Single Storey Extension Cost UK (2026)
UK national average£1,800 – £3,200per m² · typical duration 10–16 weeks
Single Storey Extension in the UK typically costs £1,800–£3,200per m² in 2026. London and the Home Counties sit at the top of the range; Wales, Northern Ireland and the North East are usually cheapest. Click any city below for a full local breakdown.
What's usually included
- Foundations and drainage
- Brick and block shell
- Roof and glazing
- First and second fix
- Plaster and decoration
What affects the price
- Ground conditions and foundation depth
- Glazing ratio (bi-folds, roof lights)
- Kitchen refit included
- Structural steels and knock-through
- Planning permission vs PD
Single Storey Extension prices by UK location
London
London£2,430 – £4,320Barnet£2,195 – £3,905Croydon£2,070 – £3,680Ealing£2,195 – £3,905Bromley£2,125 – £3,775Enfield£2,070 – £3,680Brent£2,195 – £3,905Wandsworth£2,340 – £4,160Tower Hamlets£2,305 – £4,095Southwark£2,340 – £4,160Lambeth£2,305 – £4,095Lewisham£2,160 – £3,840Hillingdon£2,125 – £3,775Redbridge£2,070 – £3,680Hounslow£2,125 – £3,775Greenwich£2,195 – £3,905Hackney£2,305 – £4,095Waltham Forest£2,125 – £3,775Camden£2,430 – £4,320Haringey£2,195 – £3,905Westminster£2,520 – £4,480Harrow£2,160 – £3,840Bexley£2,070 – £3,680Islington£2,375 – £4,225Merton£2,195 – £3,905Sutton£2,070 – £3,680Richmond upon Thames£2,305 – £4,095Hammersmith£2,375 – £4,225Kingston upon Thames£2,195 – £3,905Ilford£2,125 – £3,775Kensington£2,520 – £4,480Romford£2,070 – £3,680Wembley£2,195 – £3,905Fulham£2,430 – £4,320Orpington£2,070 – £3,680Uxbridge£2,125 – £3,775Twickenham£2,250 – £4,000Chelsea£2,555 – £4,545Stratford£2,250 – £4,000
South East
Brighton£2,160 – £3,840Southampton£1,945 – £3,455Portsmouth£1,890 – £3,360Reading£2,070 – £3,680Slough£2,070 – £3,680Oxford£2,250 – £4,000Isle of Wight£1,890 – £3,360High Wycombe£2,070 – £3,680Maidstone£1,945 – £3,455Crawley£2,015 – £3,585Worthing£1,890 – £3,360Basingstoke£1,980 – £3,520Gillingham£1,835 – £3,265Woking£2,160 – £3,840Eastbourne£1,835 – £3,265Hastings£1,710 – £3,040Hove£2,160 – £3,840Dartford£2,070 – £3,680Bracknell£2,070 – £3,680Gosport£1,765 – £3,135Chatham£1,800 – £3,200Guildford£2,195 – £3,905Ashford£1,890 – £3,360Aylesbury£1,980 – £3,520Maidenhead£2,160 – £3,840Redhill£2,125 – £3,775Farnborough£2,070 – £3,680Bognor Regis£1,765 – £3,135Sittingbourne£1,800 – £3,200Margate£1,655 – £2,945Tunbridge Wells£2,125 – £3,775Canterbury£1,890 – £3,360Banbury£1,890 – £3,360Eastleigh£1,890 – £3,360Horsham£2,070 – £3,680Andover£1,890 – £3,360Folkestone£1,765 – £3,135Wokingham£2,160 – £3,840Havant£1,835 – £3,265Winchester£2,160 – £3,840Newbury£2,070 – £3,680Fareham£1,890 – £3,360Ramsgate£1,620 – £2,880Camberley£2,015 – £3,585Aldershot£1,980 – £3,520Windsor£2,195 – £3,905Epsom£2,195 – £3,905Burgess Hill£1,980 – £3,520Dover£1,765 – £3,135Haywards Heath£2,070 – £3,680Sevenoaks£2,250 – £4,000Chichester£2,070 – £3,680
East of England
