21a, Windmill Road, Thame, OX9 2DR
About 21a
21a is a detached house in Thame (OX9 2DR). It has a recorded floor area of 97 m² (around 1047 sq ft), construction records dating it to 2003-2006 and council tax band D. The latest certificate (June 2010) shows a C (score 76), near the top of the C band. The latest certificate is from June 2010, so improvements made since then won't be reflected.
It hasn't traded since September 2010, a hold of 16 years that's notably long for the area. Across 2007–2010, sale prices on this property compounded at 3% per year. Today's modelled estimate of £509,000 sits 51.9% above the 2010 sale of £335,000. At 97 m² it's 18.4% larger than the typical home in the postcode (82 m² median across 23 EPCs). Its energy rating outperforms most of the postcode (better than 74% of similar EPCs). One historical planning record sits against the property in 2012.
Know exactly what you're buying at 21a
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
21a's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 21 Jun 2020
EPC Rating
Planning history
- Aug 2012OutbuildingFullIn report
Single garage and driveway.
- Documents
- 4 docs on file
- Reference
- P12/S1278/HH
We flagged 1 thing worth checking at 21a
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
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Sales history & valuation
21a valuation sits well clear of the typical sold price in this postcode.
£509,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.0% per year over 4 years.
£335,000
Growth on file: 3.0% per year over 4 years.
Sales timeline
8 September 2010Most recent
£335,000
+11.7%over 3 years3 January 2007
£300,000
Median price across the last 5 sales in OX9 2DR: £450,000 (2025–2022).
Everything we know about 21a, 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 Windmill Road homes
EPC Rating for 21a runs comfortably ahead of the street norm.
Price per m²
£3,443
Street avg £4,772
Floor Area
97 m²
Street avg 79 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
2.7 t/year
Street avg 3.9 t/year
Similar properties nearby
The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Upper High Street — bus stop.
Closest school
0.4 km
John Hampden Primary School. 4 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
46.8dB
Night-time· 23:00 – 07:00
37.6dB