Loft
conversions
in Primrose Hill, NW1

Planning permission is required for any extension or alteration at roof level in the Primrose Hill Conservation Area.

We photograph the roof from the street, the gardens and any higher ground before proposing a design, because what can be seen decides what Camden will accept.

Source: Camden: Primrose Hill Conservation Area Statement (adopted December 2000, published January 2001)

Where the roof is pitched and visible, changes that fundamentally alter its form are unlikely to be accepted; further rear dormers or rooflights are normally allowed if well designed, but not front or side dormers in an unimpaired group.

Roof extensions are unlikely to be acceptable where the house belongs to a largely unimpaired terrace or a symmetrical composition.

Camden's guidance asks dormers in conservation areas to keep a greater area of roof slope than elsewhere, in materials such as timber, lead and hanging tiles.

Sources: Camden: Primrose Hill Conservation Area Statement (adopted December 2000, published January 2001), Camden Planning Guidance: Home Improvements (January 2021)

In a conservation area Camden expects rooflights to be flush with the roof slope.

Where a steep front slope is seen in long views along the street, rooflights should go on the rear slopes.

We size rooflights for the room below and line them up with the windows of the floor beneath.

Source: Camden Planning Guidance: Home Improvements (January 2021)

The rear slopes of a Primrose Hill terrace can be seen from neighbouring gardens and from higher ground nearby. We keep rooflights low and flush, set them in line with the windows below, and choose dark frames that read like the slate around them.

Inside, a rooflight over the stair or a bathroom often does more for the new floor than a larger opening over a bedroom, where blinds will stay half closed.

Camden's guidance links mansards to Georgian and Victorian buildings whose front parapets or valley roofs let a new storey sit behind them.

Where a whole terrace or group is identified as significant for its roofline, a new roof level is unlikely to be accepted whatever its design.

Its 2021 guidance is more flexible than before, giving weight to older roof extensions and those built under permitted development nearby.

Source: Camden Planning Guidance: Home Improvements (January 2021)

Insulating a roof from inside, without changing its outside dimensions, does not need planning permission.

When a roof is re-covered, Camden asks for original ridge tiles and decorative chimney stacks and pots to be reused and, where possible, put back.

A loft conversion is the time to repair slates, flashings and gutters, while the scaffold is up.

On a terrace, the scaffold for roof work usually stands at the front and needs a licence, so we agree its position and the protection of the stucco below before it goes up, and take it down as soon as the roof is weathertight.

Source: Camden Planning Guidance: Home Improvements (January 2021)