12 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ
About 12 Chapman Lane
12 Chapman Lane is a three-bedroom detached house in Flackwell Heath, High Wycombe, High Wycombe (HP10 9AZ). It has a recorded floor area of 212 m² (around 2282 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (March 2021) shows a C (score 74). When first surveyed in September 2018 the rating was F, the property has climbed 3 bands since. Between certificates, window efficiency went from Very Poor to Good, hot-water efficiency went from Very Poor to Good and main heating went from Average to Good. The recommended improvements would push it to B (score 82). Our model identifies extension potential, subject to local planning policy. The home occupies a corner plot.
At 212 m² the property is well over the postcode median (139 m² across 17 EPCs), placing it in the larger end of the local stock. One planning record on file: an extension approved in 2019. Past consents include an extension, meaningful when judging how the property has evolved. Today's modelled estimate of £860,000 is 49% above the 2018 sale price. On a £-per-square-foot basis, the last sale (£253/sq ft) was about 18.3% below the postcode norm. Most recent transfer: December 2018 at £577,000.
What this property has
Inside
- Bedrooms3
- Bathrooms1
Outside
- Private gardenRear
- Corner plotYes
Building
- Extension potentialPossible
Energy performance
EPC Rating
Certificate validity
Valid until 30 March 2031
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
Windows upgraded, improving insulation
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property has been extended more than once, we believe a Level 3 building survey should be considered.
From £1,360 · Includes VAT
Planning history
12 Chapman Lane has an approved side and rear extension on the planning record.
1 application on record at 12 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ
- Jan 2019ExtensionFullOutcome in report
Extension: Side and rear of property
Householder application for part two storey side and part single storey rear extension
- Documents
- 4 docs on file
- Reference
- 18/08151/FUL
Unlock 12 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (1 on record)
- All 1 application on this property in full, plus 3 notable nearby
- The 4 documents, officer reports & conditions
- What the pattern means for extending or converting here
One time fee only - money back guarantee
Sales history & valuation
12 Chapman Lane valuation sits well clear of the typical sold price in this postcode.
£860,000
Modelled from EPC, postcode comparables.
£577,000
Recorded with HM Land Registry.
Sales timeline
19 December 2018Most recent
£577,000
Median price across the last 5 sales in HP10 9AZ: £740,000 (2025–2021).
Nearby sales in HP10 9AZ
10 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ
Sold Jan 2025
£716,00013 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ
Sold Oct 2024
£900,00025 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ
Sold Oct 2022
£667,00014 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ
Sold Dec 2021
£870,0005b, Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ
Sold Sept 2021
£740,000
Versus other Chapman Lane homes
12 Chapman Lane outperforms the street on habitable rooms by a wide margin.
Price per m²
£2,722
Street avg £4,380
Floor Area
212 m²
Street avg 139 m²
Habitable Rooms
9 rooms
Street avg 6 rooms
CO₂ Emissions
4.8 t/year
Street avg 4.7 t/year
Similar properties nearby
1 Cherrywood Gardens, Flackwell Heath
HP10 9AX
1 Aspen Road
HP10 9FA
1 Birfield Road, Loudwater
HP10 9TW
1 Conway Close, Loudwater
HP10 9TR
1 Cherry Rise, Flackwell Heath
HP10 9PS
1 Chilterns Close, Flackwell Heath
HP10 9BB
1 Bracken Way, Flackwell Heath
HP10 9JX
1 Chiltern Green, Flackwell Heath
HP10 9AJ
The neighbourhood at a glance
Crime
59/mo
Falling year-on-year across the wider district.
Nearest stop
0.1 km
Highlands — bus stop.
Closest school
0.3 km
Juniper Hill School. 11 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
50.1dB

Night-time· 23:00 – 07:00
40.7dB







