Loft conversion plans for Islington, £589
In Islington the roof rules depend on your street. In Highbury Fields some houses may have a traditional roof extension, some may have none at all, and chimneys must stay. We read your schedule.
- £439 drawings + £150 survey (£589 total)
- Area roof schedule read
- Mansard profile drawn
What do loft drawings cost in Islington?
The total is £589: £439 for drawings and submission and £150 for the survey, with no VAT to add. Islington Council’s fee is paid to the council.
In the Islington loft fee
- A roof survey with the original profile, chimneys and party walls
- Existing and proposed roof plan, elevations, floor plans and sections
- The conservation area roof policy for your street, read against the design
- Submission to Islington and replies to the case officer
Roof policies by schedule: Highbury Fields
Highbury Fields’ guidelines say the council may permit traditional roof extensions or dormers on properties in one schedule, existing mansards must stay unaltered on another, new or altered dormers are not permitted on front or side slopes of a third, and no roof extensions or dormers are permitted on a fourth. Where traditional mansards are permitted, the rear should be mansarded rather than vertical brickwork, to keep the original butterfly or other profile (Highbury Fields guidelines).
Consent will not be given to remove chimney stacks or pots visible from the street. For example, a house on a scheduled terrace may be allowed a mansard, while its neighbour on another schedule is not, even though the buildings look alike.
Article 4 across Islington
Islington says it has removed permitted development in 40 of its 42 conservation areas, so a loft there cannot be assumed to be permitted (Islington permitted development). Class B can apply on a house outside them, within its volume limits.
Islington decided 142 of 146 householder applications inside 8 weeks in the year to June 2026. Other areas have different guidance documents, and we read the one for your street before we draw, so the pack passes validation without a query.
Islington lofts in numbers
- 40 of 42
- Islington conservation areas where permitted development has been removed by an Article 4 direction. Islington: when you do or don’t need planning permission
- 4 schedules
- Roof policy schedules in the Highbury Fields guidelines, from permitted traditional extensions to none. Islington: Highbury Fields (CA05) conservation area design guidelines, January 2002
- Rear mansard
- Where mansards are permitted in Highbury Fields, the rear should be mansarded to keep the original profile. Islington: Highbury Fields (CA05) conservation area design guidelines, January 2002
- 40 m³ / 50 m³
- Permitted roof volume increase: 40 m³ for a terraced house, 50 m³ for other houses. GPDO 2015, Schedule 2, Part 1, Class B: additions to the roof (legislation.gov.uk)
- 142 of 146
- Islington Council householder applications decided within 8 weeks in the year to June 2026, out of all it decided (prior approvals not counted). MHCLG live table PS2, planning application statistics by district, July 2025 to June 2026 (GOV.UK)
- £96.97 per m²
- The Mayor of London’s CIL in Islington (band 1) for permissions granted in 2026, owed only when a scheme is liable for CIL in the first place. Mayoral CIL: annual rate summary for 2026, Table 1 (Greater London Authority)
Islington loft questions
Can I add a mansard in Islington?
It depends on the conservation area and, in Highbury Fields, on your property’s schedule.
Can I remove a chimney?
Not if it is visible from the street or public spaces, say Highbury Fields’ guidelines.
Is permitted development available?
Not in the 40 of 42 conservation areas with an Article 4 direction. Check the map.
How fast does Islington decide?
It decided 142 of 146 householder cases within 8 weeks last year. We cannot promise a date.
Other services people book with this one
Price your Islington loft
Send the address and a roof photo. We read the area policy and quote a fixed price.