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

Estimated value

£202,000

  • Since the 2014 sale (£130,000)+55%
  • Against CF3 1NP's recent median (£245,000)-18%

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
2
Bathroom
1
Floor area
57 m²
614 sq ft
Energy rating
C
Score 74
Council tax
Band C
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

£202,000

  • Against its 2014 sale (£130,000)+55%
  • Against CF3 1NP's recent median (£245,000)-18%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 12 Duncan Close is modelled from its 57 m² EPC floor area, its 2 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

    57 m² from the EPC lodged in May 2024

  • Sales of this home

    2 sales recorded, the latest in 2014

  • Recent sales in CF3 1NP

    5 sales, median £245,000 (2025–2024)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: October 2025Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
PlanningNone on this homeFull history, plus nearby schemes
Flood riskNot shownIncluded
Price

Sales history & valuation

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

12 Duncan Close has more than tripled in price since its earliest registered sale in 1999.

Sales timeline

  1. 14 September 2014Most recent

    £130,000

    +205.9%over 14 years

  2. 7 October 1999

    £42,500

Median price across the last 5 sales in CF3 1NP: £245,000 (2025–2024).

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

One time fee only - money back guarantee

Overview

About 12 Duncan Close

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

12 Duncan Close is a two-bedroom semi-detached house in St. Mellons, Cardiff, Cardiff (CF3 1NP). It has a recorded floor area of 57 m² (around 614 sq ft), construction records dating it to 1983-1990 and council tax band C. The latest certificate (May 2024) shows a C (score 74). When first surveyed in April 2014 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Poor to Very Good, window efficiency went from Average to Good and hot-water efficiency went from Average to Good. The recommended improvements would push it to B (score 89). The home occupies a cul-de-sac position.

Across 1999–2014, sale prices on this property compounded at 7.8% per year. Today's modelled estimate of £202,000 sits 55.4% above the 2014 sale of £130,000. On the market in September 2014 and unlisted since — roughly 12 years. At 57 m² it's 16.2% smaller than the typical home in the postcode (68 m² median across 17 EPCs).

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

  • Bedrooms2
  • Bathrooms1

Outside

  • Private gardenRear
  • DrivewayYes
  • Cul-de-sacYes

Building

  • RefurbishedYes
Before you decide

Everything you need to know about 12 Duncan Close

The true value, the hidden risks and the full sale history, in one report.

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Preview of the full property report

The data behind every report

  • HM Land Registry, source of sold price history
  • Department for Education, source of schools data
  • Police.uk, source of crime statistics
  • Department for Transport, source of stations and transport links
  • Environment Agency, source of flood risk data
  • Department for Environment, Food & Rural Affairs, source of road noise data
  • PlanIt, source of planning application records
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 4)
May 2024

EPC Rating

A
B
C
C74
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Good
CO2 Emissions
1.7 t/year
Occupancy
Owner Occupied

Certificate validity

Valid until 5 May 2034

7 years remaining

Property Improvements

Changes detected from historical EPC data

Apr 2017from Apr 2014
Roof
PoorAverage

Roof insulation improved

Low Energy Lighting
57%0%

Low energy lighting percentage decreased

Mar 2024from Apr 2017
EPC improved fromD66toC73
Hot Water
Main (No Stat)Main System

Hot water system upgraded

Low Energy Lighting
0%71%

More low energy lighting installed

May 2024from Mar 2024
Windows
AverageGood

Window efficiency improved

Roof Insulation
PartialWell Insulated

Loft insulation upgraded to recommended levels

Floor Insulation
UninsulatedPartial

Floor insulation added or improved

Planning

Planning history

Applications and permits filed against 12 Duncan Close, St Mellons, Cardiff, CF3 1NP, sourced from the PlanIt planning register.

12 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.

CO₂ Emissions for 12 Duncan Close runs comfortably ahead of the street norm.

Price per m²

£2,281

Street avg £2,859

Strongly below

Floor Area

57 m²

Street avg 66 m²

Below

Habitable Rooms

3 rooms

Street avg 4 rooms

Strongly below

CO₂ Emissions

1.7 t/year

Street avg 2.2 t/year

Strongly above
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.

SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

Late 20th centurySemi-Detached HouseEPC C

We've checked 10 risk factors against the available data for this property and believe a Level 2 HomeBuyer Report could be a suitable option for you.

From £545 · Includes VAT

Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£205k

1 Canopus Close, St Mellons

CF3 1NR

2 bed1 bath
£203k

1 Dovey Close, Rumney

CF3 1RJ

3 bed
£213k

1 Abergele Road, Rumney

CF3 1RR

3 bed1 bath
£246k

1 Meadvale Court, Meadvale Road

CF3 1UG

3 bed2 bath
£256k

1 Duncan Close, St Mellons

CF3 1NP

3 bed1 bath
£215k

1 Llanina Grove, Rumney

CF3 1SW

4 bed
£205k

1 Menai Way, Rumney

CF3 1RG

£199k

1 Dolgoch Close, Rumney

CF3 1QH

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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 12 Duncan Close is modelled from its 57 m² EPC floor area, its 2 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. 2 sales are recorded for 12 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 12 Duncan Close was lodged in May 2024 at band C and is valid until May 2034. 4 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 12 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
12 Duncan Close is in council tax band C. 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 12 Duncan Close, St Mellons, Cardiff, CF3 1NP. Each answer is also embedded as structured data for search engines.

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