Skip to content
UK Property Looker

21 Colwyn Avenue, Winch Wen, Swansea, SA1 7EE

Property type
Semi-detached
Habitable rooms
3
From EPC
Floor area
80 m²
861 sq ft
Energy rating
D
Score 66
Council tax
Band A
Tenure
Owner Occupied
Overview

About 21 Colwyn Avenue

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

21 Colwyn Avenue is a semi-detached house in Winch Wen, Swansea, Swansea (SA1 7EE). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (October 2025) shows a D (score 66), on the cusp of jumping into the C band. When first surveyed in May 2013 the rating was E, the property has climbed 1 band since. Between certificates, roof efficiency went from Very Poor to Average, hot-water efficiency went from Poor to Good and lighting went from Average to Good; while wall efficiency dropped from Good to Poor and window efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 78).

Before you decide

Everything you need to know about 21 Colwyn Avenue

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

Larger development activity nearby

Pick your report · every report is £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
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)
Oct 2025

EPC Rating

A
B
C
D
D66
E
F
G
Main Heating
Gas
Main Fuel
Gas
Hot Water
Good
Windows
Poor
CO2 Emissions
2.9 t/year
Occupancy
Owner Occupied

Property Improvements

Changes detected from historical EPC data

Oct 2025from May 2013
EPC improved fromE47toD66
Heating Controls
Prog + StatFull

Heating controls upgraded for better temperature management

Hot Water
Main (No Stat)Main System

Hot water system upgraded

Roof Insulation
UninsulatedInsulated

Roof insulation improved

Low Energy Lighting
36%100%

More low energy lighting installed

SDL Surveying

Get a survey for this property

Level 2 HomeBuyer Report

Mid 20th centurySemi-Detached HouseEPC D

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 £495 · Includes VAT

Planning

Planning history

Applications and permits filed against 21 Colwyn Avenue, Winch Wen, Swansea, SA1 7EE, sourced from the PlanIt planning register.

21 Colwyn Avenue has no planning applications on record.

3

But the area is active

3 notable applications 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.

21 Colwyn Avenue has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.

Current estimate

£150,000

Modelled from EPC, postcode comparables.

See how we calculated this

No sales recorded with HM Land Registry

That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.

Median price across the last 5 sales in SA1 7EE: £120,000 (2025–2021).

On the street

Versus other Colwyn Avenue homes

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

EPC Rating for 21 Colwyn Avenue lags the street by a wide margin.

EPC Rating

66 (D)

Street avg 69 (D)

Strongly below

Floor Area

80 m²

Street avg 75 m²

Strongly above

CO₂ Emissions

2.9 t/year

Street avg 2.6 t/year

Below

Habitable Rooms

3 rooms

Street avg 4 rooms

Below
Before you decide

Everything you need to know about 21 Colwyn Avenue

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

Larger development activity nearby

Pick your report · every report is £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.
£148k

1 Bryn Morfa, Winch Wen

SA1 7LH

2 bed1 bath
£144k

1 Aeron Place, Bonymaen

SA1 7BY

£141k

1 Buckingham Road, Bonymaen

SA1 7AL

£138k

1 Carreg Cennen Gardens, Bonymaen

SA1 7DJ

£138k

1 Dartford Drive, Bonymaen

SA1 7DU

£165k

1 Bronllan, Winch Wen

SA1 7EQ

2 bed1 bath
£136k

1 Carew Place, Winch Wen

SA1 7DX

£134k

1 Caerphilly Avenue, Bonymaen

SA1 7HY

Area

The neighbourhood at a glance

A condensed read of the local area. Each tile links through to the full breakdown on the Swansea district page.
Full Swansea report

Crime

3/mo

Steady year-on-year across the wider district.

Nearest stop

0.3 km

Carmel Road — 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 21 Colwyn Avenue, Winch Wen, Swansea, SA1 7EE. Each answer is also embedded as structured data for search engines.