What type of property is 23 Duncan Close, CF3 1NP?

23 Duncan Close, CF3 1NP is a 3-bedroom semi-detached house.

What did 23 Duncan Close, CF3 1NP sell for?

23 Duncan Close, CF3 1NP last sold for £245,000 in August 2025. Land Registry has 4 sales on record going back to £55,000 in December 1997. Source: HM Land Registry.

Has 23 Duncan Close, CF3 1NP appreciated in value?

Across 4 sales between December 1997 and August 2025, 23 Duncan Close, CF3 1NP rose from £55,000 to £245,000, a change of £190,000. That works out to roughly +5.5% per year compounded over 28 years. Source: HM Land Registry.

What is the EPC rating for 23 Duncan Close, CF3 1NP?

The current EPC rating for 23 Duncan Close, CF3 1NP is C with a score of 71 out of 100, lodged in May 2024. The assessor estimates the property could reach a B. Source: EPC Register.

What is the floor area of 23 Duncan Close, CF3 1NP?

23 Duncan Close, CF3 1NP has a recorded floor area of 81 m² (872 sq ft), around 27 m² per bedroom. That makes it about 25% larger than the median EPC-recorded property in CF3 1NP. Source: EPC Register.

How is 23 Duncan Close, CF3 1NP heated?

The latest EPC at 23 Duncan Close, CF3 1NP records mains gas as the main heating fuel. Source: EPC Register.

What council tax band is 23 Duncan Close, CF3 1NP?

23 Duncan Close, CF3 1NP is in council tax band D.

Where is 23 Duncan Close, CF3 1NP located?

23 Duncan Close, CF3 1NP sits in St. Mellons, Cardiff, Cardiff. It falls within the CF3 postcode district.

What is crime like near 23 Duncan Close, CF3 1NP?

Police records around 23 Duncan Close, CF3 1NP show an average of 242 reported crimes per month over the last 18 months. Violent crime makes up roughly 36% of reports, the most common category. The overall trend is falling (22% versus the prior period). Source: Police UK.

How well connected is 23 Duncan Close, CF3 1NP?

The closest bus stop to 23 Duncan Close, CF3 1NP is Ty Coch Court, 88m away. In total there are 30 bus stops within the surrounding area.

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23 Duncan Close, St Mellons, Cardiff, CF3 1NP

4 sales on record

Estimated value

£257,000

Since the 2025 sale (£245,000)+5%
Against CF3 1NP's recent median (£240,000)+7%

Newest record on this page: October 2025. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation

Property type

Semi-detached

Bedrooms

Bathroom

Floor area

81 m²

872 sq ft

Energy rating

Score 71

Council tax

Band D

Tenure

Owner Occupied

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Valuation

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

£257,000

Against its 2025 sale (£245,000)+5%
Against CF3 1NP's recent median (£240,000)+7%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 23 Duncan Close is modelled from its 81 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in CF3 1NP. 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
81 m² from the EPC lodged in May 2024
Sales of this home
4 sales recorded, the latest in 2025
Recent sales in CF3 1NP
5 sales, median £240,000 (2025–2024)

This page or the full report?

Data	This page	Full report
Sales	Latest sale shown: October 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

Price

Sales history & valuation

Every recorded sale of this home, how its price has moved, and what neighbouring properties have sold for.

23 Duncan Close has more than quadrupled in price since its earliest registered sale in 1997.

Sales timeline

25 August 2025Most recent
£245,000
+65.5%over 9 years
9 June 2016
£148,000
+164.3%over 17 years
18 June 1998
£55,995
+1.8%over 6 months
12 December 1997
£55,000

Median price across the last 5 sales in CF3 1NP: £240,000 (2025–2024).

Nearby sales in CF3 1NP

Risks

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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Overview

About 23 Duncan Close

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

23 Duncan Close is a three-bedroom semi-detached house in St. Mellons, Cardiff, Cardiff (CF3 1NP). It has a recorded floor area of 81 m² (around 872 sq ft), construction records dating it to 1996-2002 and council tax band D. The latest certificate (May 2024) shows a C (score 71). The rating has held steady at C across 2 certificates since May 2010. Between certificates, roof efficiency went from Poor to Average; while lighting dropped from Very Good to Good. The recommended improvements would push it to B (score 85). Other recorded features include a conservatory.

