What you could build at CR2 0PR: the planning rules at this address, what neighbours have built and how big, planning decisions nearby, rough costs and the value an extension adds, and how to get started. In Purley North, Croydon.
97extensions seen within 600 m in the last 10 years
9loft conversions within 600 m in the last 10 years
85.7extensions per 1,000 homes in the neighbourhood (10 years)
● work seen on energy certificates · ● application approved · ● refused · ● pending or other · ● this postcode
The rules at this address
Houses usually have permitted development rights: some rear extensions (typically up to 3 m deep for a semi or terrace, 4 m detached), loft conversions within volume limits, and porches can go ahead without planning permission. Larger single-storey rear extensions (up to 6 m / 8 m) can use the “prior approval” neighbour scheme.
Not in a conservation area (from council registers).
No Article 4 direction recorded for this postcode.
Listed buildings need listed building consent for most changes, inside and out: check the National Heritage List.
To be certain work is permitted development, apply for a lawful development certificate (about £129 for householders in England). Building regulations apply either way.
Across England and Wales, homes extended by a typical 30 m² and then resold rose about 11.1% more than similar homes nearby over the same years (124,884 resales). How extensions pay off by size, type and region.
Single-storey rear or side extension: about £2,000–£3,000 per m² (London £2,500–£4,000), plus fees and VAT
Loft conversion: about £45,000–£75,000 for a dormer; more for a mansard or hip-to-gable
Two-storey extension: about £1,800–£2,800 per m² of new floor
Garage conversion: about £15,000–£30,000
Basement: about £3,500–£5,000 per m², London mostly
Build costs are rough 2026 ranges from industry guides, not quotes. Get three quotes for your plans.
Move or improve?
The money you don't get back either way, for the same extra space in Purley North.
Move to a home 20 m² bigger (about £536,000)
Stamp duty on the new home
£16,800
Estate agent on yours 1.2% + VAT
£6,264
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£28,164
Extend by 20 m²
Building, plus 15% for design, planning and contingency
£57,500
Less what it adds to your home's value 60% of the local price
−£60,600
Money gone
−£3,100
On these figures, extending loses about £31,264 less. Moving also changes the area, the schools and the commute; extending means months of building work and depends on planning.
Building costs vary a lot (a single-storey rear extension is often £2,000–£3,000 per m², more in London). How much space adds depends on the home and street: what extensions added to resale prices. A guide, not advice; nothing you type leaves this page.
Getting started
Look at what neighbours did. Open applications above to see drawings that were approved on similar houses, and who designed them.
Check the route: permitted development (with a lawful development certificate), prior approval for larger rear extensions, or full householder planning permission.
Get a measured survey and a designer: an architect, an architectural technologist or a designer who handles planning drawings.
Apply (householder permission is about £258 in England; councils aim to decide within 8 weeks).
Building regulations through the council's building control or an approved inspector, and party wall notices to neighbours if you build on or near the boundary.
Choose a builder: written quotes, a contract, staged payments, and check their insurance and references.
From energy certificates: an extension where a later certificate shows more floor space, a loft conversion where roof rooms appear. Certificates come with sales, lettings and some building work, so the year is when it was first seen.
Not every extension shows here. We only see building work when a new energy certificate is lodged, which happens when a home is sold, let or newly built. A loft or extension added since then won't appear, even with planning permission and building control sign-off, because those records aren't published as open data outside London. Missing work doesn't mean missing paperwork.
