Loft conversion cost near you

Loft conversion price guide for 2022

How much does a loft conversion cost? If you know your attic space is suitable for a loft conversion, you’re probably wondering how much it’s going to set you back. A loft conversion can add thousands to the value of your home and gives you a versatile space to use with your family.

The average cost of a loft conversion in 2022 is £40,000. It’s likely to take up to 12 weeks. But costs vary depending on the type of roof you have, your location and how big you’d like your conversion to be - so make sure you get a range of quotes from reputable tradespeople to ensure you’re paying a fair price.

In this guide, we’ll help you to get an idea of how much you’ll pay for a loft conversion by breaking it down into sections:

  1. Types of loft conversion

  2. Material costs for loft conversions

  3. Will I need planning permission?

  4. Cost example of a loft conversion

  5. How long does a loft conversion take?

Types of loft conversion

Loft conversion flat

How much a loft conversion costs will depend on the type of conversion you’d like. There are a few different types to consider:

Roof light conversion

A roof light, or Velux, conversion is usually the most cost-effective type of loft conversion. It’s also the least disruptive type as it involves adding a skylight window (the best-known brand is Velux), laying a suitable floor and putting in a staircase for access. This type of loft conversion is perfect if you want to use the space as a home office or separate living area for older children.

A roof light conversion is likely to take between 4 and 7 weeks, depending on the size of your loft.

Dormer

A dormer loft conversion is the most common type of loft conversion. It involves a builder extending your existing roof with vertical walls, so you get more floor space and can add more windows. Most properties with sloping roofs are suitable for a dormer conversion, but you should always check with a structural engineer or architect if you’re unsure.

Dormer conversions are ideal for creating an extra bedroom with an ensuite. The extra space and additional windows allows for more light to come in, so the room will feel even larger.

Expect a dormer loft conversion to take between 6 and 9 weeks.

Hip to gable conversion

A hip to gable loft conversion involves replacing one side of your sloping, hipped roof with a vertical end wall (a gable end), which increases the amount of space you have in your loft. Hipped roofs tend to have limited floor space so having a hip to gable conversion will help you to fit in a staircase alongside your living space without it feeling cramped.

However, it’s worth bearing in mind that hip to gable loft extensions are classed as major roof alterations, so you’ll need to apply for planning permission. You can also only have a hip to gable conversion if your house is detached or semi-detached. They generally take between 6 and 9 weeks to complete.

Mansard loft conversion

Mansard loft conversions are typically the most expensive type of conversion. They have sloping walls and a flat roof, making them a versatile type of attic extension that can work for lots of properties. You can also ask an architect to design a mansard extension to match your home so it doesn’t look out of place.

Since you’ll need to change the roof a lot, a mansard loft conversion is the most expensive type and you’ll also need to apply for planning permission before any work can begin.

Mansard loft conversions take anywhere between 8 and 11 weeks to complete.

Bungalow loft conversions

It’s not uncommon for bungalow owners to decide to convert their lofts since there is so much space in the roof. You could create extra space for bedrooms, living areas and bathrooms - whatever your family needs!

Since bungalow lofts are larger, the average cost of a conversion is higher than for two-storey homes. They also take longer to finish - around 10 to 12 weeks.

Material costs for loft conversions

loft conversion windows

Since you’re creating a whole extra room for your house, there are a lot of material costs to think about. These include:

Note: due to Covid-19 lockdowns and Brexit shortages, material prices are currently higher than usual. You might find that you also have a longer wait for materials to arrive, so it’s worth factoring this into the time your loft conversion takes.

Loft conversion window costs

If you want to use your new attic conversion as a proper room, you’ll want plenty of light coming in through windows. Speak to your builder or architect about the amount of windows they recommend you should have. The cost of your windows will depend on the type you’ll need. If you’re having a dormer loft conversion, you’ll want specific dormer windows, but you may want roof lights for other types of loft extension.

Roof lights are often referred to as Velux windows, but this is just one brand. These windows fit into your roof and can be manually controlled or operated using a remote.

Window type Average cost per window
Dormer £150-£300
Roof light (Velux) £320-£550

Loft conversion flooring costs

Flooring is one of the most important costs to consider when it comes to furnishing your loft conversion. What kind of style do you want? Would you like real wood, laminate or carpet? These days, there are lots of options out there and they don’t have to break the bank.

