1a, Southfield Road, Downley, High Wycombe, HP13 5JZ
About 1a
1a is a four-bedroom detached house in Downley, High Wycombe, High Wycombe (HP13 5JZ). It has a recorded floor area of 168 m² (around 1808 sq ft), construction records dating it to 1930-1949 and council tax band E. The latest certificate (April 2013) shows a D (score 57), a step below the typical UK home. The rating has held steady at D across 2 certificates since June 2011. Between certificates, roof efficiency dropped from Good to Very Poor. The recommended improvements would push it to C (score 76). The latest certificate is from April 2013, so improvements made since then won't be reflected. Our model identifies extension potential, subject to local planning policy.
At 168 m² the property is well over the postcode median (84 m² across 18 EPCs), placing it in the larger end of the local stock. Across 2001–2013, sale prices on this property compounded at 3.5% per year. Today's modelled estimate of £637,000 sits 53.5% above the 2013 sale of £415,000. On a £-per-square-foot basis, the last sale (£229/sq ft) was about 23.3% below the postcode norm. 3 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. Last changed hands 13 years ago, in November 2013.
What this property has
Inside
- Bedrooms4
- EnsuiteYes
Building
- Extension potentialPossible
Everything you need to know about 1a
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
1a'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This certificate is over 10 years old and is no longer valid.Expired 17 Apr 2023
EPC Rating
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 £1,155 · Includes VAT
Planning history
3 applications on record at 1a, Southfield Road, Downley, High Wycombe, HP13 5JZ
- Jul 2004ExtensionFullOutcome in report
Extension: Single storey
Construction of first floor front and rear extensions to form gable ends and enlargement of existing side dormers in connection with first floor accommodation
- Documents
- 6 docs on file
- Reference
- 04/06293/FUL
- More recent applications — locked
- ExtensionSept 2009Decision
- Tree WorksAug 2007Decision
Unlock 1a, Southfield Road, Downley, High Wycombe, HP13 5JZ's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (3 on record)
- All 3 applications on this property in full, plus 11 notable nearby
- The 15 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
1a valuation sits well clear of the typical sold price in this postcode.
£637,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.5% per year over 12 years.
£415,000
Growth on file: 3.5% per year over 12 years.
Sales timeline
11 November 2013Most recent
£415,000
+52.3%over 12 years27 September 2001
£272,500
Median price across the last 5 sales in HP13 5JZ: £400,000 (2025–2022).
Nearby sales in HP13 5JZ
31 Southfield Road, Downley, High Wycombe, HP13 5JZ
Sold Oct 2025
£398,0003 Southfield Road, Downley, High Wycombe, HP13 5JZ
Sold Oct 2024
£425,00015 Southfield Road, Downley, High Wycombe, HP13 5JZ
Sold May 2023
£340,00027 Southfield Road, Downley, High Wycombe, HP13 5JZ
Sold Feb 2023
£400,00035 Southfield Road, Downley, High Wycombe, HP13 5JZ
Sold May 2022
£450,000
Versus other Southfield Road homes
Floor Area for 1a runs comfortably ahead of the street norm.
Price per m²
£2,470
Street avg £3,683
Floor Area
168 m²
Street avg 91 m²
Habitable Rooms
6 rooms
Street avg 5 rooms
CO₂ Emissions
8.2 t/year
Street avg 4.4 t/year
Everything you need to know about 1a
The true value, the hidden risks and the full sale history, in one report.
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The neighbourhood at a glance
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Southfield Road — bus stop.
Closest school
0.3 km
Millbrook Combined School. 16 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
50.9dB

Night-time· 23:00 – 07:00
40.8dB






