Land by postcode · SE area · SE21
What the open records say about the SE21 postcode district in Greater London: recent sales, planning designations and controls, and the council that decides applications. District-level facts to read before you sell or develop a plot in Southwark, London.
Residential sales recorded by HM Land Registry between 2024-08 and 2026-07. This is market context for the district, not a land valuation: what a plot is worth depends on what can be built on it, which these figures do not show.
Sales in 24 months
311
Median sale price
£740,000
Median £ per m² of floor area
£10,492
Median, last 12m vs prior 12m
-1.4%
£740,000 → £730,000
Mix of sales: 6% detached, 21% semi-detached, 23% terraced, 50% flats.
New-build sales 2023–2024: 5 of 344 (1%). A rough proxy for recent building activity: these are homes sold by builders, not development sites.
For each designation on the planning.data.gov.uk register, the share of the 296 live postcodes in SE21 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
91 of 296 postcodes
Dulwich Village · Dulwich Wood · Rosendale Road · Park Hall Road
13 of 296 postcodes
7 separate directions recorded, each removing particular permitted development rights within a defined area.
No postcodes in SE21 fall inside: Green Belt, National Landscape (AONB), National Park.
Flood zones, tree preservation orders, local plan allocations, settlement boundaries and non-designated heritage are not included here and are checked in a full assessment.
31% of postcodes fall within a conservation area. Inside one, demolition needs consent, some permitted development rights are reduced, and new work is assessed against the character and appearance of the area.
These are district-level facts. The free assessment checks your actual boundary against the same registers and the local plan and tells you plainly what they mean for your plot.
Decided planning applications in SE21 since 2021, from the council registers, grouped by the kind of scheme a landowner might be weighing up. Extensions, conditions and tree works are left out. Counts, not estimates.
Taken from the units table on the planning form itself, so this is homes actually created, not a reading of the description. 13 decided since 2021, 3 refused, typically 255 days to a decision.
9 of 13
approved, 69%
47% across London
19 homes approved of 27 applied for
Approved examples
2 Gallery Road London Southwark SE21 7AB (2 new homes)
Temporary change of use of residential accommodation within a boarding house (Use Class C2) related to a school (F1) to independent accommod...
Approved 2022-07-04, Southwark ref 21/AP/2034
Grange Cottage Grange Lane London Southwark SE21 7LH (1 new home)
Demolition of existing Grange Cottage and the construction of part-one, part-two storey dwelling, including basement excavation, terrace con...
Approved 2023-04-17, Southwark ref 22/AP/3540
Land Rear 41 College Road London Southwark SE21 7BA (1 new home)
Construction of a new self contained single storey two bedroom dwelling house on a partitioned plot of land to the rear of 41 College Road
Approved 2024-04-12, Southwark ref 23/AP/0581
By the kind of plot, from the wording of each proposal:
15 decided since 2021, 3 refused, typically 147 days to a decision
9 of 15
approved, 60%
43% across London
Approved examples
4 Frank Dixon Close London Southwark SE21 7BD
Demolition of the existing two-storey detached dwelling and erection of a new two-storey detached dwelling, a single storey detached garden ...
Approved 2021-08-04, Southwark ref 21/AP/0757
57 Alleyn Road London Southwark SE21 8AD
Demolition of existing vacant detached single family house and erection of replacement detached, two-storey, single family house, with basem...
Approved 2023-04-03, Southwark ref 22/AP/1085
Grange Cottage Grange Lane London Southwark SE21 7LH
Demolition of existing Grange Cottage and the construction of part-one, part-two storey dwelling, including basement excavation, terrace con...
Approved 2023-04-17, Southwark ref 22/AP/3540
4 decided since 2021, typically 187 days to a decision
3 of 4
approved
49% across London
Approved examples
111 Burbage Road London Southwark SE21 7AF
Demolition of existing property and construction of a replacement dwelling with additional basement level.
Approved 2023-12-08, Southwark ref 23/AP/1085
Grove House Dulwich Common London Southwark SE21 7EZ
Demolition of the existing residential building and the erection of a two storey dwelling including ancillary garden / bike store, terracing...
Approved 2025-11-14, Southwark ref 25/AP/0324
14 Alleyn Park London Southwark SE21 8SB
Demolition of existing dwelling and construction of 1no. replacement dwelling.
Approved 2025-08-13, Southwark ref 25/AP/1187
Also decided here: 23 applications for outbuildings, annexes or garden buildings, 19 approved, typically 64 days.
Decided planning applications (not extensions, conditions or tree works) in this postcode district from the councils' own registers, classified by the wording of each proposal. Counts, not estimates; where a class has fewer than three applications it is not shown.
SE21 is split between planning authorities: Southwark (61% of sampled postcodes), Lambeth (39% of sampled postcodes).
Draw your boundary, tell us what you own, and an architect checks it against these registers and the local plan. Free, no obligation, and you get a straight written answer.
It depends on where the plot sits, not on the district average. In SE21, 0% of postcodes are in the Green Belt, 31% in a conservation area. Outside those designations the questions that decide it are whether the plot is inside or adjoining the settlement boundary in the local plan, whether it has its own road access, and what is next to it. A plot on the edge of a village or town with access has the best chance; an open field outside the settlement boundary rarely gets consent for housing whatever the market is doing.
Often, yes. 4% of postcodes in SE21 are under an Article 4 direction (7 separate directions), which withdraws particular permitted development rights, so an outbuilding, extension or change of use that is automatic elsewhere needs an application there. Outside those areas, permitted development applies to houses and their gardens but not to agricultural land or paddocks, where a new building or a new use normally needs permission or prior approval.
Developers look at three things before they talk about price: whether the plot is outside the Green Belt and any National Landscape, whether it sits inside or beside the settlement boundary, and what finished homes sell for. In SE21 the median sale is £740,000, and only 1% of 2023–2024 sales were new-build homes, so builders have been quiet here. A single plot usually goes to a local builder or a self-builder; a site for five or more homes attracts regional housebuilders, normally through an option or a conditional contract rather than an outright purchase, so the price you see quoted is not the price you receive.
There is no district figure for land, because a plot's value comes from what can be built on it, not from where it is. As a guide, a serviced plot with consent for one house commonly sells for around a third of the finished house value, which in SE21 would be measured against a £740,000 median sale. The same plot without consent, or inside the Green Belt, is worth a small fraction of that, and a paddock with no realistic route to consent is worth agricultural or amenity value only. The free check tells you which of those your plot is before you talk to anyone about a price.
Three places: the local plan and its policies map for the settlement boundary and allocations, the council's planning register for what has been approved or refused on neighbouring land, and planning.data.gov.uk for the national designations. That is an evening's work if you know what you are looking for. The alternative is to draw your boundary on this site: an architect checks it against the same records and writes back within 48 hours with a plain answer, free and without obligation.
Computed from open-data records; district-level, not plot-level measurements. Sales: HM Land Registry Price Paid Data (2024-08-01 to 2026-07-31), © Crown copyright, Open Government Licence. Designations: planning.data.gov.uk (OGL), retrieved 2026-09-05; conservation areas and Article 4 directions are made locally and published on that national register. Postcode centroids: OS Code-Point Open 2026.3.0, contains OS data © Crown copyright and database right 2026. Place name is the most common post town in the sales records. Figures computed 2026-09-06.