Thinking about a loft conversion in 2025? You are not alone. For many UK homeowners, a loft conversion is one of the smartest ways to unlock extra living space without eating into the garden or going through the upheaval of moving. But one question always comes up: how much does a loft conversion cost in the UK?
The truth is, there is no one-size-fits-all answer. While many companies throw around square metre estimates, the reality is that loft conversion cost per m² in the UK can vary significantly depending on your home, your goals and the type of conversion you choose.
So rather than focus on price ranges that can quickly go out of date, let’s look at what really affects the cost – and how to plan a realistic budget that works for you.
There’s no such thing as a standard loft conversion price!
It can be tempting to search for a ‘typical’ loft conversion cost online. But a quick online search will give you a huge range of figures – and that’s because no two loft conversions are alike.
While a rough loft conversion cost per-m² estimate might help with very early planning, it can be misleading. Costs can shift depending on everything from your property’s roof structure to your finish choices. It’s always better to work with a reputable loft conversion specialist who can provide a tailored quote based on your home and requirements.
What affects the cost of a loft conversion?
So, what are the biggest factors influencing how much your loft conversion might cost?
- Type of conversion – A simple rooflight-only loft conversion will cost less than a dormer or hip to gable extension, which requires more structural work. Mansard conversions tend to be at the higher end due to extensive alterations.
- Existing roof structure – Trussed roofs, shallow pitches, or limited head height can mean additional steelwork or lowering the ceiling below.
- Staircase design and location – Clever loft stair design can save space, but awkward layouts can require additional remodelling.
- Windows and doors – The number, type, and size of loft windows and doors (such as Velux or dormer-style) will all affect costs.
- Plumbing and electrics – Adding an ensuite bathroom, or rerouting pipework and wiring, can increase your overall spend.
- Finishing choices – Standard vs premium fixtures, custom joinery, built-in storage or underfloor heating can all push up the final price.
In short, it’s not just about the size of your space. It is about how complex the project is, and how you want the final room to look and feel.
Loft budget planning – what else should you factor in?
It’s easy to get caught up in the core build cost, but loft budget planning means looking at the full picture. That includes:
- Design and architectural services (if not included in your build package)
- Planning permission fees, where required – particularly for larger dormers or changes to the roofline
- Structural engineer reports – often needed if you are altering the roof or removing internal walls
- Finishes – such as flooring, tiling, paintwork, and lighting
- Furnishings – especially if you are creating a high-use space like a master bedroom, children’s room or home office
Also bear in mind that quotes can differ based on what they include. Some attic conversion companies provide a full turnkey service, while others may quote only for the structural shell. It is always worth checking the fine print before comparing prices.
Why cheaper isn’t always better
When comparing quotes, it’s natural to gravitate towards the lower numbers. But cheapest doesn’t necessarily mean best – and can sometimes end up costing you more in the long run.
Look at what's included, the materials being used, and how much experience the team has. A specialist loft conversion company like Bespoke Lofts will always prioritise safety, quality, and a finish that truly works for your home.
More loft budget planning – how to get the most for your money
A smart design can go a long way. Here are a few ideas to make the most of your investment:
- Prioritise function – A well-designed space with clever storage may give you more long-term value than a larger, less practical room.
- Phase the project – If budget is tight, consider completing the shell first, then adding extras (like bespoke wardrobes or luxury finishes) later.
- Work with your space – A straightforward dormer conversion is often a great balance between cost and usable space.
- Think resale – Adding an ensuite or increasing head height could potentially add value to your home if you ever decide to sell.
Bespoke design also means your loft will work around your lifestyle – and not the other way around.
Ready to plan your loft conversion with confidence?
There is no universal answer to how much a loft conversion costs in the UK. But understanding what affects the price – and planning your loft conversion cost per m² realistically – will put you in a strong position to budget with confidence.
At Bespoke Lofts, we know that every home is different. That’s why we take the time to understand your needs and give you honest advice on what is achievable within your budget. From concept to completion, we’ll help you plan a loft conversion that feels like a natural part of your home – and your life.
Get in touch with Bespoke Lofts today to arrange your free, no-obligation consultation. Let us help you make the most of your loft space – the smart way.