Model valuation£417,0008 Busby Close
Local market context
20 Blackwell Avenue, Guildford, GU2 8LU
4 planning records
Estimated value
£525,000
- Since the 2025 sale (£400,000)+31%
- Against GU2 8LU's recent median (£450,000)+17%
Newest record on this page: November 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Semi-detached
Bedrooms
3
Bathroom
1
Floor area
151 m²
1625 sq ft
Energy rating
C
Score 69
Council tax
Band D
Tenure
Private Rental
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
£525,000
- Against its 2025 sale (£400,000)+31%
- Against GU2 8LU's recent median (£450,000)+17%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 20 Blackwell Avenue is modelled from its 151 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in GU2 8LU. 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
151 m² from the EPC lodged in November 2018
Sales of this home
2 sales recorded, the latest in 2025
Recent sales in GU2 8LU
5 sales, median £450,000 (2024–2021)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: November 2025 | 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.
20 Blackwell Avenue valuation sits well clear of the typical sold price in this postcode.
Sales timeline
21 November 2025Most recent
£400,000
+60.0%over 20 years4 August 2005
£250,000
Median price across the last 5 sales in GU2 8LU: £450,000 (2024–2021).
Nearby sales in GU2 8LU
20a, Blackwell Avenue, Guildford, GU2 8LU
Sold Aug 2024
£405,00014 Blackwell Avenue, Guildford, GU2 8LU
Sold Jul 2024
£450,00025 Blackwell Avenue, Guildford, GU2 8LU
Sold Sept 2022
£510,00023 Blackwell Avenue, Guildford, GU2 8LU
Sold Aug 2021
£425,00010 Blackwell Avenue, Guildford, GU2 8LU
Sold Jun 2021
£495,000
What this page doesn't show
2 potential issues have already been flagged for 20 Blackwell Avenue, Guildford, GU2 8LU. The detail, evidence and what to ask about it are in the Risks Report.
- Signs of HMO activity in the areaIn 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
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About 20 Blackwell Avenue
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
20 Blackwell Avenue is a three-bedroom semi-detached house in Guildford (GU2 8LU). It has a recorded floor area of 151 m² (around 1625 sq ft), construction records dating it to 1950-1966 and council tax band D. The latest certificate (November 2018) shows a C (score 69), just inside the C band. When first surveyed in October 2008 the rating was E, the property has climbed 2 bands since. Between certificates, window efficiency went from Average to Good, hot-water efficiency went from Average to Good and main heating went from Average to Good; while lighting dropped from Average to Poor. The recommended improvements would push it to B (score 83).
At 151 m² the property is well over the postcode median (89 m² across 25 EPCs), placing it in the larger end of the local stock. Most recent transfer was November 2025 at £400,000 — fresh data. 4 planning records sit against the property, 2 approved, 1 refused. Past consents include an extension and subdivision, meaningful when judging how the property has evolved. Across 2005–2025, sale prices on this property compounded at 2.3% per year. Today's modelled estimate of £525,000 is 31.3% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£246/sq ft) was about 28% below the postcode norm.
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
- EnsuiteYes
Outside
- Private gardenYes
Building
- RefurbishedYes
Before you decide
Everything you need to know about 20 Blackwell Avenue
The true value, the hidden risks and the full sale history, in one report.
Signs of HMO activity in the areaLarger 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.
Current Certificate(1 of 2)
Nov 2018
EPC Rating
A
B
C
C69
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Good
CO2 Emissions
5.1 t/year
Occupancy
Rented
Certificate validity
Valid until 8 November 2028
Property Improvements
Changes detected from historical EPC data
Nov 2018from Oct 2008
EPC improved fromE52toC69
Heating Controls
Prog + StatFull
Heating controls upgraded for better temperature management
Hot Water
AverageGood
Hot water efficiency improved
Windows
AverageGood
Window efficiency improved
Ventilation
ExtractNatural
Ventilation system changed
Planning history
Applications and permits filed against 20 Blackwell Avenue, Guildford, GU2 8LU, sourced from the PlanIt planning register.
Council records show a subdivision application — the property's legal arrangement has been altered.
4 applications on record at 20 Blackwell Avenue, Guildford, GU2 8LU
3decisions3extensions33documents36nearby
Flagged:Subdivision
- Mar 2010ExtensionFullOutcome in report
Extension: Two storey · Rear of property
Two storey rear extension and conversion of existing house into one three bedroom dwelling and one two bed dwelling (as amended by drawings received 17/03/10 and 24/03/10).
- Documents
- 14 docs on file
- Reference
- 10/P/00161
- More recent applications — locked
- ConditionsAug 2019Decision
- SubdivisionMar 2017Decision
+ 1 more application in the report
Unlock 20 Blackwell Avenue, Guildford, GU2 8LU'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 4 applications on this property in full, plus 36 notable nearby
- The 33 documents, officer reports & conditions
- What the pattern means for extending or converting here
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Versus other Blackwell Avenue homes
Four headline reads against 25 similar houses on this street, drawn from the latest EPC and Land Registry data.
20 Blackwell Avenue is notably below the street on years held.
Price per m²
£2,649
Street avg £3,934
Floor Area
151 m²
Street avg 97 m²
Habitable Rooms
7 rooms
Street avg 5 rooms
CO₂ Emissions
5.1 t/year
Street avg 3.4 t/year
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the Guildford district page.
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
196/mo
Falling year-on-year across the wider district.
Nearest stop
0.0 km
Blackwell Avenue — bus stop.
Closest school
0.5 km
Guildford Grove Primary School. 13 schools nearby.
Nearest schools
- Guildford Grove Primary SchoolPrimary479m
- Kings College GuildfordSecondary620m
- Wood Street Infant SchoolPrimary800m
- St Joseph's Catholic Primary SchoolPrimary1.2km
Nearest stops
- Blackwell AvenueBus stop18m
- Little PlattBus stop217m
- RickyardBus stop276m
- HomestallBus stop298m
Most reported crime locally
- Violence & Sexual Offences1,394 reports44%
- Anti-social Behaviour347 reports11%
- Public Order316 reports10%
- Criminal Damage & Arson257 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 GU2 8LU from Defra's strategic mapping. The pin marks this postcode's centroid.
Daytime· 07:00 – 23:00
45.8dB
Night-time· 23:00 – 07:00
37.2dB
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
Mid 20th centurySemi-Detached HouseEPC CExtended multiple times (2+ extensions)
Because the property has been extended more than once, we believe a Level 3 building survey should be considered.
From £1,085 · 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 20 Blackwell Avenue is modelled from its 151 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in GU2 8LU. 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. 2 sales are recorded for 20 Blackwell Avenue. 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 20 Blackwell Avenue was lodged in November 2018 at band C and is valid until November 2028. 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 20 Blackwell Avenue. 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 16 months, which places each incident at an approximate point. The 13 schools and 30 stops listed are measured in a straight line from GU2 8LU, not by walking route. Road noise is Defra's strategic noise modelling, averaged across the postcode.
- Council tax band
- 20 Blackwell Avenue 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 20 Blackwell Avenue, Guildford, GU2 8LU. Each answer is also embedded as structured data for search engines.
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