26/01828/HSE
345, Selsdon Road, Cr2 6pt
Side extension
Approved
Jul 2026
26/01448/HSE
10, Croham Mount, Cr2 0br
Two-storey extension
Approved
Jul 2026
26/01458/HSE
3, Rockhampton Road, Cr2 7aq
Rear extension
Approved
Jun 2026
26/00814/HSE
20, Newark Road, Cr2 6hq
Loft or dormer
Refused
Apr 2026
25/03854/HSE
83, Blenheim Park Road, Cr2 6bh
Two-storey extension
Refused
Apr 2026
26/00423/HSE
1a, Bynes Road, Cr2 0py
Other householder work
Refused
Mar 2026
26/00368/GPDO
18, Essenden Road, Cr2 0bu
Rear extension
Approved
Mar 2026
26/00105/HSE
69, Mayfield Road, Cr2 0bj
Rear extension
Refused
Feb 2026
25/03955/GPDO
18, Croham Mount, Cr2 0br
Two-storey extension
Approved
Jan 2026
25/03888/HSE
9, Carlton Road, Cr2 0bp
Outbuilding or garden room
Withdrawn
Sept 2026
25/03716/HSE
242, Selsdon Road, Cr2 7aa
Loft or dormer
Approved
Nov 2025
25/02123/HSE
18, Croham Mount, Cr2 0br
Porch or front extension
Approved
Oct 2025
25/02884/HSE
7, Elm Close, Cr2 7ah
Side extension
Approved
Nov 2025
25/02890/HSE
61, Sanderstead Road, Cr2 0pf
Rear extension
Approved
Oct 2025
25/02891/HSE
6, Rockhampton Road, Cr2 7aq
Rear extension
Approved
Nov 2025
25/02568/HSE
94, Mayfield Road, Cr2 0bf
Two-storey extension
Approved
Oct 2025
25/02656/HSE
194, Selsdon Road, Cr2 6pl
Rear extension
Approved
Nov 2025
25/02110/HSE
8, Elm Close, Cr2 7ah
Garage conversion or garage
Approved
Sept 2025
25/01949/HSE
18, Essenden Road, Cr2 0bu
Rear extension
Refused
Aug 2025
25/02293/GPDO
94, Mayfield Road, Cr2 0bf
Side return or wrap-around
Approved
Aug 2025
25/01862/HSE
90, Avondale Road, Cr2 6jb
Side return or wrap-around
Approved
Jul 2025
25/01852/HSE
15, Carlton Avenue, Cr2 0bz
Rear extension
Approved
Nov 2025
25/01242/HSE
85, Blenheim Park Road, Cr2 6bh
Two-storey extension
Approved
Jul 2025
25/01533/HSE
10, Jarvis Road, Cr2 6hu
Rear extension
Approved
Jun 2025
25/01371/GPDO
3, Croham Close, Cr2 0da
Two-storey extension
Approved
Jun 2025
25/01302/HSE
17, Croham Mount, Cr2 0br
Outbuilding or garden room
Approved
Jun 2025
25/00794/HSE
14, Chelsham Road, Cr2 6hy
Loft or dormer
Approved
May 2025
25/00896/HSE
94, Mayfield Road, Cr2 0bf
Loft or dormer
Refused
May 2025
25/00682/HSE
23, Rolleston Road, Cr2 0pt
Side return or wrap-around
Approved
Mar 2025
25/00366/HSE
15, Mayfield Road, Cr2 0bg
Loft or dormer
Approved
Mar 2025
24/04214/HSE
23, Rolleston Road, Cr2 0pt
Loft or dormer
Refused
Jan 2025
24/03874/HSE
252, Selsdon Road, Cr2 7aa
Other householder work
Refused
Feb 2025
24/03900/HSE
56, Mayfield Road, Cr2 0bf
Loft or dormer
Approved
Jan 2025
24/03869/HSE
54, Bynes Road, Cr2 0pr
Loft or dormer
Approved
Jan 2025
24/03803/HSE
Householder applications validated since 2023 within 600 m. The council's page has the drawings, the decision notice and who the agent or architect was. Hover a row for the description. Source: GLA Planning London Datahub.
–
88% (122)
88%
8 weeks
Basement
–
74% (57)
83%
8 weeks
Porch or front extension
–
88% (65)
81%
8 weeks
Share of decided applications approved since 2023 (number decided in brackets). Withdrawn applications aren't counted; many are withdrawn when refusal looks likely.