Flat Conversions Wood Green

Flat conversions in Wood Green start from a stock where 62% of homes are already flats and 38% are houses, most of them terraces. Haringey Policy DM16 only permits subdividing a house into self-contained flats where its gross original internal floor space is greater than 120m2, so the size of the original house is the first test. The second is whether each flat can meet the space standards, and the third is the fire and sound separation that building control will check and test.

In Wood Green, converting a house into two or three flats is published at £50,000 to £120,000 including professional and council fees, and an England-wide guide puts a straightforward two-flat split at £40,000 to £80,000 in construction alone, which is the part a builder prices (indicative London ranges, Architectural Drawings and Mayfair Studio, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Wood Green: we build the conversion to the approved drawings, building control inspects the fire and sound separation, and a registered electrician certifies each flat's electrics.

Which Wood Green houses are big enough to split

Splitting a house into flats is a material change of use, so it always needs planning permission. In Wood Green, Policy DM16 only permits it if its gross original internal floor space is greater than 120m2, measured on the house as first built. Rear extensions and loft rooms added later do not count towards it. That can rule out a smaller Edwardian terrace before any drawing is done, so a measured survey is the sensible first spend.

Inside Haringey's Family Housing Protection Zones a conversion must also cause no net loss of family-sized units of 3 bedrooms or more, which in practice means keeping a larger flat, often at ground floor with the garden. Haringey also says all residential conversions should be supported by a car parking survey using the Lambeth parking survey methodology. We price from the scheme your designer settles once those tests are met, not from an early sketch.

Housing in Wood Green

Around 9,700 homes make up Wood Green on the valuation list; 62% are flats and 38% houses, and 67% date from before 1919, 4% from between the wars and 29% from after 1945. Since most homes here are flats, a flat in Wood Green can be split or combined only with the freeholder's consent, and changing the number of homes usually needs planning permission as well.

Room sizes and stacking in a Wood Green conversion

Each new flat has to meet the national space standard, because Haringey requires house-to-flat conversions to meet the nationally described space standards and the Mayor of London's Housing SPG. Under London Plan Policy D6 a single bedroom must be at least 2.15m wide with a floor area of at least 7.5 sq.m. A double must reach 11.5 sq.m. On a narrow Wood Green terrace those two figures often decide where the partitions can go, and whether the back addition can hold a bedroom at all.

Haringey also expects conversions to stack rooms vertically to limit noise between homes, with bedrooms over bedrooms and living areas over living areas. On a two-storey terrace that usually puts the kitchen and living space of each flat in the same part of the plan, which suits the drainage too, because the soil stacks line up. D6 also sets a minimum floor to ceiling height of 2.5m for at least 75 per cent of the gross internal area of each dwelling, which can rule a low loft out as living space.

Fire and sound separation between the new flats

Separating the flats is the part of the build that building control looks at hardest, under Part B for fire and Part E for sound. The old timber floor between ground and first floor has to become a fire-resisting, sound-insulated separating floor, and the staircase becomes a protected escape route with fire doors onto it. In an Edwardian Wood Green house that means lifting boards, adding insulation and resilient bars, and fitting a new ceiling below. Chimney breasts and old openings in the party walls are checked too, since fire and sound both find the gaps.

For flats formed by a material change of use, Approved Document E sets 43 dB airborne sound insulation for walls, floors and stairs, and a maximum of 64 dB impact sound for floors and stairs. Those figures are tested on site before completion, so we build the separating floors carefully around the joist ends, the stair and the service runs, which are where sound gets through. Each flat also gets its own smoke detection and a fire door onto the shared stair.

Services, drains and addresses for each Wood Green flat

Every flat in a Wood Green conversion needs its own services and its own address. That means separate electricity meters and consumer units, a separate gas supply or electric heating, and water arranged so each flat can be isolated. The utility companies need the new addresses before they will fit meters, and street naming and numbering is dealt with by the council, so the owner starts that process early to avoid a finished flat with no supply.

New bathrooms and kitchens often mean new drainage connections at the rear of the terrace. Haringey building control says that where development is within 3 metres of a public sewer, build over permission from Thames Water is needed before work starts, which can apply where a sewer runs behind a terrace. If a party wall is cut into for new steel or fire separation, the building owner serves the party wall notices, two months ahead for a party structure notice, and that work starts on written consent or a surveyor's award.

• House to flat conversions into two or more self-contained units
• Separate gas, electricity and water supplies for each flat
• Decoration, flooring and making good throughout, ready to let or sell

VOA Council Tax stock of properties, March 2025, for Wood Green North, Wood Green South and Noel Park. Counts rounded by the VOA.

For the wider picture around flat conversions in Wood Green, see structural alterations in Wood Green, flat conversions across Haringey, a building contractor for the whole conversion, party walls in a flat conversion, how we handle flat conversions across London and Central Heating Installation Cost.

Why Wood Green Homeowners Choose GS Renovation

A conversion is several small buildings inside one shell, so the order of work decides the quality. We build to the approved drawings, set out the separating floors and protected stair first, run the services for each flat separately, and book the sound tests and building control inspections before the finishes go on. You get a written programme for the whole job and one contact who follows it through to completion.

• Mains-wired, interlinked smoke and heat alarms to the approved fire strategy
• Itemised pricing, so you can see what every stage costs
• Each flat numbered and supplied before the keys are handed over

Reviewed jobs near Wood Green

1 MyBuilder review from Wood Green, with each customer's own job title:

• New kitchen install moving plumbing, elecs, flooring, Wood Green, 19 Jan 2022 (5 out of 5)

Read all 31 on our reviews page.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.