9 Sylvester Avenue, Chislehurst, BR7 5ED
About 9 Sylvester Avenue
9 Sylvester Avenue is a four-bedroom semi-detached house in Chislehurst (BR7 5ED). It has a recorded floor area of 118 m² (around 1270 sq ft), construction records dating it to 1950-1966 and council tax band G. The latest certificate (May 2022) shows a C (score 70). When first surveyed in February 2015 the rating was E, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Very Good, hot-water efficiency went from Average to Good and lighting went from Good to Very Good; while wall efficiency dropped from Good to Average. The recommended improvements would push it to B (score 84). Other recorded features include a conservatory.
At 118 m² it's 20.8% smaller than the typical home in the postcode (149 m² median across 9 EPCs). On energy efficiency it sits in the top 10% of properties in this postcode. One planning record on file: an extension approved in 2021. Past consents include an extension, meaningful when judging how the property has evolved. Today's modelled estimate of £1,016,000 is 21.7% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£657/sq ft) was about 50.2% above the typical sold price in the postcode. Last sold in August 2015, so it's been off the market for around 11 years.
Know exactly what you're buying at 9 Sylvester Avenue
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
What this property has
Inside
- Bedrooms4
- Bathrooms1
- Dining roomYes
- CloakroomYes
- EnsuiteYes
- ConservatoryYes
Outside
- Private gardenYes
- GarageYes
Energy performance
9 Sylvester Avenue ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
Roof insulation improved
More low energy lighting installed
Planning history
Council records include a part-single-part-two-storey side and rear extension at 9 Sylvester Avenue.
- Aug 2021ExtensionFullIn report
Extension: Part single, part two storey · Side and rear of property
Part one/two storey side/rear extension and single storey side extension
- Agent
- iPlans
- Documents
- 12 docs on file
- Reference
- 21/02745/FULL6
We flagged 1 thing worth checking at 9 Sylvester Avenue
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
9 Sylvester Avenue valuation sits well clear of the typical sold price in this postcode.
£1,016,000
Modelled from EPC, postcode comparables.
£835,000
Recorded with HM Land Registry.
Sales timeline
24 August 2015Most recent
£835,000
Median price across the last 5 sales in BR7 5ED: £925,000 (2025–2021).
Nearby sales in BR7 5ED
10 Sylvester Avenue, Chislehurst, BR7 5ED
Sold Aug 2025
£920,0005 Sylvester Avenue, Chislehurst, BR7 5ED
Sold May 2025
£975,00011 Sylvester Avenue, Chislehurst, BR7 5ED
Sold May 2024
£1,570,0003 Sylvester Avenue, Chislehurst, BR7 5ED
Sold Apr 2024
£925,0004 Sylvester Avenue, Chislehurst, BR7 5ED
Sold Mar 2021
£820,000
Everything we know about 9 Sylvester Avenue, 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 Sylvester Avenue homes
EPC Rating for 9 Sylvester Avenue runs comfortably ahead of the street norm.
Price per m²
£7,076
Street avg £5,759
Floor Area
118 m²
Street avg 177 m²
Habitable Rooms
7 rooms
Street avg 7 rooms
CO₂ Emissions
3.7 t/year
Street avg 8.7 t/year
Similar properties nearby
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Elmstead Woods — bus stop.
Closest school
0.8 km
Bullers Wood School. 28 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
48.9dB

Night-time· 23:00 – 07:00
38.1dB