Terraces built in a hurry, 1894 to 1910
Much of Ilford went up in about fifteen years. The district had under 11,000 people in 1891 and more than 78,000 by 1911. The man behind much of it was A. Cameron Corbett, who started the Grange estate north of the station in 1894 and the Downshall and Mayfield estates at Seven Kings and Goodmayes in 1898. Peter Griggs, a local contractor, built Cranbrook from 1897.
What they built were long, parallel by-law streets of two-storey terraces on narrow plots, with few detached houses among them. After the First World War building moved outward to Gants Hill, Newbury Park and Barkingside, and those streets are largely interwar semis and short terraces, not Edwardian as you will sometimes read. At the 2011 census terraces were about a third of all homes in Redbridge, semis about a quarter.
So the typical Ilford loft sits over a narrow terrace between two party walls. That is good news. Those roofs were built by hand, and a rear dormer on one is about as familiar a job as east London has.
What Redbridge wants from a dormer
Redbridge's Housing Design guide, adopted in 2019, is blunt about roofs. If your conversion needs a planning application, the dormer has to look subordinate to the roof. In numbers, at least 0.5m below the ridge, 1m above the eaves and 1m in from the party wall. Front and side dormers are generally refused unless the street already has them. Where a terrace has parapet walls between the roofs, the parapets should not be built up. Oversized dormers, it says, will be refused.
Hip to gable is where people get caught out. The guide says it will generally be refused where it would spoil the symmetry of a pair of semis. A 2014 character study singled out hip to gables and box dormers in the interwar streets towards Chadwell Heath. If your semi still has permitted development rights the guide doesn't govern the work, but get a lawful development certificate before the scaffold goes up.
Fitting the conversion to an Ilford house
How each type suits the housing here, with a full guide for each.
Rear dormer. The default for a Corbett terrace in Seven Kings, Goodmayes or the Grange estate. Outside a conservation area it is normally permitted development.
Hip to gable. Suits the interwar semis of Gants Hill and Newbury Park on paper. Redbridge's guide is against it where it unbalances a pair, so check your rights before you pay for drawings.
Read our full guide: Hip-to-Gable Loft Conversions: What It Involves and Which Houses It Suits →
Rooflights only. Redbridge is relaxed about rooflights, even on the front, as long as they line up with the first-floor windows. On the Bungalow Estate the rule flips, and street-facing skylights are not supported.
Extra bedroom. What most Ilford families are after. On a narrow terrace the new staircase usually lands over the existing one, so ask how the landing will work before you look at anything else.
L-shaped dormer. Only an option if your house has a two-storey back addition to build over. Fill both roofs to the edges and the council will call it oversized.
En-suite. Space is tight on a narrow frontage, so the shower room usually goes at the back under the dormer, close to the soil pipe. Decide that before the drawings, not after.
Home office. The Elizabeth line has run through Ilford since 2022, which suits anyone splitting the week between home and the City.
Read our full guide: Loft Home-Office Conversion: What Works Well Up There and What to Specify →
Mansard. Always a planning application. Judged against Redbridge's rule that roof work must stay subordinate, a full mansard on an Ilford terrace is a hard sell.
Planning. Three of Redbridge's 16 conservation areas sit close to Ilford, and in any of them a dormer or hip to gable needs permission on the back slope as well as the front. The borough-wide Article 4 direction covers HMOs, not lofts.
Cost. We won't print an Ilford price. The old version of this page did, and a figure that isn't based on your roof is no use to you. Three site visits will be.
The Bungalow Estate plays by its own rules
Between Water Lane and Goodmayes Lane, south of Green Lane, is a conservation area of 1920s and 1930s bungalows built on old Goodmayes Farm land. Parkway, Meadway, Tresco Gardens and Budock Drive are all part of it. The council's own appraisal blames loft conversions of the 1980s and 1990s for much of the damage to it, and an Article 4 direction has controlled roof alterations there since 1987.
You can still convert, but to a set design. The 2018 guide allows one centred dormer on the front, about 1m wide, and up to two small ones at the back. No side dormers. The roof has to stay in plain clay tile, and chimney stacks stay too. These are low roofs, with 8ft eaves on the bungalows that face the road side on, so have the height measured before anything else.
Checking your street and booking inspections
Valentines Mansion has a small conservation area of its own, and Little Heath, out near King George Hospital, is another. Near either, look your address up before you assume permitted development. The planning register shows what the neighbours got through.
Building control is run by Redbridge Council, a member of LABC, unless your builder uses a private approved inspector. The council aims to visit on the same day if you book early. Keep the completion certificate with your deeds.
Where these facts come from
- Redbridge Council: protected buildings and conservation areas
- Redbridge Housing Design SPD (2019)
- Bungalow Estate design guide (2018)
- Bungalow Estate conservation area appraisal
- Redbridge borough-wide HMO Article 4 direction
- Redbridge Characterisation Study 2014, part 1
- Victoria County History, Essex vol. 5: Ilford
- Redbridge Local Flood Risk Management Strategy 2024
- Redbridge building control customer charter
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Questions people in Ilford ask
Can I let the loft rooms to sharers?
Possibly not without permission. Since 6 December 2019 an Article 4 direction across the whole of Redbridge has meant that turning a family house into a small shared house (an HMO) needs planning permission. The council also limits HMOs to about one in five houses on a road.
Could I turn the top floor into a separate flat?
Only with planning permission, and Redbridge supports house-to-flat conversions only in its town and local centres. The house also has to be over 130 square metres.
I'm on the Bungalow Estate. Is a loft conversion even allowed?
Yes, with planning permission and within the council's design guide. Heritage-style rooflights are fine on the rear, not the front. Big box dormers are what the guide was written to stop.
Would digging a basement be easier than going up?
In Ilford, usually not. Redbridge wants a basement impact assessment with every application and won't allow a basement home in flood zone 3. Ilford, Cranbrook and Seven Kings Water are all on the council's list of critical drainage areas, and more than 100 properties flooded in the July 2021 storms. The loft is the drier option.