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21 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ

Extendable2 planning records

Estimated value

£868,000

  • Since the 2004 sale (£435,000)+100%
  • Against HP10 9AZ's recent median (£740,000)+17%

Newest record on this page: January 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Detached
Bedrooms
3
Bathroom
1
Floor area
173 m²
1862 sq ft
Energy rating
E
Score 39
Council tax
Band F
Tenure
Owner Occupied
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Valuation

About this valuation

How the figure is worked out and what it's based on. If you know this home, you can tell other visitors what you think it's worth.

Our estimate

£868,000

  • Against its 2004 sale (£435,000)+100%
  • Against HP10 9AZ's recent median (£740,000)+17%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 Chapman Lane is modelled from its 173 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in HP10 9AZ. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.

What it's based on

  • Floor area

    173 m² from the EPC lodged in June 2016

  • Sales of this home

    1 sale recorded, the latest in 2004

  • Recent sales in HP10 9AZ

    5 sales, median £740,000 (2025–2021)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: January 2025Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
Planning1 of 2 applicationsFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

21 Chapman Lane valuation sits well clear of the typical sold price in this postcode.

Sales timeline

  1. 30 September 2004Most recent

    £435,000

Median price across the last 5 sales in HP10 9AZ: £740,000 (2025–2021).

Risks

What this page doesn't show

1 potential issue has already been flagged for 21 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ. The detail, evidence and what to ask about it are in the Risks Report.
  • A planning decision worth checkingIn report
  • Flood risk from rivers, sea and surface waterIn report
  • Subsidence and ground-stability signalsIn report
  • Refusals, enforcement and big schemes nearbyIn report

One time fee only - money back guarantee

Overview

About 21 Chapman Lane

A plain-English summary derived from public records, EPC certificates, sold prices and local data.

21 Chapman Lane is a three-bedroom detached house in Flackwell Heath, High Wycombe, High Wycombe (HP10 9AZ). It has a recorded floor area of 173 m² (around 1862 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (June 2016) shows an E (score 39), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 70), a 2-band jump. The latest certificate is from June 2016, so improvements made since then won't be reflected. Our model identifies extension potential, subject to local planning policy.

It hasn't traded since September 2004, a hold of 22 years that's notably long for the area. Today's modelled estimate of £868,000 sits 99.5% above the 2004 sale of £435,000. On a £-per-square-foot basis, the last sale (£234/sq ft) was about 24.6% below the postcode norm. 2 planning records sit against the property, 1 approved, 1 refused. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved. At 173 m² it's 24.7% larger than the typical home in the postcode (139 m² median across 17 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 82% of similar EPCs).

Specifications

What this property has

Pulled from EPC certificates, claim submissions and our property model. Empty categories are hidden — we only show what's known.

Inside

  • Bedrooms3
  • Bathrooms1

Outside

  • Private gardenYes

Building

  • RefurbishedYes
  • Extension potentialPossible
Before you decide

Everything you need to know about 21 Chapman Lane

The true value, the hidden risks and the full sale history, in one report.

A planning decision worth checking

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Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
Energy

Energy performance

Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.

21 Chapman Lane's carbon output runs well above what efficient homes in the postcode produce.

EPC Expired

This certificate is over 10 years old and is no longer valid.Expired 15 Jun 2026

Current Certificate
Jun 2016

EPC Rating

A
B
C
D
E
E39
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Average
Windows
Good
CO2 Emissions
11.0 t/year
Occupancy
Owner Occupied

Certificate validity

Expired on 15 June 2026

New assessment needed to sell or let
Planning

Planning history

Applications and permits filed against 21 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ, sourced from the PlanIt planning register.

A recent planning application at 21 Chapman Lane was refused — worth checking the council file.

2 applications on record at 21 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ

2decisions1extensions77documents3nearby
Flagged:Retrospective
  1. Aug 2016
    ConservatoryFull
    Outcome in report

    Householder application for construction of rear conservatory (retrospective)

    RetrospectiveExtension
    Documents
    6 docs on file
    Reference
    16/06465/FUL
    Full record in report
  2. More recent applications — locked
  3. New BuildDecision

Unlock 21 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 (2 on record)
  • All 2 applications on this property in full, plus 3 notable nearby
  • The 77 documents, officer reports & conditions
  • What the pattern means for extending or converting here
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On the street

Versus other Chapman Lane homes

Four headline reads against 17 similar houses on this street, drawn from the latest EPC and Land Registry data.

