Model valuation£417,0008 Busby Close
Local market context
21 Castle Street, Aylesbury, HP20 2RE
3 sales on record4 planning records
Estimated value
£395,000
- Since the 2020 sale (£309,950)+27%
- Against HP20 2RE's recent median (£285,000)+39%
Newest record on this page: March 2024. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Mid terrace
Bedrooms
3
Bathroom
1
Floor area
133 m²
1432 sq ft
Energy rating
D
Score 60
Council tax
Band D
Tenure
Owner Occupied
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
£395,000
- Against its 2020 sale (£309,950)+27%
- Against HP20 2RE's recent median (£285,000)+39%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 21 Castle Street is modelled from its 133 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in HP20 2RE. 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
133 m² from the EPC lodged in December 2019
Sales of this home
3 sales recorded, the latest in 2020
Recent sales in HP20 2RE
5 sales, median £285,000 (2024–2017)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: March 2024 | Latest available records, read when you order |
| Valuation | Estimate from the last refresh | Analysed against comparable sales |
| Planning | 1 of 4 applications | Full history, plus nearby schemes |
| Flood risk | Not shown | Included |
Sales history & valuation
Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.
The latest sale landed in the post-pandemic price surge — useful context when reading the figure.
Sales timeline
28 May 2020Most recent
£309,950
+18.8%over 10 years29 January 2010
£261,000
+13.5%over 4 years20 October 2005
£230,000
Median price across the last 5 sales in HP20 2RE: £285,000 (2024–2017).
Nearby sales in HP20 2RE
What this page doesn't show
1 potential issue has already been flagged for 21 Castle Street, Aylesbury, HP20 2RE. The detail, evidence and what to ask about it are in the Risks Report.
- Larger development activity nearbyIn 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
About 21 Castle Street
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
21 Castle Street is a three-bedroom mid-terrace house in Aylesbury (HP20 2RE). It has a recorded floor area of 133 m² (around 1432 sq ft), construction records dating it to 1930-1949 and council tax band D. The latest certificate (December 2019) shows a D (score 60), on the cusp of jumping into the C band. When first surveyed in October 2009 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Average, window efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. The recommended improvements would lift it to B (score 83), a 2-band jump. Other recorded features include a balcony.
At 133 m² the property is well over the postcode median (70 m² across 10 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 70% of similar EPCs). 4 planning records sit against the property, 1 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. The record references listed-building consent, which constrain future alterations. Across 2005–2020, sale prices on this property compounded at 2.1% per year. Today's modelled estimate of £395,000 is 27.4% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£217/sq ft) was about 21.1% below the postcode norm. Last sale on file: £309,950 in May 2020.
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
- FireplaceYes
Outside
- Private gardenRear
- ParkingAllocated
- BalconyYes
Building
- Heating systemGas
- RefurbishedYes
Before you decide
Everything you need to know about 21 Castle 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 performance
Every EPC certificate filed against this property — current rating, recorded improvements, and where there's headroom to reach a higher band.
Recommended upgrades on file would lift this property by multiple EPC bands.
Current Certificate(1 of 2)
Dec 2019
EPC Rating
A
B
C
D
D60
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
5.3 t/year
Occupancy
Owner Occupied
Certificate validity
Valid until 19 December 2029
Property Improvements
Changes detected from historical EPC data
Dec 2019from Oct 2009
EPC improved fromE49toD60
Heating Controls
Prog + TRVsFull
Heating controls upgraded for better temperature management
Hot Water
Very GoodGood
Hot water efficiency decreased
Windows
SecondaryFull Double
Windows upgraded, improving insulation
Roof
Very PoorAverage
Roof insulation improved
Low Energy Lighting
0%73%
More low energy lighting installed
Planning history
Applications and permits filed against 21 Castle Street, Aylesbury, HP20 2RE, sourced from the PlanIt planning register.
21 Castle Street has 2 separate extension applications on the council record.
4 applications on record at 21 Castle Street, Aylesbury, HP20 2RE
4decisions2extensions47documents4nearby
Flagged:Listed building
- Mar 2006ExtensionFullOutcome in report
Extension: Single storey · Rear of property
Single storey rear extension with extended flat roof, new first floor door access to balcony and creation of new fire escape staircase.
- Documents
- 10 docs on file
- Reference
- 06/00220/APP
- More recent applications — locked
- RenovationDec 2009Decision
- RenovationAug 2006Decision
+ 1 more application in the report
Unlock 21 Castle Street, Aylesbury, HP20 2RE's full planning history
You're seeing the shape of it. The report has the substance.
- Every decision — granted, refused or withdrawn (4 on record)
- All 4 applications on this property in full, plus 4 notable nearby
- The 47 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Versus other Castle Street homes
Four headline reads against 10 similar houses on this street, drawn from the latest EPC and Land Registry data.
Floor Area for 21 Castle Street runs comfortably ahead of the street norm.
Price per m²
£2,330
Street avg £3,691
Floor Area
133 m²
Street avg 81 m²
Habitable Rooms
5 rooms
Street avg 4 rooms
CO₂ Emissions
5.3 t/year
Street avg 5.0 t/year
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.
Rail-style transport is unusually close for this postcode.
Crime
164/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
Morrisons — bus stop.
Closest school
0.6 km
Buckinghamshire College Group. 27 schools nearby.
Nearest schools
- Buckinghamshire College Group16 plus586m
- Sir Henry Floyd Grammar SchoolSecondary695m
- Bearbrook Combined SchoolPrimary777m
- Oak Green SchoolPrimary793m
Nearest stops
- MorrisonsBus stop163m
- Friarage RoadBus stop199m
- Great Western StreetBus stop205m
- Bus StationBus stop220m
Most reported crime locally
- Violence & Sexual Offences1,051 reports36%
- Shoplifting539 reports18%
- Public Order279 reports9%
- Anti-social Behaviour245 reports8%
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
Modelled day and night-time noise levels around HP20 2RE from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
55.4dB
Night-time· 23:00 – 07:00
46.0dB
55 dB
60 dB
65 dB
70 dB
75 dB
80 dB
Defra Road Noise Strategic Mapping, Round 4
Get a survey for this property
Level 3 Building Survey
Early 20th centuryMid-Terrace HouseEPC DSolid (non-cavity) walls
Because the property has solid (non-cavity) walls, we believe a Level 3 building survey should be considered.
From £955 · Includes VAT
Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
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Start your researchHow to read this page
Where every figure above comes from, how current it is and what it can't tell you.
- How the estimate is made
- The estimate for 21 Castle Street is modelled from its 133 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in HP20 2RE. 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. 3 sales are recorded for 21 Castle Street. 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 Castle Street was lodged in December 2019 at band D and is valid until December 2029. 2 certificates are on record, which shows how the home has changed.
- Planning records
- Planning applications are collected from local authority registers through PlanIt. 4 applications are matched to 21 Castle Street. 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 18 months, which places each incident at an approximate point. The 27 schools and 30 stops listed are measured in a straight line from HP20 2RE, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
- Council tax band
- 21 Castle Street is in council tax band D. 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.
Common questions
The questions buyers, sellers and homeowners most often ask about 21 Castle Street, Aylesbury, HP20 2RE. Each answer is also embedded as structured data for search engines.
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