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21 Colchester Avenue, Penylan, Cardiff, CF23 9BN

Estimated value

£558,000

  • Since the 2020 sale (£430,000)+30%
  • Against CF23 9BN's recent median (£405,000)+38%

Newest record on this page: March 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
Habitable rooms
6
From EPC
Floor area
150 m²
1615 sq ft
Energy rating
D
Score 65
Council tax
Band G
Tenure
Private Rental
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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

£558,000

  • Against its 2020 sale (£430,000)+30%
  • Against CF23 9BN's recent median (£405,000)+38%

Your note and figure are shown publicly on this page.

How the estimate is made

The estimate for 21 Colchester Avenue is modelled from its 150 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in CF23 9BN. 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

    150 m² from the EPC lodged in June 2019

  • Sales of this home

    2 sales recorded, the latest in 2020

  • Recent sales in CF23 9BN

    5 sales, median £405,000 (2025–2015)

This page or the full report?

DataThis pageFull report
SalesLatest sale shown: March 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.

The latest sale landed in the post-pandemic price surge — useful context when reading the figure.

Sales timeline

  1. 30 October 2020Most recent

    £430,000

    +30.3%over 14 years

  2. 30 August 2006

    £330,000

Median price across the last 5 sales in CF23 9BN: £405,000 (2025–2015).

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 21 Colchester Avenue

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

21 Colchester Avenue is a semi-detached house in Penylan, Cardiff, Cardiff (CF23 9BN). It has a recorded floor area of 150 m² (around 1615 sq ft), construction records dating it to 1900-1929 and council tax band G. The latest certificate (June 2019) shows a D (score 65), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 79).

At 150 m² it's 15.4% larger than the typical home in the postcode (130 m² median across 13 EPCs). Across 2006–2020, sale prices on this property compounded at 1.9% per year. Today's modelled estimate of £558,000 is 29.8% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£266/sq ft) was about 25.9% above the typical sold price in the postcode. Last sale on file: £430,000 in October 2020.

Before you decide

Everything you need to know about 21 Colchester Avenue

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
Jun 2019

EPC Rating

A
B
C
D
D65
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Average
CO2 Emissions
5.7 t/year
Occupancy
Rented

Certificate validity

Valid until 16 June 2029

2 years remaining
Planning

Planning history

Applications and permits filed against 21 Colchester Avenue, Penylan, Cardiff, CF23 9BN, sourced from the PlanIt planning register.

21 Colchester Avenue has no planning applications on record.

2

But the area is active

2 notable applications nearby — larger schemes and conversions that could reshape the street. The report maps them all.

On the street

Versus other Colchester Avenue homes

Four headline reads against 10 similar houses on this street, drawn from the latest EPC and Land Registry data.

On epc rating, 21 Colchester Avenue stands well clear of the street.

Price per m²

£2,867

Street avg £2,814

On par

Floor Area

150 m²

Street avg 147 m²

On par

Habitable Rooms

6 rooms

Street avg 6 rooms

On par

CO₂ Emissions

5.7 t/year

Street avg 6.7 t/year

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

169/mo

Falling year-on-year across the wider district.

Nearest stop

0.1 km

Colchester Avenue Top — bus stop.

Nearest stops

  • Colchester Avenue TopBus stop85m
  • Colchester AvenueBus stop107m
  • Waterloo RoadBus stop110m
  • Colchester AvenueBus stop112m

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.

SDL Surveying

Get a survey for this property

Level 3 Building Survey

Victorian-eraSemi-Detached HouseEPC DPre-1919 build

Because the property was built before 1919, we believe a Level 3 building survey should be considered.

From £1,085 · 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.
£568k

1 Clos Gwrgi, Penylan

CF23 9FQ

£450k

1 Barons Court Road, Penylan

CF23 9DF

£450k

1 Colchester Avenue, Penylan

CF23 9BN

£442k

1 Earl S Court Road, Penylan

CF23 9DD

4 bed
£417k

1 Hugon Close

CF23 9BY

3 bed1 bath
£360k

1 Baber Close

CF23 9BX

£350k

1 Firstbrook Close

CF23 9ER

3 bed2 bath
£339k

1 Doe Close, Penylan

CF23 9HJ

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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 Colchester Avenue is modelled from its 150 m² EPC floor area, its 2 recorded sales and recent sales of comparable homes in CF23 9BN. 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 21 Colchester Avenue. 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 Colchester Avenue was lodged in June 2019 at band D and is valid until June 2029. Floor area, heating and insulation details on this page come from it.
Planning records
Planning applications are collected from local authority registers through PlanIt. None is matched to 21 Colchester Avenue. 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 9BN.
Council tax band
21 Colchester Avenue is in council tax band G. 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 Colchester Avenue, Penylan, Cardiff, CF23 9BN. Each answer is also embedded as structured data for search engines.

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