Model valuation£417,0008 Busby Close
Local market context
20 Clos Cwm Du, Pontprennau, Cardiff, CF23 8LE
3 sales on record
Estimated value
£530,000
- Since the 2022 sale (£505,000)+5%
- Against CF23 8LE's recent median (£315,000)+68%
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
Detached
Bedrooms
4
Bathrooms
2
Floor area
156 m²
1679 sq ft
Energy rating
D
Score 68
Council tax
Band F
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
£530,000
- Against its 2022 sale (£505,000)+5%
- Against CF23 8LE's recent median (£315,000)+68%
Your note and figure are shown publicly on this page.
How the estimate is made
The estimate for 20 Clos Cwm Du is modelled from its 156 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in CF23 8LE. 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
156 m² from the EPC lodged in December 2022
Sales of this home
3 sales recorded, the latest in 2022
Recent sales in CF23 8LE
5 sales, median £315,000 (2025–2017)
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 | 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.
Latest sale on 20 Clos Cwm Du was the highest on Land Registry record across the postcode.
Sales timeline
27 October 2022Most recent
£505,000
+50.7%over 3 years9 November 2018
£335,000
+183.9%over 20 years6 February 1998
£118,000
Median price across the last 5 sales in CF23 8LE: £315,000 (2025–2017).
Nearby sales in CF23 8LE
23 Clos Cwm Du, Pontprennau, Cardiff, CF23 8LE
Sold Nov 2025
£280,00030 Clos Cwm Du, Pontprennau, Cardiff, CF23 8LE
Sold May 2023
£395,00027 Clos Cwm Du, Pontprennau, Cardiff, CF23 8LE
Sold Oct 2022
£285,00018 Clos Cwm Du, Pontprennau, Cardiff, CF23 8LE
Sold Jan 2022
£335,00012 Clos Cwm Du, Pontprennau, Cardiff, CF23 8LE
Sold Aug 2017
£315,000
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 20 Clos Cwm Du
A plain-English summary derived from public records, EPC certificates, sold prices and local data.
20 Clos Cwm Du is a four-bedroom detached house in Pontprennau, Cardiff, Cardiff (CF23 8LE). It has a recorded floor area of 156 m² (around 1679 sq ft), construction records dating it to 1991-1995 and council tax band F. The latest certificate (December 2022) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (January 2009); the latest reading is one band lower. Between certificates, lighting went from Poor to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Very Good to Good. The recommended improvements would lift it to B (score 81), a 2-band jump.
At 156 m² the property is well over the postcode median (91 m² across 18 EPCs), placing it in the larger end of the local stock. Across 1998–2022, sale prices on this property compounded at 6.1% per year. On a £-per-square-foot basis, the last sale (£301/sq ft) was about 72.3% above the typical sold price in the postcode. Most recent transfer: October 2022 at £505,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
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 20 Clos Cwm Du
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.
Recommended upgrades on file would lift this property by multiple EPC bands.
Current Certificate(1 of 3)
Dec 2022
EPC Rating
A
B
C
D
D68
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
5.2 t/year
Occupancy
Owner Occupied
Certificate validity
Valid until 18 December 2032
Property Improvements
Changes detected from historical EPC data
Dec 2014from Jan 2009
EPC improved fromC69toE49
Hot Water
Very GoodAverage
Hot water efficiency decreased
Roof Insulation
InsulatedWell Insulated
Loft insulation upgraded to recommended levels
Dec 2022from Dec 2014
EPC improved fromE49toD68
Hot Water
AverageGood
Hot water efficiency improved
Wall Insulation
UninsulatedInsulated Cavity
Cavity wall insulation installed
Floor Insulation
UninsulatedPartial
Floor insulation added or improved
Low Energy Lighting
29%100%
More low energy lighting installed
Planning history
Applications and permits filed against 20 Clos Cwm Du, Pontprennau, Cardiff, CF23 8LE, sourced from the PlanIt planning register.
20 Clos Cwm Du 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 Cwm Du homes
Four headline reads against 18 similar houses on this street, drawn from the latest EPC and Land Registry data.
Floor Area for 20 Clos Cwm Du runs comfortably ahead of the street norm.
Price per m²
£3,237
Street avg £2,687
Floor Area
156 m²
Street avg 93 m²
Habitable Rooms
8 rooms
Street avg 5 rooms
CO₂ Emissions
5.2 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
0.1 km
Clos Cwm Du — bus stop.
Nearest stops
- Clos Cwm DuBus stop76m
- Sindercombe ClBus stop230m
- Pontprennau Community CentreBus stop259m
- The FarthingsBus stop377m
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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Late 20th centuryDetached HouseEPC D
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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.
£503k
1 Acorn Grove, Pontprennau
CF23 8NG
4 bed2 bath
£488k
1 Allt Y Wennol, Pontprennau
CF23 8AS
4 bed2 bath
£417k
1 Clos Nant Y Cwm, Pontprennau
CF23 8LG
4 bed2 bath
£401k
1 Clos Nant Mwlan, Pontprennau
CF23 8NA
4 bed2 bath
£381k
1 Blackberry Way, Pontprennau
CF23 8FE
4 bed2 bath
£363k
1 Clos Dol Heulog, Pontprennau
CF23 8AT
3 bed
£327k
1 Amberwood Close, Pontprennau
CF23 8BZ
3 bed
£321k
1 Clos Alyn, Pontprennau
CF23 8LB
3 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 20 Clos Cwm Du is modelled from its 156 m² EPC floor area, its 3 recorded sales and recent sales of comparable homes in CF23 8LE. 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 20 Clos Cwm Du. 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 Clos Cwm Du was lodged in December 2022 at band D and is valid until December 2032. 3 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 20 Clos Cwm Du. 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 8LE.
- Council tax band
- 20 Clos Cwm Du is in council tax band F. 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 Clos Cwm Du, Pontprennau, Cardiff, CF23 8LE. Each answer is also embedded as structured data for search engines.
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- Every home in CF23 8LESold prices, values and energy ratings for the postcode
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- 20 Clos Cwm Du, Pontprennau, Cardiff valuationHow the estimate is built and what moves it
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