Here’s a quick summary of the costs of different types of flooring:

Flooring type Average cost per m2
Vinyl £6-£14
Laminate £7-£25
Carpet £5-£30
Hardwood £35-£45

Costs of stairs for your loft conversion

You’ll need to consider the cost of your stairs if you want to access your loft conversion! Do you want to go for a traditional, understated look or a more modern aesthetic? Whatever you choose, there’s a cost involved and it’s one you don’t want to scrimp on for safety as well as style.

Stair material Average cost per staircase
Softwood £380-£800
Hardwood £1,400-£1,500
Metal £1,000-£3,000
Glass £2,500-£4,000

Costs of lighting for your loft conversion

The angle of the roof can make loft conversions quite dark, so you’ll want to consider lighting carefully. When you furnish your room, you might want to add table or floor lamps, but we’ll focus on the lighting you’d need an electrician to wire in for you.

You’ll need to decide whether you’re happy with standard ceiling lights, like spotlights and pendants, or whether you’d like to splash out and get smart lighting that you can control with your smartphone.

Lighting type Average cost per fitting
Hanging pendants £15
Spotlights £30-£60
Smart bulbs £15-£170

Loft conversion heating costs

You’ll need to ensure you can heat your loft conversion efficiently if you want to use it as an extra living space. These days, lots of people go for underfloor heating since you can power it using solar panels, but you’ll need to have this installed before your floor is laid. Many people opt to add radiators to their current gas central heating system.

Make sure you check that your current boiler will be able to cope with additional radiators - otherwise you may need to factor in the cost of a new boiler too.

Heating type Average cost
Standard horizontal/vertical radiators £50-£900 per radiator
Electric radiators £90-£400 per radiator
Wet underfloor heating £60-£80 per m2
Dry underfloor heating £30-£40 per m2

Loft conversion insulation costs

You’ll need to consider the cost of insulation for your loft extension as you want to make sure you don’t lose too much heat through the roof and walls. How much it sets you back will depend on the type of insulation you choose.

Insulation type Cost per m2
Loose fill £5-£15
Sheet £15-£25
Blanket £12-£27

Will I need planning permission for my loft conversion?

Most roof light and dormer loft conversions fall under permitted development rules and therefore you won’t need to apply for planning permission. However, if you’re opting for a hip to gable or mansard loft conversion, you will need to apply for planning permission as these types of extensions are considered as major roof alteration works.

Remember, even if you don’t need planning permission for your loft conversion, you’ll still need to get it inspected by your local building control. Submitting your plans and having inspections costs between £400 and £800.

Cost example for a loft conversion

A loft conversion is no small project and there are lots of different parts required to make the room habitable. Take a look at the below table to give you an idea of the supply costs for a 30m2 conversion:

Materials Cost (not including labour)
Velux windows/roof lights £1,200
Flooring £500
Stairs £1,320
Lighting £375
Radiators/heating £1,000
Insulation £320
Electrics £300
Structural beams and joists £2,500
Ensuite £4,500
Decorating materials £1,000
Basic plans £600
Building regulations £600
Party wall survey £200
Total £14,415

How long does a loft conversion take?

How long your loft conversion takes will depend on the type of extension you go for and how big it is. To give you a rough idea, we’ve put together the time it takes to complete each type of small, medium or large loft conversion.

Loft conversion type 20m2 30m2 40m2
Roof light 4-5 weeks 5-6 weeks 6-7 weeks
Dormer 6-7 weeks 7-8 weeks 8-9 weeks
Hip to gable 6-7 weeks 7-8 weeks 8-9 weeks
Mansard 8-9 weeks 9-10 weeks 10-11 weeks

Get competitive quotes

Make sure you get a range of quotes for your loft conversion so you can hear from a variety of builders to see what they would do with the space. Getting more than one quote protects you from being overcharged and also from being undercharged and being left with poor workmanship.

Post a job on HaMuch to get quotes from reputable builders in your area.