A recent sale: £245,000 in August 2025. At 81 m² it's 19.1% larger than the typical home in the postcode (68 m² median across 17 EPCs). Across 1997–2025, sale prices on this property compounded at 5.5% per year. On a £-per-square-foot basis, the last sale (£281/sq ft) was about 36.9% above the typical sold price in the postcode.

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

Bedrooms3
Bathrooms1
Dining roomYes
ConservatoryYes

Outside

Private gardenFront and rear
DrivewayYes

Building

RefurbishedYes

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Energy

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)

May 2024

EPC Rating

C71

Main Heating

Gas

Main Fuel

Gas

Hot Water

Good

Windows

Good

CO2 Emissions

2.7 t/year

Occupancy

Owner Occupied

Certificate validity

Valid until 19 May 2034

7 years remaining

Property Improvements

Changes detected from historical EPC data

May 2024from May 2010

Roof

PoorAverage

Roof insulation improved

Floor Insulation

UninsulatedPartial

Floor insulation added or improved

Low Energy Lighting

81%45%

Low energy lighting percentage decreased

Planning

Planning history

Applications and permits filed against 23 Duncan Close, St Mellons, Cardiff, CF3 1NP, sourced from the PlanIt planning register.

23 Duncan Close has no planning applications on record.

A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.

On the street

Versus other Duncan Close homes

Four headline reads against 17 similar houses on this street, drawn from the latest EPC and Land Registry data.

23 Duncan Close outperforms the street on floor area by a wide margin.

Price per m²

£3,025

Street avg £2,812

Above

Floor Area

81 m²

Street avg 64 m²

Strongly above

Habitable Rooms

6 rooms

Street avg 4 rooms

Strongly above

CO₂ Emissions

2.7 t/year

Street avg 2.2 t/year

Strongly below

Area

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.

Full Cardiff report

Crime

242/mo

Falling year-on-year across the wider district.

Nearest stop

0.1 km

Ty Coch Court — bus stop.

Nearest stops

Ty Coch CourtBus stop88m
The MountBus stop101m
Hendre RoadBus stop117m
Menai WayBus stop184m

Most reported crime locally

Violence & Sexual Offences1,550 reports36%
Anti-social Behaviour627 reports14%
Public Order468 reports11%
Criminal Damage & Arson424 reports10%

Go deeper on the local area

A Local Area report breaks down crime, transport links, schools and air quality in depth.

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Late 20th centurySemi-Detached HouseEPC C

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Comparables

Similar properties nearby

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

£256k

1 Duncan Close, St Mellons

CF3 1NP

3 bed1 bath

£246k

1 Meadvale Court, Meadvale Road

CF3 1UG

3 bed2 bath

£213k

1 Abergele Road, Rumney

CF3 1RR

3 bed1 bath

£203k

1 Dovey Close, Rumney

CF3 1RJ

3 bed

£215k

1 Llanina Grove, Rumney

CF3 1SW

4 bed

£205k

1 Canopus Close, St Mellons

CF3 1NR

2 bed1 bath

£214k

1 Meadvale Road

CF3 1UF

£213k

1 Heol Newydd

CF3 1DW

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Method

How to read this page

Where every figure above comes from, how current it is and what it can't tell you.

Valuation method in detail

How the estimate is made: The estimate for 23 Duncan Close is modelled from its 81 m² EPC floor area, its 4 recorded sales and recent sales of comparable homes in CF3 1NP. 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 23 Duncan Close. 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 23 Duncan Close was lodged in May 2024 at band C and is valid until May 2034. 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 23 Duncan Close. 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 CF3 1NP.
Council tax band: 23 Duncan Close 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.

FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 23 Duncan Close, St Mellons, Cardiff, CF3 1NP. Each answer is also embedded as structured data for search engines.

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