costs that you may need to consider:

  • Building Regulations Approval: £500 – £1,000
  • Party Wall Agreement: £700 – £1,200 (if required)
  • Contingency Fund: It’s wise to set aside 10-15% of your total budget for unexpected expenses.

Financing Your Loft Conversion

Savings and Personal Loans

Using savings or taking out a personal loan are common ways to finance a loft conversion. Personal loans typically have fixed interest rates, making budgeting easier.


Remortgaging your property to release equity is another popular option. This involves taking out a new mortgage that’s larger than your existing one, with the difference providing the funds for your loft conversion.

Home Improvement Loans

Specialized home improvement loans are designed specifically for renovations and extensions. These loans often have lower interest rates and more flexible repayment terms compared to personal loans.

Government Grants

In some cases, government grants may be available for home improvements that increase energy efficiency or accessibility. Check with your local council to see if you qualify for any grants.

Benefits of Loft Conversions

Increased Property Value

One of the most significant benefits of a loft conversion is the potential increase in property value. A well-executed loft conversion can add up to 20% to the value of your home.

Additional Living Space

Loft conversions provide much-needed additional living space without the need to move. Whether it’s an extra bedroom, a home office, or a playroom, the possibilities are endless.


Compared to other types of home extensions, loft conversions are relatively cost-effective. They utilize existing space, which means fewer materials and less labor are required.

Energy Efficiency

Modern loft conversions often include high-quality insulation, which can improve the overall energy efficiency of your home. This can lead to lower energy bills and a more comfortable living environment.

Potential Challenges and Considerations

Planning Permission

Not all loft conversions require planning permission, but it’s essential to check with your local planning authority. Generally, straightforward conversions fall under permitted development rights, but larger or more complex projects may need formal permission.

Structural Integrity

Before proceeding with a loft conversion, it’s crucial to ensure your property’s structure can support the additional weight. This typically involves reinforcing the floor and roof.


Loft conversions can be disruptive, especially during the construction phase. It’s important to plan for potential disruptions and consider temporary accommodation if necessary.

Access and Headroom

Ensuring adequate access and headroom is essential for a functional loft conversion. This may involve adding a staircase and modifying the existing roof structure.


A loft conversion is a fantastic way to add space and value to your home. By understanding the Loft Conversion Costs involved and planning carefully, you can achieve a successful conversion that meets your needs and budget. Whether opting for a basic loft conversion or a more complex dormer extension, the investment is often worthwhile, providing additional living space and increasing your property’s value.


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