PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Heol Islwyn, SWANSEA, SA4 4LJ

Introduction

Energy Performance Certificates (EPCs) are designed to tell you how efficient a building is and provides a rating between A (very efficient) and G which is inefficient. It helps to identify how costly it will be to light and heat a property and what the carbon dioxide emissions are likely to be.

An EPC needs to be provided as part of the process of selling or renting a house and should be availale as soon as the property is marketed. An EPC may only be produced by an approved domestic energy assessor and each certificate is valid for 10 years.

Additionally, an EPC will highlight potential efficiency improvements that could be made to the property, an estimated cost for implementation and the likely savings that can be made as a result. These costs and savings are for a typical household in that property and not specific to you or your family.

Certificates issued for Heol Islwyn, SA4 4LJ are shown below and the data are updated monthly for England and Wales and quarterly for properties in Scotland.

Data are provided by the Department for Levelling Up, Housing and Communities.

Energy Performance Certificates Generated for Heol Islwyn, SWANSEA, SA4 4LJ
Period Covered: 2008 - 31 October 2024

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
10 Heol Islwyn, Gorseinon
Date
25 Feb 2010
Current
Potential
65
77
Property Type
House
Built Form
Semi-Detached
Constructed
1976-1982
+
Certificate History
25 Feb 2010
65
77
Total Floor Area
79 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
11 Heol Islwyn, Gorseinon
Date
5 Jul 2022
Current
Potential
76
91
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
+
Certificate History
5 Jul 2022
76
91
2 Feb 2022
70
91
22 Jul 2019
65
85
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
13 Heol Islwyn, Gorseinon
Date
4 Jan 2024
Current
Potential
71
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1976-1982
+
Certificate History
4 Jan 2024
71
87
25 Feb 2010
67
81
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
15 HEOL ISLWYN, GORSEINON
Date
15 Apr 2021
Current
Potential
67
83
Property Type
House
Built Form
End-Terrace
Constructed
1967-1975
+
Certificate History
15 Apr 2021
67
83
Total Floor Area
68 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
17 Heol Islwyn, Gorseinon
Date
8 Nov 2024
Current
Potential
72
86
Property Type
House
Built Form
End-Terrace
Constructed
1983-1990
+
Certificate History
8 Nov 2024
72
86
8 Oct 2009
68
77
Total Floor Area
71 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
19 Heol Islwyn, Gorseinon
Date
8 Jun 2016
Current
Potential
71
90
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
+
Certificate History
8 Jun 2016
71
90
Total Floor Area
69 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
21 Heol Islwyn, Gorseinon
Date
23 Jun 2020
Current
Potential
67
89
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
+
Certificate History
23 Jun 2020
67
89
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
25 Heol Islwyn, Gorseinon
Date
17 Jul 2024
Current
Potential
73
87
Property Type
House
Built Form
End-Terrace
Constructed
1983-1990
+
Certificate History
17 Jul 2024
73
87
27 Feb 2013
68
86
Total Floor Area
68 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
27 Heol Islwyn, Gorseinon
Date
14 Jan 2009
Current
Potential
67
77
Property Type
House
Built Form
Mid-Terrace
Constructed
1991-1995
+
Certificate History
14 Jan 2009
67
77
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
27 HEOL ISLWYN, GORSEINON
Date
24 Sep 2020
Current
Potential
72
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
+
Certificate History
24 Sep 2020
72
87
Total Floor Area
69 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
29 Heol Islwyn, Gorseinon
Date
8 Mar 2012
Current
Potential
67
75
Property Type
House
Built Form
Mid-Terrace
Constructed
1991-1995
+
Certificate History
8 Mar 2012
67
75
7 Oct 2008
67
78
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
3 Heol Islwyn, Gorseinon
Date
23 May 2010
Current
Potential
69
81
Property Type
House
Built Form
Mid-Terrace
Constructed
1976-1982
+
Certificate History
23 May 2010
69
81
27 Oct 2009
76
80
Total Floor Area
67 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
31 Heol Islwyn, Gorseinon
Date
14 Oct 2008
Current
Potential
61
75
Property Type
House
Built Form
End-Terrace
Constructed
1983-1990
+
Certificate History
14 Oct 2008
61
75
Total Floor Area
67 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
39 Heol Islwyn, Gorseinon
Date
3 May 2010
Current
Potential
55
71
Property Type
House
Built Form
Semi-Detached
Constructed
1976-1982
+
Certificate History
3 May 2010
55
71
Total Floor Area
81 sq m
Current CO2 Emissions Level
4.9
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
61
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
4 Heol Islwyn, Gorseinon
Date
29 Mar 2014
Current
Potential
46
87
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
29 Mar 2014
46
87
4 Mar 2013
50
83
15 Feb 2013
61
87
28 Nov 2008
53
72
Total Floor Area
84 sq m
Current CO2 Emissions Level
5.6
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
67
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
41 Heol Islwyn, Gorseinon
Date
4 Sep 2013
Current
Potential
60
86
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
4 Sep 2013
60
86
Total Floor Area
80 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
8 Heol Islwyn, Gorseinon
Date
16 Aug 2010
Current
Potential
56
73
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
16 Aug 2010
56
73
Total Floor Area
99 sq m
Current CO2 Emissions Level
5.5
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Bands

A
92 - 100
B
81 - 91
C
69 - 80
D
55 -68
E
39 -54
F
54 -38
G
0 - 20

Energy Performance Certificate Notes

There are a number of reasons that certificates are excluded from the dataset;

  • The holder of the energy certificate has 'opted-out' of disclosure
  • The certificate is excluded on the grounds of national security
  • Certificates that are marked as 'cancelled' or 'not for issue'

Certificates are grouped together by the property reference identifier rather than the postal address with a view to showing the history of changes made to properties over time. Sometimes, one property may exist as multiple entries in the table instead and this is as a result of inconsistent building references being used on each prepared certificate.

Contains public sector information licensed under the Open Government Licence v3.0.
Contains Royal Mail data © Royal Mail copyright and Database right 2025.