A few yes/no checks
These determine whether your property sits inside permitted-development territory. If any answer puts you outside our launch coverage, we'll let you know — no fee.
Is the property in England?
Is the property a house (not a flat or maisonette)?
Is the property listed?
Is the property in a conservation area, National Park, AONB, World Heritage Site, or the Broads?
Is the property in an Article 4 Direction area that removes permitted development rights for your type of project?
Was your house created under an office-to-residential or shop-to-residential prior-approval (Class M, N, P or Q)?
Rear / side extension details
All measurements in metres. Where a cap applies, we'll flag immediately if your project sits outside it.
Is the dwelling…
Select…
Detached
Semi-detached
Mid-terrace
End-terrace
Proposed rear projection depth from the ORIGINAL rear wall (m)
Measured from the rear wall of the house as first built — not from any later conservatory or extension.
Maximum overall height (m)
Eaves height if within 2m of any boundary (m, enter 0 if not within 2m)
Does the extension sit forward of the front of the house, or forward of any side that fronts a road?
Is this a side extension?
Width of the side extension as a percentage of the original house width
A.1(j) caps this at 50% — half the original house width. We hard-fail above that.
Is the extension more than one storey?
Will exterior materials match the existing house (colour, brick, render, roof)?
Loft conversion / roof alteration details
House type
Select…
Terraced (including end-terrace)
Detached
Semi-detached
Cubic volume of the proposed enlargement — dormer + hip-to-gable, including any previous roof alterations (m³)
Cap: 40m³ for terraced, 50m³ for detached / semi.
Does any part of the enlargement exceed the highest point of the existing roof?
Is the proposed dormer on the roof slope that forms the front of the house AND faces a road?
Will the dormer's lowest edge be at least 0.2m above the eaves (or is the work hip-to-gable with no dormer)?
Is the project a combination of hip-to-gable + crown roof + new dormer + chimney removal?
Outbuilding details
What will the outbuilding be used for? (tick all that apply)
Will it contain a full kitchen (hob + oven + sink beyond a handwash)?
Will it contain a shower or bathtub?
Will it contain a bedroom or sleeping accommodation?
Will it contain a WC only (no shower, no bath)?
Proposed footprint of the outbuilding (m²)
Existing ground-floor footprint of the dwelling (m²)
Maximum overall height (m)
Eaves height (m)
Roof type
Select…
Dual-pitched
Mono-pitch
Flat
Is any part of the outbuilding within 2m of a boundary?
Will it sit forward of the front of the house?
Combined footprint of ALL existing buildings EXCLUDING the original house (sheds, garages, conservatories, existing outbuildings) PLUS the proposed outbuilding (m²)
Is the land clearly part of the domestic garden (not a paddock, field or adjacent parcel)?
Will it have a verandah, balcony, or raised platform higher than 0.3m?
When was it built, and what evidence do you have?
For a retrospective certificate we need to show continuous use for at least 4 years (for dwellings / extensions) or 10 years (for a change of use). Simon will walk through your evidence before we submit.
Approximately when was the work completed?
Briefly, what was built?
Evidence you can provide (tick all that apply)
Since it was built, has anyone from the council contacted you about it (enforcement notice, warning letter, visit)?
Photographs
We need at least 6 photos to submit your application. You'll upload them after payment from your customer dashboard — just confirm you can take them now.
Can you photograph: front elevation from the street, rear elevation, both sides, curtilage showing existing outbuildings, and boundary fences?