Are you a property professional?Get qualified leads from motivated homeowners.
Get startedAre you a property professional?Get qualified leads from motivated homeowners.
Get started21a is a semi-detached house in Lambeth, London, London (SE21 8JD). It has a recorded floor area of 84 m² (around 904 sq ft), construction records dating it to 1996-2002 and council tax band F. The latest certificate (June 2025) shows a D (score 67), on the cusp of jumping into the C band. Earlier certificates rated it C (June 2013); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Very Good; while window efficiency dropped from Average to Poor and hot-water efficiency dropped from Good to Average. The recommended improvements would push it to C (score 70). At 84 m² this is the 15th smallest of 40 units on EPC record in the building, where floor areas span 49–217 m². The building's EPC ratings span E to B across 40 units on file.
It hasn't traded since June 2004, a hold of 22 years that's notably long for the area. 5 planning records sit against the property, 1 approved, 2 refused. Past consents include an extension, meaningful when judging how the property has evolved. Today's modelled estimate of £598,000 is 32.9% above the 2004 sale price. On a £-per-square-foot basis, the last sale (£498/sq ft) was about 44.4% above the typical sold price in the postcode.
A recent planning application at 21a was refused — worth checking the council file.
Extension: Side of property
21a valuation sits well clear of the typical sold price in this postcode.
£598,000
Modelled from EPC, postcode comparables.
£450,000
Recorded with HM Land Registry.
Everything we know about this property, compiled into one in-depth, downloadable report.
Detailed AI analysis
On habitable rooms, 21a stands well clear of the street.
Price per m²
£5,357
Street avg £5,235
Floor Area
84 m²
Street avg 77 m²
Habitable Rooms
5 rooms
Street avg 3 rooms
Rail-style transport is unusually close for this postcode.
Crime
6/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Thurlow Park Road — bus stop.

Daytime· 07:00 – 23:00
54.0dB

Changes detected from historical EPC data
Heating controls changed
Hot water system changed
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
Conversion of existing property into 3 flats involving the erection of a part 1 part 2 side extensions with associated bike and bin stores. (RECONSULTATION DUE TO UPDATED PLANS AND ADDITIONAL SUPPORTING DOCUMENTS)
Extension: Part single, part two storey · Side of property
Erection of part two storey, part single storey side extensions, revised fenestration and change of use of ground floor from dwelling (C3) to nursery (E).
3 more applications for this property
Join to see all planning history.
18 June 2004Most recent
£450,000
Median price across the last 5 sales in SE21 8JD: £480,000 (2025–2024).
An AI-written breakdown of everything that matters
Detailed EPC data
Full energy ratings, history and recommendations
Related properties
Comparable homes and street-level pricing
Full planning history
Every application and decision on record
Ad-free · Instant access · Secure Stripe checkout · One-off payment
CO₂ Emissions
2.1 t/year
Street avg 2.6 t/year
SE21 8NS
Closest school
0.4 km
The Elmgreen School. 64 schools nearby.
Night-time· 23:00 – 07:00
45.1dB