Milton Keynes£1,980 – £3,520Luton£2,070 – £3,680Peterborough£1,710 – £3,040Colchester£1,835 – £3,265Basildon£1,945 – £3,455Southend-on-Sea£1,890 – £3,360Cambridge£2,160 – £3,840Ipswich£1,710 – £3,040Norwich£1,710 – £3,040Chelmsford£2,015 – £3,585Bedford£1,890 – £3,360Watford£2,125 – £3,775Hemel Hempstead£2,070 – £3,680Harlow£1,980 – £3,520Stevenage£1,980 – £3,520St Albans£2,195 – £3,905Lowestoft£1,585 – £2,815Great Yarmouth£1,530 – £2,720Cheshunt£2,125 – £3,775Welwyn Garden City£2,070 – £3,680Braintree£1,890 – £3,360King's Lynn£1,585 – £2,815Bury St Edmunds£1,835 – £3,265Hatfield£2,015 – £3,585
South West
Bristol£2,070 – £3,680Plymouth£1,710 – £3,040Bournemouth£1,890 – £3,360Swindon£1,800 – £3,200Poole£1,890 – £3,360Exeter£1,890 – £3,360Gloucester£1,765 – £3,135Cheltenham£1,980 – £3,520Bath£2,160 – £3,840Weston-super-Mare£1,710 – £3,040Taunton£1,765 – £3,135Torquay£1,710 – £3,040Weymouth£1,710 – £3,040Paignton£1,655 – £2,945Yeovil£1,710 – £3,040Salisbury£1,890 – £3,360Barnstaple£1,655 – £2,945Penzance£1,655 – £2,945Dorchester£1,800 – £3,200St Austell£1,620 – £2,880Truro£1,765 – £3,135
West Midlands
Birmingham£1,800 – £3,200Coventry£1,765 – £3,135Sandwell£1,710 – £3,040Dudley£1,710 – £3,040Walsall£1,710 – £3,040Wolverhampton£1,710 – £3,040Stoke-on-Trent£1,585 – £2,815Solihull£1,890 – £3,360Telford£1,655 – £2,945Worcester£1,765 – £3,135Redditch£1,710 – £3,040Nuneaton£1,710 – £3,040Shrewsbury£1,710 – £3,040Stafford£1,655 – £2,945Hereford£1,710 – £3,040Kidderminster£1,655 – £2,945Leamington Spa£1,945 – £3,455Warwick£1,890 – £3,360Stratford-upon-Avon£1,945 – £3,455
East Midlands
Yorkshire
Leeds£1,800 – £3,200Sheffield£1,710 – £3,040Bradford£1,620 – £2,880Wakefield£1,655 – £2,945Doncaster£1,530 – £2,720Hull£1,475 – £2,625Rotherham£1,585 – £2,815Barnsley£1,530 – £2,720Huddersfield£1,655 – £2,945York£1,890 – £3,360Halifax£1,620 – £2,880Grimsby£1,475 – £2,625Scunthorpe£1,475 – £2,625Harrogate£1,980 – £3,520Scarborough£1,585 – £2,815
North West
Manchester£1,890 – £3,360Liverpool£1,710 – £3,040Wigan£1,585 – £2,815Wirral£1,655 – £2,945Stockport£1,800 – £3,200Bolton£1,620 – £2,880Sefton£1,655 – £2,945Salford£1,800 – £3,200Oldham£1,620 – £2,880Trafford£1,890 – £3,360Tameside£1,620 – £2,880Rochdale£1,585 – £2,815Warrington£1,765 – £3,135Bury£1,655 – £2,945St Helens£1,585 – £2,815Knowsley£1,585 – £2,815Preston£1,655 – £2,945Birkenhead£1,620 – £2,880Blackpool£1,530 – £2,720Blackburn£1,530 – £2,720Southport£1,710 – £3,040Chester£1,890 – £3,360Burnley£1,475 – £2,625Carlisle£1,585 – £2,815Crewe£1,655 – £2,945Widnes£1,585 – £2,815Runcorn£1,585 – £2,815Barrow-in-Furness£1,530 – £2,720Ellesmere Port£1,620 – £2,880Lancaster£1,655 – £2,945Macclesfield£1,890 – £3,360Chorley£1,620 – £2,880Leyland£1,585 – £2,815Kendal£1,710 – £3,040Fleetwood£1,475 – £2,625
North East
Wales
Scotland
Glasgow£1,620 – £2,880Edinburgh£1,980 – £3,520Aberdeen£1,710 – £3,040Dundee£1,585 – £2,815Paisley£1,530 – £2,720East Kilbride£1,585 – £2,815Inverness£1,655 – £2,945Livingston£1,710 – £3,040Dunfermline£1,585 – £2,815Hamilton£1,530 – £2,720Kirkcaldy£1,530 – £2,720Perth£1,655 – £2,945Ayr£1,530 – £2,720Stirling£1,710 – £3,040Falkirk£1,585 – £2,815