What type of property is 20 Granville Avenue, CF5 1BW?

20 Granville Avenue, CF5 1BW is a 3-bedroom semi-detached house, which has been extended.

What did 20 Granville Avenue, CF5 1BW sell for?

20 Granville Avenue, CF5 1BW last sold for £339,950 in May 2015, around 11 years ago. Before that, it sold for £242,500 in September 2011, so prices have been rising over 4 years on record. Source: HM Land Registry.

What is the price history for 20 Granville Avenue, CF5 1BW?

Across 2 sales between September 2011 and May 2015, 20 Granville Avenue, CF5 1BW rose from £242,500 to £339,950, a change of £97,450. That works out to roughly +9.6% per year compounded over 4 years. Source: HM Land Registry.

How energy efficient is 20 Granville Avenue, CF5 1BW?

The current EPC rating for 20 Granville Avenue, CF5 1BW is D with a score of 66 out of 100, lodged in January 2023. The assessor estimates the property could reach a C. Source: EPC Register.

What is the floor area of 20 Granville Avenue, CF5 1BW?

20 Granville Avenue, CF5 1BW has a recorded floor area of 111 m² (1,195 sq ft), around 37 m² per bedroom. That makes it about 9% larger than the median EPC-recorded property in CF5 1BW. Source: EPC Register.

How is 20 Granville Avenue, CF5 1BW heated?

The latest EPC at 20 Granville Avenue, CF5 1BW records mains gas as the main heating fuel. Source: EPC Register.

Has 20 Granville Avenue, CF5 1BW had any planning applications?

20 Granville Avenue, CF5 1BW has an active planning application for single-storey side and rear extension (ref. 25/02374/HSE), filed in October 2025 by James King Architects, currently awaiting a decision. Source: PlanIt planning register.

What council tax band is 20 Granville Avenue, CF5 1BW?

20 Granville Avenue, CF5 1BW is in council tax band F. That sits towards the upper end of the band ladder, typically reflecting larger or higher-value homes.

Where is 20 Granville Avenue, CF5 1BW located?

20 Granville Avenue, CF5 1BW sits in Cardiff. It falls within the CF5 postcode district.

Is 20 Granville Avenue, CF5 1BW in a safe area?

Police records around 20 Granville Avenue, CF5 1BW show an average of 6 reported crimes per month over the last 9 months. Violent crime makes up roughly 45% of reports, the most common category. The overall trend is broadly stable. Source: Police UK.

How well connected is 20 Granville Avenue, CF5 1BW?

The closest bus stop to 20 Granville Avenue, CF5 1BW is The Insole, 251m away. The nearest rail option is Waun-gron Park, 587m away.

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20 Granville Avenue, Cardiff, CF5 1BW

1 planning record

Property type

Semi-detached

Bedrooms

Bathroom

Floor area

111 m²

1195 sq ft

Energy rating

Score 66

Council tax

Band F

Tenure

Owner Occupied

Overview

About 20 Granville Avenue

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

20 Granville Avenue is a three-bedroom semi-detached house in Cardiff (CF5 1BW). It has a recorded floor area of 111 m² (around 1195 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (January 2023) shows a D (score 66), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since July 2011. Between certificates, lighting went from Average to Very Good; while wall efficiency dropped from Good to Average and roof efficiency dropped from Very Good to Average. The recommended improvements would push it to C (score 78). Records show the property has been extended at some point in its history.

One planning application is currently pending a decision in 2025. Across 2011–2015, sale prices on this property compounded at 9.6% per year. Today's modelled estimate of £521,000 sits 53.3% above the 2015 sale of £339,950. On a £-per-square-foot basis, the last sale (£285/sq ft) was about 27.7% above the typical sold price in the postcode. Last sold in May 2015, so it's been off the market for around 11 years.

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

Outside

Private gardenRear
GarageSingle

Building

Previously extendedYes
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)

Jan 2023

EPC Rating

D66

Main Heating

Gas

Main Fuel

Gas

Hot Water

Good

Windows

Average

CO2 Emissions

3.8 t/year

Occupancy

Owner Occupied

Property Improvements

Changes detected from historical EPC data

Jan 2023from Jul 2011

Hot Water

SolarMain System

Hot water system changed

Low Energy Lighting

44%93%

More low energy lighting installed

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Mid 20th centurySemi-Detached HouseEPC D

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Planning

Planning history

Applications and permits filed against 20 Granville Avenue, Cardiff, CF5 1BW, sourced from the PlanIt planning register.

An application for a loft conversion is currently awaiting a decision.

1 application on record at 20 Granville Avenue, Cardiff, CF5 1BW

1 live now

0decisions1extensions8documents2nearby

Oct 2025
Loft ConversionFull
Outcome in report
Extension: Single storey · Side and rear of property
Demolition of existing rear extension and garage/ store. New single storey wrap around side and rear extension with hip to gable loft conversion with rear dormer.
Extension
Documents
8 docs on file
Reference
25/02374/HSE
Full record in report

Unlock 20 Granville Avenue, Cardiff, CF5 1BW's full planning history

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Every decision — granted, refused or withdrawn
All 1 application on this property in full, plus 2 notable nearby
The 8 documents, officer reports & conditions
What the pattern means for extending or converting here

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Price

Sales history & valuation

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

20 Granville Avenue valuation sits well clear of the typical sold price in this postcode.

Current estimate

£521,000

Modelled from EPC, postcode comparables and a sale-price growth of 9.6% per year over 4 years.

See how we calculated this

Last sold (2015)

£339,950

Growth on file: 9.6% per year over 4 years.

Sales timeline

28 May 2015Most recent
£339,950
+40.2%over 3 years
14 September 2011
£242,500

Median price across the last 5 sales in CF5 1BW: £470,000 (2025–2016).

Nearby sales in CF5 1BW

On the street

Versus other Granville Avenue homes

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

On co₂ emissions, 20 Granville Avenue stands well clear of the street.

Price per m²

£3,063

Street avg £2,969

Above

Floor Area

111 m²

Street avg 109 m²

Above

Habitable Rooms

5 rooms

Street avg 5 rooms

Below

CO₂ Emissions

3.8 t/year

Street avg 5.0 t/year

Strongly above

Before you decide

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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.

£547k

1 Butleigh Avenue

CF5 1BX

3 bed1 bath

£423k

1 Egerton Street

CF5 1RF

3 bed2 bath

£411k

1 Burlington Terrace

CF5 1GG

3 bed1 bath

£402k

1 Bernard Avenue, Canton

CF5 1BT

3 bed1 bath

£394k

1 Egerton Mews, Egerton Street

CF5 1RF

3 bed2 bath

£378k

1 Birchfield Crescent

CF5 1AE

3 bed1 bath

£378k

1 Cumberland Street

CF5 1LT

3 bed1 bath

£352k

1 Conybeare Road

CF5 1GB

3 bed1 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

Rail-style transport is unusually close for this postcode.

Crime

6/mo

Steady year-on-year across the wider district.

Nearest stop

0.3 km

The Insole — 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 20 Granville Avenue, Cardiff, CF5 1BW. Each answer is also embedded as structured data for search engines.