PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Heol Williams, CARDIFF, CF3 6AQ
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 Williams, CF3 6AQ 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 Williams, CARDIFF, CF3 6AQ
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Heol Williams, Old St. Mellons
Date
15 Jul 2019
Current
Potential
83
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
15 Jul 2019
83
93
Total Floor Area
113 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
10 Heol Williams, Old St. Mellons
Date
22 Aug 2019
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
22 Aug 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
11 Heol Williams, Old St. Mellons
Date
14 Nov 2018
Current
Potential
81
97
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
14 Nov 2018
81
97
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
19
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
12 Heol Williams, Old St. Mellons
Date
24 Sep 2019
Current
Potential
82
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
24 Sep 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
13 Heol Williams, Old St. Mellons
Date
14 Nov 2018
Current
Potential
81
97
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
14 Nov 2018
81
97
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
19
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
14 Heol Williams, Old St. Mellons
Date
27 Feb 2020
Current
Potential
83
94
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
27 Feb 2020
83
94
Total Floor Area
99 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
15 Heol Williams, Old St. Mellons
Date
14 Nov 2018
Current
Potential
82
98
Property Type
House
Built Form
Mid-Terrace
Constructed
N/A
Certificate History
14 Nov 2018
82
98
Total Floor Area
51 sq m
Current CO2 Emissions Level
0.9
Potential CO2 Emissions Level
-0.3
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
16 Heol Williams, Old St. Mellons
Date
4 Sep 2019
Current
Potential
83
94
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
4 Sep 2019
83
94
Total Floor Area
99 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
17 Heol Williams, Old St. Mellons
Date
14 Nov 2018
Current
Potential
81
97
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
14 Nov 2018
81
97
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
19
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
18 Heol Williams, Old St. Mellons
Date
1 Nov 2019
Current
Potential
83
94
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
1 Nov 2019
83
94
Total Floor Area
99 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
19 Heol Williams, Old St. Mellons
Date
16 Nov 2018
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
16 Nov 2018
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
2 Heol Williams, Old St. Mellons
Date
14 Sep 2020
Current
Potential
83
94
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
14 Sep 2020
83
94
Total Floor Area
99 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
20 Heol Williams, Old St. Mellons
Date
1 Nov 2019
Current
Potential
83
94
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
1 Nov 2019
83
94
Total Floor Area
99 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
21 Heol Williams, Old St. Mellons
Date
12 Dec 2018
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
12 Dec 2018
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
22 Heol Williams, Old St. Mellons
Date
30 May 2019
Current
Potential
82
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
30 May 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
23 Heol Williams, Old St. Mellons
Date
11 Oct 2018
Current
Potential
84
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
11 Oct 2018
84
95
Total Floor Area
94 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
24 Heol Williams, Old St. Mellons
Date
30 May 2019
Current
Potential
82
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
30 May 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
25 Heol Williams, Old St. Mellons
Date
3 Oct 2019
Current
Potential
85
96
Property Type
House
Built Form
Mid-Terrace
Constructed
N/A
Certificate History
3 Oct 2019
85
96
Total Floor Area
94 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
26 Heol Williams, Old St. Mellons
Date
3 Jun 2019
Current
Potential
82
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
3 Jun 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
27 Heol Williams, Old St. Mellons
Date
4 Sep 2019
Current
Potential
84
94
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
4 Sep 2019
84
94
Total Floor Area
94 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
28 Heol Williams, Old St. Mellons
Date
8 Nov 2019
Current
Potential
82
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
8 Nov 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
29 Heol Williams, Old St. Mellons
Date
11 Oct 2018
Current
Potential
81
96
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
11 Oct 2018
81
96
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
19
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
3 Heol Williams, Old St. Mellons
Date
19 May 2019
Current
Potential
82
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
19 May 2019
82
93
Total Floor Area
90 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
30 Heol Williams, Old St. Mellons
Date
2 Jun 2019
Current
Potential
84
94
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
2 Jun 2019
84
94
Total Floor Area
99 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
31 Heol Williams, Old St. Mellons
Date
16 Nov 2018
Current
Potential
81
97
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
16 Nov 2018
81
97
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
19
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
32 Heol Williams, Old St. Mellons
Date
2 Jun 2019
Current
Potential
84
94
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
2 Jun 2019
84
94
Total Floor Area
99 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
33 Heol Williams, Old St. Mellons
Date
16 Nov 2018
Current
Potential
82
96
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
16 Nov 2018
82
96
Total Floor Area
58 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.1
CO2 per sq m per Year
18
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
34 Heol Williams, Old St. Mellons
Date
30 Sep 2019
Current
Potential
83
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
30 Sep 2019
83
93
Total Floor Area
113 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
35 Heol Williams, Old St. Mellons
Date
