What kind of home is 15 Windmill Street, HP18 9SZ?

15 Windmill Street, HP18 9SZ is a 4-bedroom semi-detached house, which has been extended.

What did 15 Windmill Street, HP18 9SZ sell for?

15 Windmill Street, HP18 9SZ last sold for £575,000 in November 2020, around 6 years ago. Before that, it sold for £86,500 in May 1996, so prices have been rising over 25 years on record. Source: HM Land Registry.

How has the value of 15 Windmill Street, HP18 9SZ changed over time?

Across 2 sales between May 1996 and November 2020, 15 Windmill Street, HP18 9SZ rose from £86,500 to £575,000, a change of £488,500. That works out to roughly +8% per year compounded over 25 years. Source: HM Land Registry.

What is the EPC rating for 15 Windmill Street, HP18 9SZ?

The current EPC rating for 15 Windmill Street, HP18 9SZ is D with a score of 55 out of 100, lodged in June 2025. It has improved from a E recorded in July 2020. Source: EPC Register.

How big is 15 Windmill Street, HP18 9SZ?

15 Windmill Street, HP18 9SZ has a recorded floor area of 133 m² (1,432 sq ft), around 33 m² per bedroom. That makes it about 30% larger than the median EPC-recorded property in HP18 9SZ. Source: EPC Register.

What heating system does 15 Windmill Street, HP18 9SZ use?

The latest EPC at 15 Windmill Street, HP18 9SZ records oil as the main heating fuel. Source: EPC Register.

Are there any planning records for 15 Windmill Street, HP18 9SZ?

15 Windmill Street, HP18 9SZ has council approval for rear extension granted in April 2003 under ref. 03/00302/APP. Source: PlanIt planning register.

What is the council tax band for 15 Windmill Street, HP18 9SZ?

15 Windmill Street, HP18 9SZ is in council tax band E.

Which area is 15 Windmill Street, HP18 9SZ in?

15 Windmill Street, HP18 9SZ sits in Brill, Aylesbury, Aylesbury. It falls within the HP18 postcode district.

What is crime like near 15 Windmill Street, HP18 9SZ?

Police records around 15 Windmill Street, HP18 9SZ show an average of 2 reported crimes per month over the last 5 months. Other theft makes up roughly 55% of reports, the most common category. The overall trend is broadly stable. Source: Police UK.

What schools are near 15 Windmill Street, HP18 9SZ?

The closest primary school to 15 Windmill Street, HP18 9SZ is Brill Church of England School (345m), one of 2 primaries within walking distance.

What is the nearest station to 15 Windmill Street, HP18 9SZ?

The closest bus stop to 15 Windmill Street, HP18 9SZ is Church Street, 235m away. In total there are 10 bus stops within the surrounding area.

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15 Windmill Street, Brill, Aylesbury, HP18 9SZ

1 planning record

Property type

Semi-detached

Bedrooms

Bathrooms

Floor area

133 m²

1432 sq ft

Energy rating

Score 55

Council tax

Band E

Tenure

Owner Occupied

Overview

About 15 Windmill Street

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

15 Windmill Street is a four-bedroom semi-detached house in Brill, Aylesbury, Aylesbury (HP18 9SZ). It has a recorded floor area of 133 m² (around 1432 sq ft), construction records dating it to before 1900 and council tax band E. The latest certificate (June 2025) shows a D (score 55), a step below the typical UK home. When first surveyed in July 2020 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency dropped from Average to Poor and lighting dropped from Very Good to Good. Main heating runs on oil. Period features are noted in the property record. Records show the property has been extended at some point in its history.

At 133 m² the property is well over the postcode median (94 m² across 12 EPCs), placing it in the larger end of the local stock. One planning record on file: an extension approved in 2003. Past consents include an extension, meaningful when judging how the property has evolved. Across 1996–2020, sale prices on this property compounded at 8% per year. Today's modelled estimate of £663,000 is 15.3% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£402/sq ft) was about 21.8% above the typical sold price in the postcode. Most recent transfer: November 2020 at £575,000.