Estimates for common builder jobs;

Job Estimate
Cost to fit windows, doors and conservatories £160
Cost to build a side return extension £61000
Cost to repoint or repair brickwork £405
Cost to remove a chimney breast £800
New fitted kitchen cost £19500
Cost to lay a new driveway £3400
Cost to fit a new bathroom £8000
Cost of a loft conversion £49900
Cost to build a retaining wall £320
Basement conversion cost £43000

Rates for other trades

Loft conversion cost in the UK
Loft conversion cost in the UK (excluding VAT or callout charges)
Location in UKLoft conversion cost
Loft conversion near Aberdeen£32400
Loft conversion near Amber Valley£28260
Loft conversion near Angus£27450
Loft conversion near Arun£29340
Loft conversion near Ashfield£28800
Loft conversion near Aylesbury Vale£29160
Loft conversion near Barnsley£31230
Loft conversion near Basildon£29700
Loft conversion near Basingstoke & Deane£29880
Loft conversion near Bassetlaw£27810
Loft conversion near Bath & North East Somerset£29520
Loft conversion near Bedford£31590
Loft conversion near Belfast£21780
Loft conversion near Birmingham£27360
Loft conversion near Blackburn£27360
Loft conversion near Blackpool£25920
Loft conversion near Bolton£27090
Loft conversion near Bournemouth£29700
Loft conversion near Bracknell Forest£31500
Loft conversion near Bradford£27900
Loft conversion near Braintree£28980
Loft conversion near Breckland£25920
Loft conversion near Bridgend£26190
Loft conversion near Brighton£29160
Loft conversion near Bristol£29430
Loft conversion near Broadland£25290
Loft conversion near Broxtowe£28350
Loft conversion near Bury£27720
Loft conversion near Caerphilly£25920
Loft conversion near Calderdale£26550
Loft conversion near Cambridge£30510
Loft conversion near Canterbury£26910
Loft conversion near Cardiff£25830
Loft conversion near Carmarthenshire£25830
Loft conversion near Charnwood£26190
Loft conversion near Chelmsford£29430
Loft conversion near Cheltenham£29790
Loft conversion near Cherwell£29880
Loft conversion near Chester£26640
Loft conversion near Colchester£28620
Loft conversion near Conway£26190
Loft conversion near Coventry£26910
Loft conversion near Crewe & Nantwich£29340
Loft conversion near Dacorum£30780
Loft conversion near Derby£28350
Loft conversion near Doncaster£27720
Loft conversion near Dover£26910
Loft conversion near Dudley£27270
Loft conversion near Dumfries & Galloway£24300
Loft conversion near Dundee£28260
Loft conversion near East Ayrshire£26820
Loft conversion near East Devon£24480
Loft conversion near East Dunbartonshire£28890
Loft conversion near East Hampshire£29610
Loft conversion near East Hertfordshire£31410
Loft conversion near East Lindsey£27450
Loft conversion near East Riding£27810
Loft conversion near Eastleigh£29970
Loft conversion near Edinburgh£30780
Loft conversion near Elmbridge£31140
Loft conversion near Epping Forest£30600
Loft conversion near Erewash£28260
Loft conversion near Exeter£24480
Loft conversion near Falkirk£27810
Loft conversion near Fife£29430
Loft conversion near Flintshire£26910
Loft conversion near Gateshead£29430
Loft conversion near Gedling£28620
Loft conversion near Glasgow£31410
Loft conversion near Gloucester£28440
Loft conversion near Guildford£31950
Loft conversion near Gwynedd£23670
Loft conversion near Halton£26730
Loft conversion near Harrogate£27270
Loft conversion near Havant & Waterloo£29340
Loft conversion near Highland£27000
Loft conversion near Horsham£29430
Loft conversion near Huntingdonshire£29520
Loft conversion near Ipswich£27270
Loft conversion near Isle of Wight£29520
Loft conversion near Kings Lynn & West Norfolk£26100
Loft conversion near Kingston-upon-Hull£26640
Loft conversion near Kirklees£27900
Loft conversion near Knowsley£25830
Loft conversion near Lancaster£27360
Loft conversion near Leeds£27900
Loft conversion near Leicester£25560
Loft conversion near Lisburn£21870
Loft conversion near Liverpool£26190
Loft conversion near London£30780
Loft conversion near Luton£30240
Loft conversion near Macclesfield£27630
Loft conversion near Maidstone£30600
Loft conversion near Manchester£27450