16 Nov 2018
Current
Potential
82
96
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
16 Nov 2018
82
96
Total Floor Area
58 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.1
CO2 per sq m per Year
18
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
36 Heol Williams, Old St. Mellons
Date
15 Jan 2020
Current
Potential
83
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
15 Jan 2020
83
93
Total Floor Area
113 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
37 Heol Williams, Old St. Mellons
Date
27 Sep 2018
Current
Potential
81
97
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
27 Sep 2018
81
97
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
19
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
38 Heol Williams, Old St. Mellons
Date
17 Oct 2019
Current
Potential
82
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
17 Oct 2019
82
93
Total Floor Area
93 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
39 Heol Williams, Old St. Mellons
Date
16 Nov 2018
Current
Potential
81
97
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
16 Nov 2018
81
97
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
19
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
4 Heol Williams, Old St. Mellons
Date
16 Aug 2020
Current
Potential
83
94
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
16 Aug 2020
83
94
Total Floor Area
99 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
40 Heol Williams, Old St. Mellons
Date
3 Apr 2019
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
3 Apr 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
41 Heol Williams, Old St. Mellons
Date
16 Nov 2018
Current
Potential
84
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
16 Nov 2018
84
95
Total Floor Area
94 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
42 Heol Williams, Old St. Mellons
Date
3 Apr 2019
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
3 Apr 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
43 Heol Williams, Old St. Mellons
Date
16 Nov 2018
Current
Potential
84
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
16 Nov 2018
84
95
Total Floor Area
94 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
44 Heol Williams, Old St. Mellons
Date
16 Jul 2019
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
16 Jul 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
45 Heol Williams, Old St. Mellons
Date
27 Sep 2018
Current
Potential
82
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
27 Sep 2018
82
93
Total Floor Area
93 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
46 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
13 Dec 2018
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
48 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
13 Dec 2018
82
95
Total Floor Area
69 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
5 Heol Williams, Old St. Mellons
Date
7 Dec 2018
Current
Potential
82
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
7 Dec 2018
82
93
Total Floor Area
90 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
50 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
84
97
Property Type
House
Built Form
Mid-Terrace
Constructed
N/A
Certificate History
13 Dec 2018
84
97
Total Floor Area
69 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
52 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
13 Dec 2018
82
95
Total Floor Area
69 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
54 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
84
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
13 Dec 2018
84
95
Total Floor Area
94 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
56 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
84
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
13 Dec 2018
84
95
Total Floor Area
94 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
58 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
82
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
13 Dec 2018
82
93
Total Floor Area
90 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
6 Heol Williams, Old St. Mellons
Date
22 Aug 2019
Current
Potential
82
95
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
22 Aug 2019
82
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
60 Heol Williams, Old St. Mellons
Date
4 Sep 2019
Current
Potential
82
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
4 Sep 2019
82
93
Total Floor Area
93 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
62 Heol Williams, Old St. Mellons
Date
17 Jul 2019
Current
Potential
82
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
17 Jul 2019
82
93
Total Floor Area
93 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
64 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
82
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
13 Dec 2018
82
93
Total Floor Area
90 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
66 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
83
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
13 Dec 2018
83
93
Total Floor Area
102 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
16
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
68 Heol Williams, Old St. Mellons
Date
13 Dec 2018
Current
Potential
83
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
13 Dec 2018
83
93
Total Floor Area
102 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
16
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
7 Heol Williams, Old St. Mellons
Date
14 Nov 2018
Current
Potential
81
96
Property Type
House
Built Form
End-Terrace
Constructed
N/A
Certificate History
14 Nov 2018
81
96
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.2
CO2 per sq m per Year
19
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
70 Heol Williams, Old St. Mellons
Date
17 Jun 2019
Current
Potential
83
93
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
17 Jun 2019
83
93
Total Floor Area
113 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
8 Heol Williams, Old St. Mellons
Date
24 Sep 2019
Current
Potential
83
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
24 Sep 2019
83
95
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
9 Heol Williams, Old St. Mellons
Date
22 Nov 2018
Current
Potential
82
98
Property Type
House
Built Form
Mid-Terrace
Constructed
N/A
Certificate History
22 Nov 2018
82
98
Total Floor Area
51 sq m
Current CO2 Emissions Level
0.9
Potential CO2 Emissions Level
-0.3
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
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 2026.