Cedar House, Flat 9, 109 Thurlow Park Road, London, SE21 8JL
About Cedar House
Cedar House is a semi-detached house in London (SE21 8JL). It has a recorded floor area of 59 m² (around 635 sq ft), construction records dating it to 1983-1990 and council tax band D. At 59 m² this is the 4th smallest of 7 units on EPC record in Cedar House, where floor areas span 37–62 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (July 2023) shows a C (score 73). The rating has held steady at C across 4 certificates since November 2009. Between certificates, window efficiency went from Very Poor to Poor and lighting went from Average to Very Good.
Sold May 2019 for £382,000. Across the public record there are 5 sales, relatively high churn for a single property. One planning record on file: new windows approved in 2025. Past consents include new windows, meaningful when judging how the property has evolved. Across 2001–2019, sale prices on this property compounded at 6.1% per year. On a £-per-square-foot basis, the last sale (£602/sq ft) was about 92.9% above the typical sold price in the postcode. At 59 m² it's 28% smaller than the typical home in the postcode (82 m² median across 51 EPCs).
Know exactly what you're buying at Cedar House
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Single glazing replaced with double or better glazing
Window efficiency improved
More low energy lighting installed
Wall insulation improved
Loft insulation installed or upgraded to 250mm+
Planning history
- May 2025RenovationFullIn report
Replacement of all existing windows, ground floor right flank elevation door with double glazed uPVC windows and a composite door.
- Agent
- Archway Building Consultancy
New Windows- Documents
- 12 docs on file
- Reference
- 25/00911/FUL
We flagged 1 thing worth checking at Cedar House
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
Sale price has at least doubled since 2001.
£413,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.1% per year over 18 years.
£382,000
Growth on file: 6.1% per year over 18 years.
Sales timeline
23 May 2019Most recent
£382,000
+52.8%over 5 years26 September 2013
£250,000
26 February 2010
£249,950
+22.8%over 5 years20 May 2004
£203,570
+53.6%over 2 years20 August 2001
£132,500
Median price across the last 5 sales in SE21 8JL: £720,000 (2025–2024).
Nearby sales in SE21 8JL
Apartment 2, 99 Thurlow Park Road, Lambeth, London, SE21 8JL
Sold Mar 2025
£755,000Apartment 6, 99 Thurlow Park Road, Lambeth, London, SE21 8JL
Sold Nov 2024
£730,000Flat 1, 81 Thurlow Park Road, London, SE21 8JL
Sold Aug 2024
£343,000Apartment 8, 99 Thurlow Park Road, Lambeth, London, SE21 8JL
Sold Jun 2024
£720,000Hieover, Flat 2, 101 Thurlow Park Road, Lambeth, London, SE21 8JL
Sold Apr 2024
£450,000
Everything we know about Cedar House, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

Versus other Thurlow Park Road homes
On price per m², Cedar House stands well clear of the street.
Price per m²
£6,475
Street avg £4,312
Floor Area
59 m²
Street avg 83 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
1.8 t/year
Street avg 2.7 t/year
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The neighbourhood at a glance
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
Lancaster Avenue West Dulwich — bus stop.
Closest school
0.4 km
The Elmgreen School. 63 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
54.3dB

Night-time· 23:00 – 07:00
45.5dB