9a, Arthur Road, Biggin Hill, Westerham, TN16 3DD
About 9a
9a is a property in Biggin Hill, Westerham, Westerham (TN16 3DD). It has council tax band F.
Held since June 2009 — that's 17 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. 3 planning records sit against the property, 2 approved, 1 refused. Past consents include an extension and a garage conversion, meaningful when judging how the property has evolved. Across 2004–2009, sale prices on this property compounded at -2.8% per year.
Know exactly what you're buying at 9a
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
No EPC on record
This property doesn't have an Energy Performance Certificate yet. An EPC is required to sell or let — and unlocks our automated valuation.
Planning history
9a has an approved single-storey rear extension on the planning record.
- Oct 2019ExtensionOutlineIn report
Extension: Single storey · Rear of property
single storey rear extension, extending beyond the rear wall of the house as existing by 5m (beyond the original rear wall by 5m), for which the maximum height would be 3.3m (maximum height of proposed and previous extensions 3.3m), and for which the height of the eaves would be 2.75m (maximum eaves height of proposed and previous extensions 2.75m) - (42 Day Notification for Householder Permitted Development Prior Approval)
- Agent
- James-Dolan Architect
- Documents
- 5 docs on file
- Reference
- 19/03585/HHPA
- Feb 2010Garage ConversionFullIn report
Conversion of garage into a habitable room.
- Documents
- 7 docs on file
- Reference
- 09/03542/FULL6
We flagged 1 thing worth checking at 9a
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
The latest sale fell during the post-2008 dip, often a low-water mark in price comparisons.
£305,000
Growth on file: -2.8% per year over 5 years.
Sales timeline
25 June 2009Most recent
£305,000
-12.9%over 4 years29 July 2004
£350,000
Median price across the last 5 sales in TN16 3DD: £575,000 (2024–2024).
Nearby sales in TN16 3DD
10 Arthur Road, Biggin Hill, Westerham, TN16 3DD
Sold Dec 2024
£575,00017 Arthur Road, Biggin Hill, Westerham, TN16 3DD
Sold Nov 2024
£624,0001 Arthur Road, Biggin Hill, Westerham, TN16 3DD
Sold Nov 2024
£600,00030 Arthur Road, Biggin Hill, Westerham, TN16 3DD
Sold Aug 2024
£540,000Drumossie, Arthur Road, Biggin Hill, Westerham, TN16 3DD
Sold Jun 2024
£550,000
Everything we know about 9a, 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

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The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Norheads Lane — bus stop.
Closest school
0.2 km
Oaklands Primary Academy. 7 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
49.2dB

Night-time· 23:00 – 07:00
40.4dB