On epc rating, 21 Chapman Lane runs well behind the street norm.

Price per m²

£2,514

Street avg £4,394

Strongly below

Floor Area

173 m²

Street avg 141 m²

Strongly above

Habitable Rooms

8 rooms

Street avg 6 rooms

Strongly above

CO₂ Emissions

11.0 t/year

Street avg 4.3 t/year

Strongly below
Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the High Wycombe district page.
Full High Wycombe report

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.

Nearest schools

  • Juniper Hill SchoolPrimary314m
  • Carrington Junior SchoolPrimary708m
  • Carrington Infant SchoolPrimary708m
  • Loudwater Combined SchoolPrimary1.3km

Nearest stops

  • HighlandsBus stop101m
  • Chapman LaneBus stop124m
  • GreenlandsBus stop148m
  • Straight BitBus stop314m

Most reported crime locally

  • Violence & Sexual Offences355 reports36%
  • Anti-social Behaviour133 reports13%
  • Other Theft89 reports9%
  • Criminal Damage & Arson87 reports9%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around HP10 9AZ from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime road noise heatmap for HP10 9AZ

Daytime· 07:00 – 23:00

50.1dB

Low
Night-time road noise heatmap for HP10 9AZ

Night-time· 23:00 – 07:00

40.7dB

Low
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

Mid 20th centuryDetached HouseEPC E

We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.

From £1,095 · Includes VAT

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£844k

1 Cherrywood Gardens, Flackwell Heath

HP10 9AX

3 bed2 bath
£564k

1 Aspen Road

HP10 9FA

3 bed2 bath
£529k

1 Birfield Road, Loudwater

HP10 9TW

3 bed2 bath
£483k

1 Conway Close, Loudwater

HP10 9TR

3 bed1 bath
£934k

1 Cherry Rise, Flackwell Heath

HP10 9PS

4 bed2 bath
£765k

1 Chilterns Close, Flackwell Heath

HP10 9BB

4 bed2 bath
£748k

1 Bracken Way, Flackwell Heath

HP10 9JX

4 bed1 bath
£676k

1 Chiltern Green, Flackwell Heath

HP10 9AJ

4 bed2 bath

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.
Valuation method in detail
How the estimate is made
The estimate for 21 Chapman Lane is modelled from its 173 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in HP10 9AZ. It is an automated estimate, not a survey or mortgage valuation: condition, layout and improvements that aren't on record can move the real figure either way.
Where sold prices come from
Sold prices are HM Land Registry Price Paid Data, which covers residential sales in England and Wales since 1995. 1 sale is recorded for 21 Chapman Lane. Sales normally appear two to three months after completion, so the most recent ones take time to show up anywhere.
Reading the EPC
Energy Performance Certificates rate homes from A (most efficient) to G and last 10 years. The latest one for 21 Chapman Lane was lodged in June 2016 at band E and expired in June 2026, so a new one is needed to sell or let. Floor area, heating and insulation details on this page come from it.
Planning records
Planning applications are collected from local authority registers through PlanIt. 2 applications are matched to 21 Chapman Lane. Councils sometimes file applications under a different address format, and applications on neighbouring land aren't listed here; the report covers both.
Area figures
Crime is police-recorded street-level data over the last 17 months, which places each incident at an approximate point. The 11 schools and 30 stops listed are measured in a straight line from HP10 9AZ, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
Council tax band
21 Chapman Lane is in council tax band F. Bands are set by the Valuation Office Agency from historic values (1 April 1991 in England, 1 April 2003 in Wales), not today's price; the amount you pay depends on the council's rate for the band.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 21 Chapman Lane, Flackwell Heath, High Wycombe, HP10 9AZ. Each answer is also embedded as structured data for search engines.

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