21 South Hills, Brill, Aylesbury, HP18 9TQ
About 21 South Hills
21 South Hills is a detached house in Brill, Aylesbury, Aylesbury (HP18 9TQ). It has a recorded floor area of 124 m² (around 1335 sq ft), construction records dating it to before 1900 and council tax band G. The latest certificate (November 2025) shows a C (score 79), near the top of the C band. When first surveyed in September 2010 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Very Good, roof efficiency went from Poor to Very Good and window efficiency went from Poor to Very Good. The recommended improvements would push it to B (score 88). Main heating runs on electricity: electricity, unspecified tariff. This certificate was lodged in the last six months, so the rating reflects current condition.
3 planning records sit against the property, 2 approved, 1 refused. Past consents include partial demolition and new windows, meaningful when judging how the property has evolved. At 124 m² it's 20.5% smaller than the typical home in the postcode (156 m² median across 11 EPCs). Its energy rating outperforms most of the postcode (better than 82% of similar EPCs). On a £-per-square-foot basis, the last sale (£1,349/sq ft) was about 336.1% above the typical sold price in the postcode. Last sale on file: £1,800,000 in April 2024.
Everything you need to know about 21 South Hills
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
21 South Hills's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency decreased
Window efficiency improved
Wall insulation improved
Floor insulation added or improved
More low energy lighting installed
Heat pump installed, significantly improving energy efficiency
Changed to a more efficient fuel source
Heating controls upgraded for better temperature management
Hot water efficiency improved
High performance glazing installed
Cavity wall insulation installed
Roof insulation improved
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £1,795 · Includes VAT
Planning history
A recent planning application at 21 South Hills was refused — worth checking the council file.
3 applications on record at 21 South Hills, Brill, Aylesbury, HP18 9TQ
- Mar 2006RenovationFullOutcome in report
Installation of new bay window
New Windows- Documents
- 7 docs on file
- Reference
- 06/00241/APP
- More recent applications — locked
- AmendmentMar 2024Decision
- DemolitionMay 2023Decision
Unlock 21 South Hills, Brill, Aylesbury, HP18 9TQ'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 2 notable nearby
- The 67 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Sales history & valuation
Latest sale on 21 South Hills was the highest on Land Registry record across the postcode.
£1,717,000
Modelled from EPC, postcode comparables.
£1,800,000
Recorded with HM Land Registry.
Sales timeline
9 April 2024Most recent
£1,800,000
Median price across the last 5 sales in HP18 9TQ: £785,000 (2025–2018).
Nearby sales in HP18 9TQ
23 South Hills, Brill, Aylesbury, HP18 9TQ
Sold Aug 2025
£295,1005 South Hills, Brill, Aylesbury, HP18 9TQ
Sold May 2022
£785,0004 South Hills, Brill, Aylesbury, HP18 9TQ
Sold Aug 2020
£526,5004a, South Hills, Brill, Aylesbury, HP18 9TQ
Sold Aug 2018
£915,00015 South Hills, Brill, Aylesbury, HP18 9TQ
Sold Jul 2018
£990,000
Versus other South Hills homes
21 South Hills outperforms the street on price per m² by a wide margin.
Price per m²
£14,516
Street avg £3,552
Floor Area
124 m²
Street avg 157 m²
CO₂ Emissions
0.5 t/year
Street avg 7.7 t/year
Years Held
2 years
Street avg 10 years
Everything you need to know about 21 South Hills
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee

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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
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
The Square — bus stop.
Closest school
0.6 km
Brill Church of England School. 2 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
45.0dB

Night-time· 23:00 – 07:00
36.2dB






