20a, High Street, Chislehurst, BR7 5AN
About 20a
20a is a mid-terrace house in Chislehurst (BR7 5AN). It has a recorded floor area of 61 m² (around 657 sq ft), construction records dating it to 1900-1929 and council tax band C. At 61 m² this is the 10th smallest of 11 units on EPC record in the building, where floor areas span 30–72 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (April 2022) shows a C (score 69), just inside the C band. When first surveyed in January 2012 the rating was F, the property has climbed 3 bands since. Between certificates, roof efficiency went from Very Poor to Good, window efficiency went from Poor to Good and hot-water efficiency went from Average to Good.
Today's modelled estimate of £342,000 is 37.8% below the 2019 sale of £550,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. At 61 m² it's 16.2% larger than the typical home in the postcode (53 m² median across 10 EPCs). Sold October 2019 for £550,000.
Know exactly what you're buying at 20a
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
Replaced storage heaters with gas boiler
Connected to mains gas supply
Heating controls upgraded for better temperature management
Hot water system upgraded
Windows upgraded, improving insulation
Heating controls upgraded for better temperature management
Windows upgraded, improving insulation
Roof insulation improved
Planning history
20a has no planning applications on record.
Notable planning nearby
6applications of note in the surrounding area
We flagged 1 thing worth checking at 20a
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
20a valuation runs notably under the typical sold price in this postcode.
£342,000
Modelled from EPC, postcode comparables.
£550,000
Recorded with HM Land Registry.
Sales timeline
2 October 2019Most recent
£550,000
Median price across the last 5 sales in BR7 5AN: £835,000 (2025–2019).
Nearby sales in BR7 5AN
Everything we know about 20a, 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 High Street homes
On floor area, 20a stands well clear of the street.
EPC Rating
69 (C)
Street avg 65 (D)
Floor Area
61 m²
Street avg 50 m²
CO₂ Emissions
2.4 t/year
Street avg 2.2 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
Similar properties nearby
The neighbourhood at a glance
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Chislehurst Sainsbury's — bus stop.
Closest school
0.3 km
Orion Mead Road. 23 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
50.5dB
Night-time· 23:00 – 07:00
41.8dB