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23 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ

EPC B
Property type
End terrace
Floor area
94 m²
1012 sq ft
Energy rating
B
Score 84
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Overview

About 23 Heol Williams

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

23 Heol Williams is an end-of-terrace house in Old St. Mellons, Cardiff, Cardiff (CF3 6AQ). It has a recorded floor area of 94 m² (around 1012 sq ft). The latest certificate (October 2018) returns a B (score 84), comfortably above the UK average. The recommended improvements would push it to A (score 95).

At 94 m² the property is well over the postcode median (71 m² across 57 EPCs), placing it in the larger end of the local stock. A recent sale: £280,000 in March 2026. Across 2018–2026, sale prices on this property compounded at 3.3% per year.

Before you decide

Everything you need to know about 23 Heol Williams

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

Larger development activity nearby

Pick your report · from £14.99

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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.

23 Heol Williams's carbon output is low for the local stock.

Current Certificate
Oct 2018

EPC Rating

A
B
B84
C
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Very Good
CO2 Emissions
1.3 t/year
Occupancy
—

Certificate validity

Valid until 11 October 2028

2 years remaining
SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

End-Terrace HouseEPC B

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

Planning

Planning history

Applications and permits filed against 23 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ, sourced from the PlanIt planning register.

23 Heol Williams 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.

Price

Sales history & valuation

Recorded transactions, our model's current estimate, and a quick read on what neighbouring properties have sold for.
Current estimate

£280,000

Modelled from EPC, postcode comparables and a sale-price growth of 3.3% per year over 7 years.

See how we calculated this
Last sold (2026)

£280,000

Growth on file: 3.3% per year over 7 years.

Sales timeline

  1. 27 March 2026Most recent

    £280,000

    +27.3%over 7 years

  2. 29 October 2018

    £219,995

Median price across the last 5 sales in CF3 6AQ: £250,000 (2026–2025).

On the street

Versus other Heol Williams homes

Four headline reads against 57 similar houses on this street, drawn from the latest EPC and Land Registry data.

Years Held for 23 Heol Williams lags the street by a wide margin.

Price per m²

£2,979

Street avg £3,159

Below

Floor Area

94 m²

Street avg 80 m²

Above

CO₂ Emissions

1.3 t/year

Street avg 1.3 t/year

On par

Years Held

0 years

Street avg 5 years

Strongly below
Before you decide

Everything you need to know about 23 Heol Williams

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

Larger development activity nearby

Pick your report · from £14.99

One time fee only - money back guarantee

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
Comparables

Similar properties nearby

A handful of close matches in the same postcode area, ranked by likeness on bedrooms, type and floor area.
£280k

1 Lewis Crescent, Old St Mellons

CF3 6YQ

£278k

1 Ffordd Crabtree, Old St Mellons

CF3 6AN

£273k

1 Rhodfa Price, Old St Mellons

CF3 6BD

£271k

1 Clos Grehan, Old St Mellons

CF3 6BF

£294k

1 Druidstone House, Druidstone Road, Old St Mellons

CF3 6XF

2 bed1 bath
£296k

1 Bridge Terrace, Michaelston Y Fedw

CF3 6YZ

3 bed
£302k

1 Potter Street, Old St Mellons

CF3 6AR

3 bed2 bath
£311k

1 Heol Swatridge, Old St Mellons

CF3 6AP

3 bed2 bath
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

Rogers Avenue — bus stop.

Go deeper on the local area

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

FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 23 Heol Williams, Old St Mellons, Cardiff, CF3 6AQ. Each answer is also embedded as structured data for search engines.