How Much Does A Loft Conversion Cost in 2025
10, Jan, 2025
Loft conversion cost might be one of the first things that come to your mind as you decide to utilize your extra roof space. You don’t have to worry more when Denham Crescent, Ltd is here to assist you. You will be happy to know that loft conversion is a cost-saving idea as it saves you from the trouble of moving to a larger space besides saving your money. But before breaking down the cost, let’s find out why you need a loft conversion.
Why to Get a Loft Conversion
You may know that loft conversion is an area under a house's roof converted into a living space, usually a bedroom. A loft conversion is an excellent option for homeowners who want more living space but do not want to increase their home's footprint. Loft conversions are a great way to make the most of limited house space, whether for expanding families, starting a new hobby, or just seeking a quiet place to work from home. In cities, where building expansions are sometimes not allowed, a loft conversion is an excellent option for those who want more living space, wish to increase the value of their home, or simply want a room with a view.
Loft Conversion Cost in 2024
Spending as little as £15,000 to 17,000 is possible for a small, simple loft conversion. An additional £18,000 to £25,000 is reasonable to expect to pay for a medium-sized loft conversion that creates windows and a double bedroom. The going rate for a spacious master bedroom with an en-suite is between £25,000 to £40,000.
Loft Conversion Cost Per M2
The loft conversion cost will differ from one London, UK, region to another. A considerable percentage of the expected cost will be determined by the type of loft conversion, the need for planning permission, and the technological limitations imposed on it.loft conversion cost per m2 is typically between £2,400 and £4,000 , excluding finishes like flooring, windows, and sanitary ware.
So, we can say that the cost of loft conversion per square meter primarily depends on the following factors;
- Loft conversion types
- Material Cost
- Roof type
- Roof size and area
- Finishing options
- Location
- Need of planning permission
Types of Loft Conversion and thier Cost
Several factors, including your choices, will determine the cost of converting a loft conversion. The price ranges are broad because it is an extensive project. The type of loft conversion you choose will determine the final cost.
Velux Loft Conversion Cost
With minimal damage to the preexisting loft area, a Velux loft conversion is simple and inexpensive. Their lack of extra space is the sole drawback they offer. A Velux loft conversion is ideal for homes with spacious existing lofts because the roof structure does not need to be altered.
A Velux loft conversion typically costs about £27,500.
Roof Light Loft Conversion Cost
To make the loft more naturally lit, roof light windows are set up on the roof. The fundamental components are floor strengthening, flooring, insulation, plasterboarding, and roof light installation. In most cases, they can be built legally outside conservation areas and other special zones. Fewer renovations are required for a roof light conversion. The end product might be simplistic in case of the lack of funds for plumbing, major electrical work, etc.
In London, UK, a roof light loft conversion might cost anything from £40,000 to £60,000.
Dormer Loft Conversion Cost
Dormer designs are a good option for loft conversions where extra headspace is a priority. A great way to add extra space to your home is to build dormer window structures that project from the top.
A dormer loft conversion typically costs around £50,000.
Hip to Gable Loft Conversion Cost
You can convert your loft from a hip to a gable to provide more living space. An additional box effect is created on the roof by extending the existing top line to the exterior of the building. This type of loft conversion is only feasible on detached or semi-detached homes with sloping roofs. A double hip-to-gable loft conversion is a common way for homeowners of detached houses to increase the space available on top of their residence.
Loft conversions on hip-to-gable homes typically cost around £60,000.
Mansard Loft Extension Cost
When you convert a mansard loft into a living area, you'll have a level roof and slightly sloping exterior walls on either side. With its ability to expand, adding a floor to an existing structure is possible. Planning permission is always necessary, as it is a significant structural change.
Regarding loft conversion plans, this is the most expensive type of loft.
If you're just thinking about the loft space, the average cost of a mansard extension might range from £110,000 to £160,000.
Breakdown of Loft Conversion in the UK
Below is a detailed breakdown of the standard costs for an average loft conversion in London, UK. It will help you budget for the various aspects of your loft conversion project. Here, we will give you a rough estimate of costs because the exact cost can be estimated after a site visit.
Loft Conversion Stairs Cost
As one of the most essential components of a loft conversion, the staircase can take several forms and come in a wide range of prices.
The price per square meter is the basis for the costs in this guide.
You may expect to pay between £1,500 and £1,000 for a simple staircase.
The price range for custom-built stairs is £5,000 to £10,000.
The average cost for a spiral staircase is between £2,500 and £9,500.
On average, homeowners looking for a unique set of stairs may expect to pay between £400 and £850 per tread for alternating treads.
Lastly, you can install a fixed ladder with a handrail for the least amount per square meter. This option typically costs between £200 and £500.
Loft Conversion Insulation Cost
You must ensure that your loft is adequately insulated. Various insulations have different prices.
The average rate for sheet insulation is about £15 to £30 per square meter.
Prices for loose-fill insulation range from about £7.50 to £15.00 per square meter.
Insulating with blankets will cost around £14 to £29 per square metre.
Loft Conversion Designing Cost
Loft conversions require building regulation drawings. Your design expenses vary greatly based on the architects you hire and the design's complexity.
Design fees for a basic loft conversion are £3,000–£6,000.
Budget for structural calculations, such as if a new beam or other structural changes are needed. Structural design costs £1,800–£3,600 for a basic loft conversion.
Design and drawings for a loft conversion planning application cost £4,800–£10,000.
You can employ a design-and-build business to quote your loft conversion, including design fees. In some circumstances, design and build quotes include planning fees.
Loft Conversion Labour Cost
The labor cost will be a significant factor in the final price estimate for your loft conversion. The labor costs might increase quickly because you'll need experts to complete the various tasks.
Total labor costs for a loft conversion can range from £14,000 to £35,000, depending on the project's size and complexity.
Building artisans, tilers, plasterers, and designers all charge between £25 and £35 an hour, just to give you an idea of what other professionals in the area charge.
Hourly rates for licensed professionals, including plumbers and electricians, range from around £35 to £50.
Additional Costs in Loft Conversion
If you want to keep your loft conversion budget under control, there are a lot of additional costs to think about, such as:
General Building Material Cost
Underfloor Heating Cost
Building Regulation Cost
Architect Plan Costs
Building Control Cost
Condition of the Existing Building
Party Wall Cost
If you are looking for a professional who can do a complete loft conversion for you, then Denham Crescent, Ltd is willing to assist at a very competitive rate. You will find our work which complies with your taste and budget. If you want an expert opinion, please contact us at 0203 291 1786 or enquiries@denhamcrescent.co.uk to discuss your concerns freely with our professionals.
FAQs
Do I Need Planning Permission For a Loft Conversion
Not usually. For simple loft conversion, you don’t need planning permission. However, if you plan on extending beyond the specified conditions or have a listed property, you'll need planning permission.
How Much Should You Spend On a Loft Conversion
When planning a loft conversion, consider how much value it will contribute. Local estate agents can help you determine the sale price of loft-expanded homes in your area.
Design solutions, finishes, space, lighting, etc., can be chosen based on investment return.
This is an excellent method to keep on budget and know the extension is worth it.
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