Loft conversion near Mid Bedfordshire£31230
Loft conversion near Mid Sussex£29160
Loft conversion near Middlesbrough£28170
Loft conversion near Milton Keynes£30690
Loft conversion near Neath Port Talbot£26640
Loft conversion near New Forest£30150
Loft conversion near Newbury£29430
Loft conversion near Newcastle-under-Lyme£27090
Loft conversion near Newcastle-upon-Tyne£29700
Loft conversion near Newport£26730
Loft conversion near North Ayrshire£28350
Loft conversion near North East Lincolnshire£28170
Loft conversion near North Hertfordshire£31230
Loft conversion near North Lanarkshire£27990
Loft conversion near North Lincolnshire£26010
Loft conversion near North Somerset£29340
Loft conversion near North Tyneside£30510
Loft conversion near North Wiltshire£28440
Loft conversion near Northampton£29790
Loft conversion near Norwich£25560
Loft conversion near Nottingham£28620
Loft conversion near Nuneaton & Bedworth£27000
Loft conversion near Oldham£27630
Loft conversion near Oxford£30330
Loft conversion near Pembrokeshire£22500
Loft conversion near Perth & Kinross£28980
Loft conversion near Peterborough£28890
Loft conversion near Plymouth£28260
Loft conversion near Poole£29880
Loft conversion near Portsmouth£29160
Loft conversion near Powys£27000
Loft conversion near Preston£27450
Loft conversion near Reading£31410
Loft conversion near Redcar & Cleveland£28620
Loft conversion near Reigate & Banstead£31230
Loft conversion near Renfrewshire£32310
Loft conversion near Rhondda, Cynon, Taff£25470
Loft conversion near Rochdale£27540
Loft conversion near Rotherham£30870
Loft conversion near Salford£27180
Loft conversion near Salisbury£34470
Loft conversion near Sandwell£27180
Loft conversion near Scarborough£27000
Loft conversion near Scottish Borders£33300
Loft conversion near Sefton£26460
Loft conversion near Sevenoaks£30600
Loft conversion near Sheffield£31500
Loft conversion near Slough£31590
Loft conversion near Solihull£26910
Loft conversion near South Ayrshire£27270
Loft conversion near South Bedfordshire£31590
Loft conversion near South Cambridgeshire£30960
Loft conversion near South Gloucestershire£29250
Loft conversion near South Kesteven£26640
Loft conversion near South Lanarkshire£25830
Loft conversion near South Oxfordshire£30600
Loft conversion near South Somerset£32310
Loft conversion near South Tyneside£29970
Loft conversion near Southampton£29700
Loft conversion near Southend-on-Sea£28710
Loft conversion near St Albans£30960
Loft conversion near St Helens£25920
Loft conversion near Stafford£28440
Loft conversion near Stockport£27900
Loft conversion near Stockton-on-Tees£28440
Loft conversion near Stoke-on-Trent£27270
Loft conversion near Stratford-on-Avon£27360
Loft conversion near Stroud£28260
Loft conversion near Suffolk Coastal£25830
Loft conversion near Sunderland£29340
Loft conversion near Swale£28530
Loft conversion near Swansea£27990
Loft conversion near Tameside£27900
Loft conversion near Teignbridge£26640
Loft conversion near Tendring£27900
Loft conversion near Test Valley£28440
Loft conversion near Thamesdown£28350
Loft conversion near Thanet£25020
Loft conversion near The Wrekin£29790
Loft conversion near Thurrock£29970
Loft conversion near Torbay£28350
Loft conversion near Trafford£27810
Loft conversion near Vale of Glamorgan£26010
Loft conversion near Vale of White Horse£29700
Loft conversion near Vale Royal£27180
Loft conversion near Wakefield£27900
Loft conversion near Walsall£27360
Loft conversion near Warrington£27450
Loft conversion near Warwick£27270
Loft conversion near Waveney£27900
Loft conversion near Waverley£31860
Loft conversion near Wealden£28890
Loft conversion near West Lancashire£26190
Loft conversion near West Lothian£30060
Loft conversion near West Wiltshire£28440
Loft conversion near Wigan£26550
Loft conversion near Windsor & Maidenhead£31680
Loft conversion near Wirral£26370
Loft conversion near Wokingham£31410
Loft conversion near Wolverhampton£27360
Loft conversion near Wrexham Maelor£27810
Loft conversion near Wychavon£27450
Loft conversion near Wycombe£31050
Loft conversion near York£26820