Dining table set beside glazing that opens onto the terrace.

House extensions in Highgate.

North London · N2 · North London house, reconfigured and fitted outCompleted work, photograph

Highgate houses are larger, on a hill split between two boroughs. We start every extension by finding which one applies.

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One hill, two boroughs.

Two boroughs
Haringey and Camden share Highgate
2017
One neighbourhood plan, adopted by both
£200k to £320k
A wraparound extension, cost guide total

NU Projects is a design and build company in Fulham SW6, founded in 2010. We handle house and kitchen extensions in Highgate N6, under one contract. A rear kitchen extension typically runs £160k to £250k. A side return extension typically runs £140k to £220k. Call 020 7731 6841, and a budget estimate typically follows within seven days.

The boundary between Haringey and Camden cuts through Highgate. Which council decides depends on your side.

Each borough has its own Highgate Conservation Area. Haringey’s was designated in December 1967.

A single neighbourhood plan, adopted by both councils in 2017, sits over the top.

Houses here are larger, detached or semi-detached, with long gardens. A garden level kitchen or orangery style room usually fits.

The ground falls away, so rear walls are often seen from afar. We choose brick, glass and roof edges with that view in mind.

What the council allows in Highgate.

Council
Haringey or Camden, by address. The Highgate Neighbourhood Plan applies on both sides.
Conservation areas
One in each borough, plus the Holly Lodge Estate beside them.
Permitted development
Single storey rear extensions may reach 4 metres detached, 3 metres otherwise.
Larger extensions
The prior approval route to 8 metres does not apply in a conservation area.
Light wells
In Haringey, a front light well takes at most half the front garden.

Source: Haringey’s Development Management DPD 2017, Policy DM18, and the Highgate Neighbourhood Plan. Read on 25 October 2026. Policies change, so we read them again for your address.

Our nearest North London house.

Bathroom with a freestanding bath against book matched marble.

North London·House

North London house, reconfigured and fitted out

A house we reconfigured in North London N2, a short way from Highgate.

See the project

Completed work, photographs

What a house extension costs in Highgate.

£200k to £320kA wraparound extension. A project total, from our 2026 cost guide.

£160k to £250kA rear kitchen extension. A project total, from our 2026 cost guide.

A wide semi often suits a wraparound.

Fees, party wall costs, contingency and VAT sit outside both.

Open the calculatorThe 2026 cost guideCan I build it here?

Is my Highgate house in Haringey or Camden?

It depends on which side of the borough line it sits.

Both councils have their own Highgate Conservation Area.

We confirm it from the address before design starts.

Can I use permitted development for a Highgate extension?

Outside a conservation area, a detached house may extend 4 metres.

Inside one, the larger prior approval route is not available.

So the conservation status decides.

Does the Highgate Neighbourhood Plan apply to rear extensions?

The plan applies on both sides of the borough line.

Both councils adopted it in 2017.

We design to it alongside each borough’s own policies.

Can a Highgate extension include a lower ground room with a light well?

Often, on a sloping plot where the garden sits below the street.

In Haringey, a front light well may take only half the front garden.

Tell us about your home in Highgate.

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What is the work?

We call you back within the hour, in working hours. Your details go to the studio and our email system. Read the privacy note.