Model valuation£417,0008 Busby Close
Local market context
21 Clos Derwen, Cardiff, CF23 5HJ
4 sales on record
Estimated value
£607,000
- Since the 2021 sale (£480,000)+26%
- Against CF23 5HJ's recent median (£407,000)+49%
Newest record on this page: May 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.
Property type
Detached
Bedrooms
4
Bathrooms
2
Floor area
122 m²
1313 sq ft
Energy rating
C
Score 79
Council tax
Band G
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
£607,000
- Against its 2021 sale (£480,000)+26%
- Against CF23 5HJ's recent median (£407,000)+49%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 21 Clos Derwen is modelled from its 122 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in CF23 5HJ. 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
122 m² from the EPC lodged in April 2021
Sales of this home
4 sales recorded, the latest in 2021
Recent sales in CF23 5HJ
5 sales, median £407,000 (2025–2021)
This page or the full report?
| Data | This page | Full report |
|---|---|---|
| Sales | Latest sale shown: May 2025 | Latest available records, read when you order |
| Valuation | Estimate from the last refresh | Analysed against comparable sales |
| Planning | None on this home | 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.
21 Clos Derwen has more than doubled in price since the earliest registered sale in 2000.
Sales timeline
22 August 2021Most recent
£480,000
+32.2%over 6 years15 January 2015
£363,000
+15.2%over 10 years1 July 2004
£315,000
+75.0%over 4 years19 April 2000
£180,000
Median price across the last 5 sales in CF23 5HJ: £407,000 (2025–2021).
What this page doesn't show
Nothing is flagged from the data on this page, but these checks are only run in the report. The detail, evidence and what to ask about it are in the Risks 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 21 Clos Derwen
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
21 Clos Derwen is a four-bedroom detached house in Cardiff (CF23 5HJ). It has a recorded floor area of 122 m² (around 1313 sq ft), construction records dating it to 2007-2011 and council tax band G. The latest certificate (April 2021) shows a C (score 79), near the top of the C band. The rating has held steady at C across 2 certificates since May 2011. The recommended improvements would push it to B (score 87).
Last sale on file: £480,000 in August 2021. Across the public record there are 4 sales, relatively high churn for a single property. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. Across 2000–2021, sale prices on this property compounded at 4.7% per year. Today's modelled estimate of £607,000 is 26.5% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£366/sq ft) was about 70.2% above the typical sold price in the postcode.
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
Before you decide
Everything you need to know about 21 Clos Derwen
The true value, the hidden risks and the full sale history, in one report.
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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)
Apr 2021
EPC Rating
A
B
C
C79
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Good
CO2 Emissions
2.5 t/year
Occupancy
Owner Occupied
Certificate validity
Valid until 19 April 2031
Planning history
Applications and permits filed against 21 Clos Derwen, Cardiff, CF23 5HJ, sourced from the PlanIt planning register.
21 Clos Derwen has no planning applications on record.
1
But the area is active
1 notable application nearby — larger schemes and conversions that could reshape the street. The report maps them all.
Versus other Clos Derwen homes
Four headline reads against 23 similar houses on this street, drawn from the latest EPC and Land Registry data.
EPC Rating for 21 Clos Derwen runs comfortably ahead of the street norm.
Price per m²
£3,934
Street avg £3,072
Floor Area
122 m²
Street avg 116 m²
Habitable Rooms
7 rooms
Street avg 6 rooms
CO₂ Emissions
2.5 t/year
Street avg 3.6 t/year
The neighbourhood at a glance
A condensed read of the local area. Each tile links through to the full breakdown on the Cardiff district page.
Crime
169/mo
Falling year-on-year across the wider district.
Nearest stop
0.2 km
Brandreth Rd — bus stop.
Nearest stops
- Brandreth RdBus stop153m
- Wasdale CloseBus stop200m
- Dorchester CourtBus stop255m
- Alder RoadBus stop261m
Most reported crime locally
- Violence & Sexual Offences995 reports33%
- Anti-social Behaviour345 reports11%
- Public Order344 reports11%
- Shoplifting340 reports11%
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.
Get a survey for this property
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21st centuryDetached HouseEPC C
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Similar properties nearby
A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£619k
1 Clos Derwen
CF23 5HJ
4 bed2 bath
£620k
1 Clos Edno
CF23 5NF
4 bed2 bath
£666k
1 Beatty Avenue
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£669k
1 Bronwydd Close
CF23 5RA
4 bed2 bath
£550k
1 Crystal Avenue
CF23 5QJ
4 bed1 bath
£770k
1 Balaclava Road
CF23 5BB
4 bed3 bath
£470k
1 Clos Tecwyn
CF23 5ND
4 bed2 bath
£567k
1 Boverton Street
CF23 5ES
5 bed
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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 Clos Derwen is modelled from its 122 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in CF23 5HJ. 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. 4 sales are recorded for 21 Clos Derwen. 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 Clos Derwen was lodged in April 2021 at band C and is valid until April 2031. 2 certificates are on record, which shows how the home has changed.
- Planning records
- Planning applications are collected from local authority registers through PlanIt. None is matched to 21 Clos Derwen. 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. Schools and stops are measured in a straight line from CF23 5HJ.
- Council tax band
- 21 Clos Derwen is in council tax band G. 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 Clos Derwen, Cardiff, CF23 5HJ. Each answer is also embedded as structured data for search engines.
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Keep exploring
- Every home in CF23 5HJSold prices, values and energy ratings for the postcode
- CF 23 property marketPrices, postcodes, schools and transport across the district
- 21 Clos Derwen, Cardiff valuationHow the estimate is built and what moves it
- UK house price mapExplore prices by district, year by year
- Report on another addressLook up any home in England and Wales