PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Heol Y Twyn, SWANSEA, SA4 9EU
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 Y Twyn, SA4 9EU 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 Y Twyn, SWANSEA, SA4 9EU
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Heol y Twyn, Pontlliw
Date
30 Mar 2014
Current
Potential
57
87
Property Type
House
Built Form
End-Terrace
Constructed
1967-1975
Certificate History
30 Mar 2014
57
87
22 Jul 2009
53
73
22 Jul 2009
53
73
Total Floor Area
69 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
10 Heol y Twyn, Pontlliw
Date
5 Sep 2013
Current
Potential
64
87
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
5 Sep 2013
64
87
Total Floor Area
68 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
12 HEOL Y TWYN, PONTLLIW
Date
7 Jul 2021
Current
Potential
67
83
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
7 Jul 2021
67
83
Total Floor Area
80 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
12a Heol y Twyn, Pontlliw
Date
28 Nov 2011
Current
Potential
75
76
Property Type
House
Built Form
Detached
Constructed
2003-2006
Certificate History
28 Nov 2011
75
76
Total Floor Area
122 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
16 Heol y Twyn, Pontlliw
Date
11 Mar 2009
Current
Potential
43
74
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
11 Mar 2009
43
74
Total Floor Area
68 sq m
Current CO2 Emissions Level
5.8
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
85
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
0
Address
17 Heol Y Twyn, Pontlliw
Date
30 Mar 2022
Current
Potential
70
85
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
30 Mar 2022
70
85
Total Floor Area
67 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
18 Heol Y Twyn, Pontlliw
Date
29 Jun 2024
Current
Potential
72
87
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
29 Jun 2024
72
87
Total Floor Area
68 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
18 Heol y Twyn, Pontlliw
Date
19 Apr 2011
Current
Potential
70
71
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
19 Apr 2011
70
71
Total Floor Area
67 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
19 Heol y Twyn, Pontlliw
Date
24 Feb 2011
Current
Potential
43
76
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
24 Feb 2011
43
76
Total Floor Area
69 sq m
Current CO2 Emissions Level
5.9
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
86
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
19 HEOL Y TWYN, PONTLLIW
Date
9 Jan 2021
Current
Potential
51
86
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
9 Jan 2021
51
86
Total Floor Area
68 sq m
Current CO2 Emissions Level
4.5
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
66
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
2 Heol y Twyn, Pontlliw
Date
30 Jan 2020
Current
Potential
64
89
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
30 Jan 2020
64
89
Total Floor Area
70 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
21 Heol Y Twyn, Pontlliw
Date
3 Oct 2021
Current
Potential
51
87
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
3 Oct 2021
51
87
Total Floor Area
68 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
68
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
22 Heol Y Twyn, Pontlliw
Date
1 May 2023
Current
Potential
70
88
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
1 May 2023
70
88
Total Floor Area
68 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
22 Heol y Twyn, Pontlliw
Date
9 Dec 2013
Current
Potential
67
85
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
9 Dec 2013
67
85
25 May 2010
63
78
Total Floor Area
69 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
23 Heol y Twyn, Pontlliw
Date
29 Oct 2018
Current
Potential
49
85
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
29 Oct 2018
49
85
Total Floor Area
69 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
68
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
24 Heol y Twyn, Pontlliw
Date
26 Apr 2017
Current
Potential
66
86
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
26 Apr 2017
66
86
Total Floor Area
69 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
26 Heol Y Twyn, Pontlliw
Date
14 Sep 2022
Current
Potential
73
87
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
14 Sep 2022
73
87
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
26 Heol y Twyn, Pontlliw
Date
20 Apr 2012
Current
Potential
64
86
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
20 Apr 2012
64
86
Total Floor Area
67 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
27 Heol y Twyn, Pontlliw
Date
26 Aug 2015
Current
Potential
60
86
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
26 Aug 2015
60
86
28 May 2015
57
86
16 Jul 2012
61
86
Total Floor Area
80 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
29 Heol y Twyn, Pontlliw
Date
14 Sep 2016
Current
Potential
67
82
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
14 Sep 2016
67
82
Total Floor Area
91 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
31 Heol y Twyn, Pontlliw
Date
25 Mar 2012
Current
Potential
49
71
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
25 Mar 2012
49
71
Total Floor Area
51 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
78
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
33 Heol y Twyn, Pontlliw
Date
22 Mar 2012
Current
Potential
57
70
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
22 Mar 2012
57
70
Total Floor Area
68 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
34 Heol y Twyn, Pontlliw
Date
15 Aug 2011
Current
Potential
55
71
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
15 Aug 2011
55
71
Total Floor Area
68 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
61
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
35 Heol Y Twyn, Pontlliw
Date
22 Mar 2023
Current
Potential
72
86
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
22 Mar 2023
72
86
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
35 Heol y Twyn, Pontlliw
Date
19 Oct 2012
Current
Potential
61
89
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
19 Oct 2012
61
89
26 Jan 2012
56
70
Total Floor Area
69 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
38 Heol y Twyn, Pontlliw
Date
5 Aug 2018
Current
Potential
67
87
Property Type
House
Built Form
Semi-Detached
Constructed
1976-1982
Certificate History
5 Aug 2018
67
87
Total Floor Area
78 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
4 Heol y Twyn, Pontlliw
Date
6 Jul 2011
Current
Potential
55
73
Property Type
House
Built Form
End-Terrace
Constructed
1967-1975
Certificate History
6 Jul 2011
55
73
Total Floor Area
69 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
61
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
41 Heol y Twyn, Pontlliw
Date
21 Jun 2011
Current
Potential
68
69
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
21 Jun 2011
68
69
Total Floor Area
63 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
5 Heol y Twyn, Pontlliw
Date
18 Apr 2019
Current
Potential
58
89
Property Type
House
Built Form
Semi-Detached
Constructed
1976-1982
Certificate History
18 Apr 2019
58
89
Total Floor Area
67 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
6 Heol y Twyn, Pontlliw
Date
18 May 2015
Current
Potential
70
90
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
18 May 2015
70
90
Total Floor Area
34 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
7 Heol y Twyn, Pontlliw
Date
21 Apr 2014
Current
Potential
70
88
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
21 Apr 2014
70
88
6 Feb 2012
55
69
Total Floor Area
74 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
2
Address
9 Heol y Twyn, Pontlliw
Date
9 Feb 2010
Current
Potential
68
76
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
9 Feb 2010
68
76
Total Floor Area
68 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
9 HEOL Y TWYN, PONTLLIW
Date
10 Feb 2021
Current
Potential
64
83
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
10 Feb 2021
64
83
Total Floor Area
68 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Bands
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.