What you could build at CR8 2PD: 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 Central, Croydon.
52extensions seen within 600 m in the last 10 years
1loft conversions within 600 m in the last 10 years
56.2extensions 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 Central.
Move to a home 20 m² bigger (about £618,000)
Stamp duty on the new home
£20,900
Estate agent on yours 1.2% + VAT
£7,560
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£33,560
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
−£55,800
Money gone
£1,700
On these figures, extending loses about £31,860 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.
9, Purley Rise, Cr8 3au
Two-storey extension
Approved
Mar 2026
26/00244/HSE
19a, Box Ridge Avenue, Cr8 3as
Two-storey extension
Refused
Mar 2026
26/00129/GPDO
27, Higher Drive, Cr8 2hq
Rear extension
Approved
Mar 2026
26/00003/HSE
99, Downlands Road, Cr8 4jj
Loft or dormer
Refused
Mar 2026
26/00067/HSE
2, Woodland Way, Cr8 2hu
Side extension
Approved
Jan 2026
25/03472/HSE
99, Downlands Road, Cr8 4jj
Loft or dormer
Refused
Dec 2025
25/03172/HSE
10, Graham Road, Cr8 2el
Two-storey extension
Approved
Nov 2025
25/02678/HSE
23, Box Ridge Avenue, Cr8 3as
Other householder work
Approved
Jul 2025
25/01470/HSE
16, Olden Lane, Cr8 2eh
Two-storey extension
Approved
May 2025
25/00474/HSE
24, Lansdowne Road, Cr8 2pa
Rear extension
Approved
Apr 2025
25/00916/GPDO
20, Foxley Hill Road, Cr8 2hb
Rear extension
Approved
Mar 2025
25/00420/HSE
38b, Cliff End, Cr8 1bn
Loft or dormer
Approved
Jan 2025
24/03923/HSE
15, Cliff End, Cr8 1bp
Porch or front extension
Approved
Dec 2024
24/03432/HSE
10, Graham Road, Cr8 2el
Two-storey extension
Refused
Dec 2024
24/03146/HSE
33, Purley Rise, Cr8 3bp
Garage conversion or garage
Approved
Sept 2024
24/02640/HSE
36a, Box Ridge Avenue, Cr8 3aq
Basement
Approved
Dec 2024
24/01952/HSE
1, Furze Lane, Cr8 3ej
Other householder work
Approved
Jul 2024
24/00739/HSE
Le Chalet, Warren Road, Cr8 1aa
Garage conversion or garage
Approved
Oct 2024
24/01297/HSE
37, Brighton Road, Cr8 2lr
Loft or dormer
Approved
Apr 2024
24/00871/HSE
20, Purley Rise, Cr8 3aw
Rear extension
Approved
Apr 2024
24/00091/HSE
4, Foxley Lodge, Dale Road, Cr8 2ea
Rear extension
Approved
Apr 2024
24/00633/HSE
111, Brighton Road, Cr8 4hd
Other householder work
Approved
Oct 2023
23/03538/PAD
1, Olden Lane, Cr8 2eh
Rear extension
Approved
Nov 2023
23/03500/HSE
31, Graham Road, Cr8 2en
Loft or dormer
Withdrawn
Oct 2023
23/03312/HSE
10, Graham Road, Cr8 2el
Loft or dormer
Approved
Sept 2023
23/02854/HSE
4, Purley Rise, Cr8 3au
Other householder work
Approved
Aug 2023
23/02467/HSE
1, Olden Lane, Cr8 2eh
Rear extension
Refused
Aug 2023
23/02282/HSE
29, Graham Road, Cr8 2en
Loft or dormer
Approved
Jul 2023
23/01912/HSE
111, Brighton Road, Cr8 4hd
Other householder work
Withdrawn
Jun 2023
23/01494/PAD
1, Olden Lane, Cr8 2eh
Rear extension
Refused
May 2023
23/01150/HSE
111, Brighton Road, Cr8 4hd
Other householder work
Refused
Apr 2023
23/00979/PAD
33, Purley Rise, Cr8 3bp
Other householder work
Approved
Oct 2023
22/00836/HSE
Le Chalet, Warren Road, Cr8 1aa
Basement
Refused
Mar 2023
22/04986/HSE
27, Higher Drive, Cr8 2hq
Two-storey extension
Approved
Mar 2023
23/00143/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.
89% (9)
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.