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PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Heol Gwili, LLANELLI, SA14 9HF

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 Gwili, SA14 9HF 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 Gwili, LLANELLI, SA14 9HF
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
13 Heol Gwili
Date
8 Jan 2025
Current
Potential
74
86
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
+
Certificate History
8 Jan 2025
74
86
Total Floor Area
88 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
28
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
11 Heol Gwili
Date
13 Nov 2015
Current
Potential
76
77
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
13 Nov 2015
76
77
20 May 2010
38
58
Total Floor Area
85 sq m
Current CO2 Emissions Level
0.7
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
8
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
13 Heol Gwili
Date
20 Mar 2012
Current
Potential
50
63
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
20 Mar 2012
50
63
Total Floor Area
88 sq m
Current CO2 Emissions Level
5.7
Potential CO2 Emissions Level
4.0
CO2 per sq m per Year
64
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
14 Heol Gwili
Date
12 Nov 2015
Current
Potential
88
94
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
12 Nov 2015
88
94
29 Nov 2009
57
73
Total Floor Area
108 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
16
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
15 Heol Gwili
Date
26 Sep 2011
Current
Potential
65
73
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
26 Sep 2011
65
73
12 Feb 2010
62
73
Total Floor Area
96 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
17 Heol Gwili
Date
10 Feb 2017
Current
Potential
58
80
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
10 Feb 2017
58
80
Total Floor Area
73 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
19 Heol Gwili
Date
2 Jan 2014
Current
Potential
49
88
Property Type
House
Built Form
Semi-Detached
Constructed
1930-1949
+
Certificate History
2 Jan 2014
49
88
Total Floor Area
69 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
66
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
21 Heol Gwili
Date
28 Jan 2019
Current
Potential
69
85
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
28 Jan 2019
69
85
3 Feb 2013
68
85
Total Floor Area
89 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
29 Heol Gwili
Date
12 Jul 2023
Current
Potential
65
79
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
12 Jul 2023
65
79
Total Floor Area
85 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
31 Heol Gwili
Date
23 Mar 2023
Current
Potential
64
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
+
Certificate History
23 Mar 2023
64
85
4 May 2011
61
71
Total Floor Area
96 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
33 Heol Gwili
Date
18 Apr 2016
Current
Potential
67
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
+
Certificate History
18 Apr 2016
67
87
16 Mar 2016
66
86
5 Mar 2010
66
77
Total Floor Area
84 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
35 Heol Gwili
Date
16 Aug 2009
Current
Potential
36
75
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
16 Aug 2009
36
75
Total Floor Area
88 sq m
Current CO2 Emissions Level
7.3
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
83
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
37 Heol Gwili
Date
29 Jun 2023
Current
Potential
68
83
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
29 Jun 2023
68
83
Total Floor Area
89 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
39 Heol Gwili
Date
12 Jul 2023
Current
Potential
70
83
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
12 Jul 2023
70
83
Total Floor Area
89 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
4 Heol Gwili
Date
28 Feb 2019
Current
Potential
49
85
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
28 Feb 2019
49
85
Total Floor Area
89 sq m
Current CO2 Emissions Level
6.0
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
67
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
6 Heol Gwili
Date
21 Sep 2009
Current
Potential
49
76
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
21 Sep 2009
49
76
Total Floor Area
69 sq m
Current CO2 Emissions Level
5.2
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
75
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
7 Heol Gwili
Date
25 Jul 2023
Current
Potential
68
83
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
25 Jul 2023
68
83
Total Floor Area
69 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
8 Heol Gwili
Date
25 Jul 2023
Current
Potential
72
86
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
25 Jul 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
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.