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

Bedrooms4
Bathrooms2
StudyYes

Outside

Private gardenYes

Building

Period featuresYes
Previously extendedYes

Before you decide

Everything you need to know about 15 Windmill Street

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

Larger development activity nearby

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The data behind every report

Energy

Energy performance

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

15 Windmill Street's carbon output runs well above what efficient homes in the postcode produce.

Current Certificate(1 of 2)

Jun 2025

EPC Rating

D55

Main Heating

Gas

Main Fuel

Oil

Hot Water

Average

Windows

Average

CO2 Emissions

6.5 t/year

Occupancy

Owner Occupied

Property Improvements

Changes detected from historical EPC data

Jun 2025from Jul 2020

EPC improved fromE51toD55

Heating Controls

FullFull Control

Heating controls upgraded for better temperature management

Ventilation

NaturalExtract

Mechanical ventilation installed

Get a survey for this property

Level 3 Building Survey

Victorian-eraSemi-Detached HouseEPC DPre-1919 buildExtended multiple times (2+ extensions)No mains gasSolid (non-cavity) walls

Because the property was built before 1919, has been extended more than once, and has no mains gas supply, we believe a Level 3 building survey should be considered.

From £1,155 · Includes VAT

Planning

Planning history

Applications and permits filed against 15 Windmill Street, Brill, Aylesbury, HP18 9SZ, sourced from the PlanIt planning register.

15 Windmill Street has an approved rear extension on the planning record.

1 application on record at 15 Windmill Street, Brill, Aylesbury, HP18 9SZ

1decisions1extensions4documents2nearby

Apr 2003
ExtensionFull
Outcome in report
Extension: Rear of property
Pitched roof over sun room to rear
Documents
4 docs on file
Reference
03/00302/APP
Full record in report

Unlock 15 Windmill Street, Brill, Aylesbury, HP18 9SZ'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 2 notable nearby
The 4 documents, officer reports & conditions
What the pattern means for extending or converting here

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One time fee only - money back guarantee

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.

Price for 15 Windmill Street has grown more than fourfold since the 1996 starting point.

Current estimate

£663,000

Modelled from EPC, postcode comparables and a sale-price growth of 8.0% per year over 25 years.

See how we calculated this

Last sold (2020)

£575,000

Growth on file: 8.0% per year over 25 years.

Sales timeline

23 November 2020Most recent
£575,000
+564.7%over 24 years
23 May 1996
£86,500

Median price across the last 5 sales in HP18 9SZ: £435,000 (2021–2020).

Nearby sales in HP18 9SZ

On the street

Versus other Windmill Street homes

Four headline reads against 12 similar houses on this street, drawn from the latest EPC and Land Registry data.

Years Held for 15 Windmill Street lags the street by a wide margin.

Price per m²

£4,323

Street avg £3,900

Above

Floor Area

133 m²

Street avg 101 m²

Above

Habitable Rooms

6 rooms

Street avg 5 rooms

Above

CO₂ Emissions

6.5 t/year

Street avg 6.4 t/year

Below

Before you decide

Everything you need to know about 15 Windmill Street

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

Larger development activity nearby

Pick your report · every report is £14.99

One time fee only - money back guarantee

The data behind every report

Comparables

Similar properties nearby

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

£625k

1 Bridge Road, Ickford

HP18 9HU

5 bed

£795k

1 Burts Lane, Long Crendon

HP18 9AJ

3 bed2 bath

£533k

1 Brookside, Oakley

HP18 9PN

3 bed1 bath

£831k

1 Ashtree Cottages, Thame Road, Chilton

HP18 9LJ

5 bed

£1.1m

1 Carters Lane, Long Crendon

HP18 9DE

5 bed

£354k

1 Bradley Close, Oakley

HP18 9QS

3 bed1 bath

£351k

1 Burns Close, Long Crendon

HP18 9BX

2 bed1 bath

£720k

1 Blanes Close, Long Crendon

HP18 9GD

Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Aylesbury district page.

Full Aylesbury report

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

0.2 km

Church Street — bus stop.

Closest school

0.3 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.

Noise

Road noise across the postcode

Modelled day and night-time noise levels around HP18 9SZ from Defra's strategic mapping. The pin marks this postcode's centroid.

Daytime· 07:00 – 23:00

44.4dB

Low

Night-time road noise heatmap for HP18 9SZ

Night-time· 23:00 – 07:00

36.1dB

Low

55 dB

60 dB

65 dB

70 dB

75 dB

80 dB

Defra Road Noise Strategic Mapping, Round 4

FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 15 Windmill Street, Brill, Aylesbury, HP18 9SZ. Each answer is also embedded as structured data for search engines.