Leeds kept building back-to-backs until 1937
Parliament banned back-to-back houses in 1909. Leeds carried on under a loophole for houses that already had permission, and the last ones weren't finished until 1937. A report for the council in 2008 put the number still standing at about 19,500. Harehills has the most, over 4,000. Beeston Hill, Armley and Morley come next.
Plenty already have a room in the roof. Most of the Victorian and Edwardian ones came with a stair up to an attic, so the job is often improving a room rather than creating one. The later ones have only a roof void and need a new stair.
The awkward part is the window. A back-to-back has no back windows, so a dormer can only go on the slope facing the street. That slope is the front of the house as far as planning law is concerned, and permitted development doesn't cover a dormer there. Assume you'll need an application.
Further out the stock changes. A council survey in 2017 found a third of the city's homes were semis, and Valuation Office figures show about a fifth were built between the wars. Those houses are where most hip to gable work happens.
Choosing the right conversion for a Leeds roof
How each type suits the houses here. Every one has a full guide.
Rooflights only. For a back-to-back that already has an attic room, this is usually where to start. Rooflights that sit within 15cm of the slope stay permitted development, even in a conservation area, and they leave the street view alone.
Rear dormer. The usual answer for a through terrace or a 1930s semi. The council's design guide accepts a rear dormer a little larger than a front one, if it is set down from the ridge and in from the sides.
L-shaped dormer. Only works where there's a back extension to build over, so it suits through terraces rather than back-to-backs. Check the volume early, because a terrace house is allowed 40 cubic metres before it needs permission.
Hip to gable. The obvious move on an interwar semi with a sloping end roof. Leeds planners say side changes can unbalance a semi-detached pair, so if yours needs an application, expect questions about the house next door.
Read our full guide: Hip-to-Gable Loft Conversions: What It Involves and Which Houses It Suits →
Extra bedroom. Most people convert for this. In a back-to-back, putting a dormer in to make a proper extra storey brings fire escape rules into play, so the stair and doors below may need work too.
En-suite. Decide before the drawings. In a narrow terrace the soil pipe route settles where the shower goes.
Home office. A sensible use for a small back-to-back attic that won't take a full bedroom. You need less headroom for a desk than a bed.
Read our full guide: Loft Home-Office Conversion: What Works Well Up There and What to Specify →
Mansard. Nearly always a planning application. The design guide wants roof additions kept subordinate, so a full mansard on a terrace is a hard sell. Talk to an architect first.
Planning. A rear dormer on a suburban semi or a through terrace can usually go ahead as permitted development. It stops on back-to-backs, and in a conservation area or on a listed building.
Cost. We won't print a Leeds price. A Harehills attic and a Roundhay villa are different jobs, and three site visits will tell you more than any figure here.
Stone slate in the old villages, Welsh slate on the terraces
Leeds has 80 conservation areas on the council's current map, and they reach well into ordinary housing. Headingley, Chapeltown, Roundhay, Armley, Holbeck and Morley all have one, as do Otley, Wetherby and dozens of villages. Inside any of them, a dormer or hip to gable needs planning permission on the back slope as well as the front.
The roofs vary more than people expect. The Far Headingley appraisal describes heavy stone slate on the old village cottages and ordinary slate on the villas and terraces. It also notes small gabled dormers set well below the ridge as a long-standing feature of the terraces there. That's useful. A new dormer that copies them has a better chance than a flat box. In Chapeltown the late Victorian houses already have attic windows in street-facing gables, built in red brick and sandstone under Welsh slate.
Leeds wants dormers clad to match the roof. Timber or plastic cladding on the cheeks is generally refused, and two small dormers are preferred to one big one. I'd follow that anywhere in Leeds.
The council, the shared-house rule and sign-off
Planning applications go to Leeds City Council and can be searched on its Public Access register. Look up your own street before paying for drawings. If three neighbours have dormers, you'll see exactly what was approved.
An Article 4 direction covers large parts of the city, Headingley, Hyde Park, Woodhouse and parts of Roundhay among them. It removes the right to turn a family house into a small shared house without permission. It doesn't touch your roof.
Building control is the council's own team at Merrion House (building.control@leeds.gov.uk). Its fee tables price loft conversions by whether there's a dormer and how many rooms you add. You'll get a completion certificate at the end, and a buyer's solicitor will want to see it.
Where these facts come from
- Leeds City Council: Householder Design Guide SPD (2012)
- Leeds City Council: conservation area map
- Far Headingley Conservation Area Appraisal (2008)
- Chapeltown Conservation Area Appraisal extension (2007)
- Addressing the Challenge of the Back-to-Backs in Leeds, Vol. 2 (2008)
- Leeds Strategic Housing Market Assessment 2017
- Leeds City Council: HMO Article 4 direction
- Leeds City Council: building regulations approval
- GOV.UK: permitted development technical guidance
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Questions people in Leeds ask
My back-to-back in Harehills already has an attic bedroom. Do I need building control to improve it?
Redecorating doesn't. Structural work, a new stair or a dormer does. A dormer that turns the attic into a full extra storey also means fire escape changes below, so get that priced in before you commit.
Everyone on my street has a front dormer. Can I have one too?
Possibly. Leeds normally refuses front dormers, but it makes an exception where they already dominate the street. It will still want yours small and in keeping with the roof, and it will need a planning application.
I live in Headingley. Does the Article 4 direction stop me converting my loft?
No. It only controls turning a house into a small HMO. A loft room for your own family is unaffected. Letting the house to a group of sharers afterwards is a different matter and may need permission.
My cottage in an old village core has a stone slate roof. Can I put rooflights in?
Usually, if they sit no more than 15cm proud of the slope and the house isn't listed. A dormer would need planning permission in a conservation area, and the council will expect the stone slate to be reused or matched.