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21 St Mellons Road, Marshfield, Cardiff, CF3 2TX

EPC B8 planning records

Estimated value

£525,000

  • Since the 2024 sale (£495,000)+6%
  • Against CF3 2TX's recent median (£340,000)+54%

Newest record on this page: January 2026. Land Registry and EPC registers update monthly, so this page can trail them by 2–3 months.

Learn about this valuation
Property type
Detached
Floor area
166 m²
1787 sq ft
Energy rating
B
Score 85
Council tax
Band F
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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

£525,000

  • Against its 2024 sale (£495,000)+6%
  • Against CF3 2TX's recent median (£340,000)+54%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 St Mellons Road is modelled from its 166 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in CF3 2TX. 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

    166 m² from the EPC lodged in October 2022

  • Sales of this home

    1 sale recorded, the latest in 2024

  • Recent sales in CF3 2TX

    5 sales, median £340,000 (2025–2024)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: July 2025Latest available records, read when you order
ValuationEstimate from the last refreshAnalysed against comparable sales
Planning1 of 8 applicationsFull 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.

21 St Mellons Road valuation sits well clear of the typical sold price in this postcode.

Sales timeline

  1. 5 January 2024Most recent

    £495,000

Median price across the last 5 sales in CF3 2TX: £340,000 (2025–2024).

Risks

What this page doesn't show

1 potential issue has already been flagged for 21 St Mellons Road, Marshfield, Cardiff, CF3 2TX. The detail, evidence and what to ask about it are in the Risks Report.
  • Larger development activity nearbyIn 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 21 St Mellons Road

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

21 St Mellons Road is a detached house in Marshfield, Cardiff, Cardiff (CF3 2TX). It has a recorded floor area of 166 m² (around 1787 sq ft), construction records dating it to 2020 and council tax band F. The latest certificate (October 2022) returns a high B (score 85), putting the home a stone's throw from an A rating. The recommended improvements would push it to A (score 92).

At 166 m² the property is well over the postcode median (114 m² across 23 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 87% of similar EPCs). 8 planning records sit against the property, 6 approved, 1 refused. Last sale on file: £495,000 in January 2024.

Before you decide

Everything you need to know about 21 St Mellons Road

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

Larger development activity nearby

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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
Oct 2022

EPC Rating

A
B
B85
C
D
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Very Good
CO2 Emissions
2.2 t/year
Occupancy
—

Certificate validity

Valid until 20 October 2032

5 years remaining
Planning

Planning history

Applications and permits filed against 21 St Mellons Road, Marshfield, Cardiff, CF3 2TX, sourced from the PlanIt planning register.

21 St Mellons Road has been through 6 approved planning applications — a well-evolved property.

8 applications on record at 21 St Mellons Road, Marshfield, Cardiff, CF3 2TX

1 live now
7decisions258documents1nearby
Flagged:Retrospective
  1. Dec 2015
    Demolition And RebuildFull
    Outcome in report

    DEMOLITION OF EXISTING DWELLING AND ERECTION OF 4NO. REPLACEMENT DWELLINGS INCLUDING WIDENING OF ACCESS

    Documents
    23 docs on file
    Reference
    15/1023
    Full record in report
  2. More recent applications — locked
  3. Change Of UseDecision
  4. ConversionDecision

+ 5 more applications in the report

Unlock 21 St Mellons Road, Marshfield, Cardiff, CF3 2TX's full planning history

You're seeing the shape of it. The report has the substance.

  • Every decision — granted, refused or withdrawn (7 on record)
  • All 8 applications on this property in full, plus 1 notable nearby
  • The 258 documents, officer reports & conditions
  • What the pattern means for extending or converting here
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On the street

Versus other St Mellons Road homes

Four headline reads against 23 similar houses on this street, drawn from the latest EPC and Land Registry data.

21 St Mellons Road outperforms the street on epc rating by a wide margin.

Price per m²

£2,982

Street avg £2,597

On par

Floor Area

166 m²

Street avg 140 m²

Above

CO₂ Emissions

2.2 t/year

Street avg 4.4 t/year

Strongly above

Years Held

3 years

Street avg 9 years

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

0.3 km

Oakfields — bus stop.

Nearest stops

  • OakfieldsBus stop283m
  • Marshfield StoresBus stop301m
  • The ShiresBus stop438m
  • Pentwyn TerraceBus stop459m

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

21st centuryDetached 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.

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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.
£520k

1 Blacktown Gardens, Marshfield

CF3 2SF

4 bed
£512k

1 Herbert Close, Marshfield

CF3 2UD

£511k

1 Cypress Crescent, St Mellons

CF3 2WL

4 bed2 bath
£552k

1 Mallards Reach, Marshfield

CF3 2NN

4 bed2 bath
£557k

1 Bayview Cottage, Wellfield Road, Marshfield

CF3 2UB

£489k

1 Cambrian Grove, Marshfield

CF3 2US

4 bed2 bath
£486k

1 Acorn Place, Castleton

CF3 2WE

£482k

1 Groes Fawr Close, Marshfield

CF3 2AH

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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 21 St Mellons Road is modelled from its 166 m² EPC floor area, its 1 recorded sale and recent sales of comparable homes in CF3 2TX. 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. 1 sale is recorded for 21 St Mellons Road. 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 St Mellons Road was lodged in October 2022 at band B and is valid until October 2032. Floor area, heating and insulation details on this page come from it.
Planning records
Planning applications are collected from local authority registers through PlanIt. 8 applications are matched to 21 St Mellons Road. 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 2TX.
Council tax band
21 St Mellons Road 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.
FAQ

Common questions

The questions buyers, sellers and homeowners most often ask about 21 St Mellons Road, Marshfield, Cardiff, CF3 2TX. Each answer is also embedded as structured data for search engines.

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