PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Napier Street, MOUNTAIN ASH, CF45 3HW
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 Napier Street, CF45 3HW 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 Napier Street, MOUNTAIN ASH, CF45 3HW
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
10 Napier Street
Date
19 Feb 2014
Current
Potential
51
82
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
19 Feb 2014
51
82
12 Oct 2011
70
70
Total Floor Area
66 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
11 Napier Street
Date
4 Nov 2021
Current
Potential
56
87
Property Type
House
Built Form
End-Terrace
Constructed
before 1900
Certificate History
4 Nov 2021
56
87
19 Aug 2011
44
55
Total Floor Area
71 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
66
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
14 Napier Street
Date
14 Jun 2010
Current
Potential
67
68
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
14 Jun 2010
67
68
Total Floor Area
61 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
16 Napier Street
Date
16 May 2010
Current
Potential
70
75
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
16 May 2010
70
75
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
2 Napier Street
Date
31 May 2015
Current
Potential
54
84
Property Type
House
Built Form
End-Terrace
Constructed
before 1900
Certificate History
31 May 2015
54
84
Total Floor Area
89 sq m
Current CO2 Emissions Level
5.9
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
67
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
20 Napier Street
Date
5 Jun 2016
Current
Potential
60
93
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
5 Jun 2016
60
93
Total Floor Area
57 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
61
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
21 Napier Street
Date
5 Jun 2016
Current
Potential
64
92
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
5 Jun 2016
64
92
Total Floor Area
58 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
22 Napier Street
Date
13 Dec 2011
Current
Potential
57
69
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
13 Dec 2011
57
69
Total Floor Area
58 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
60
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
23 Napier Street
Date
13 Sep 2016
Current
Potential
54
84
Property Type
House
Built Form
End-Terrace
Constructed
before 1900
Certificate History
13 Sep 2016
54
84
21 Aug 2014
12
84
Total Floor Area
75 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
62
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
24 Napier Street
Date
21 Jul 2015
Current
Potential
69
91
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
21 Jul 2015
69
91
Total Floor Area
58 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
24 NAPIER STREET, MOUNTAIN ASH
Date
23 Nov 2020
Current
Potential
69
88
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
23 Nov 2020
69
88
Total Floor Area
59 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
27 Napier Street
Date
4 Jul 2024
Current
Potential
61
88
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
4 Jul 2024
61
88
Total Floor Area
87 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
28 Napier Street
Date
21 Sep 2023
Current
Potential
23
58
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
21 Sep 2023
23
58
Total Floor Area
53 sq m
Current CO2 Emissions Level
5.7
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
109
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
30 Napier Street
Date
9 Oct 2017
Current
Potential
65
90
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
9 Oct 2017
65
90
Total Floor Area
56 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
31 Napier Street
Date
20 May 2022
Current
Potential
69
89
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
20 May 2022
69
89
24 Feb 2014
60
91
Total Floor Area
76 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
32 Napier Street
Date
26 Feb 2014
Current
Potential
67
94
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
26 Feb 2014
67
94
Total Floor Area
56 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
33 Napier Street
Date
5 Jul 2017
Current
Potential
63
87
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
5 Jul 2017
63
87
1 Dec 2015
56
90
4 Nov 2008
59
70
Total Floor Area
86 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
33 NAPIER STREET, MOUNTAIN ASH
Date
3 Nov 2020
Current
Potential
66
85
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
3 Nov 2020
66
85
Total Floor Area
86 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
35 Napier Street
Date
2 Aug 2017
Current
Potential
57
83
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
2 Aug 2017
57
83
8 Dec 2010
55
64
Total Floor Area
78 sq m
Current CO2 Emissions Level
4.9
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
62
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
36 Napier Street
Date
3 Oct 2022
Current
Potential
73
92
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
3 Oct 2022
73
92
3 May 2012
67
91
Total Floor Area
58 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
37 Napier Street
Date
15 Jun 2022
Current
Potential
54
90
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
15 Jun 2022
54
90
29 May 2012
54
91
Total Floor Area
45 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
81
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
38 Napier Street
Date
30 Apr 2014
Current
Potential
47
91
Property Type
House
Built Form
End-Terrace
Constructed
before 1900
Certificate History
30 Apr 2014
47
91
Total Floor Area
55 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
74
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
39 Napier Street
Date
19 Jul 2011
Current
Potential
38
48
Property Type
House
Built Form
Detached
Constructed
1900-1929
Certificate History
19 Jul 2011
38
48
Total Floor Area
90 sq m
Current CO2 Emissions Level
9.9
Potential CO2 Emissions Level
8.1
CO2 per sq m per Year
75
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
4 Napier Street
Date
9 Apr 2014
Current
Potential
56
90
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
9 Apr 2014
56
90
23 Aug 2013
54
91
Total Floor Area
59 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
41 Napier Street
Date
18 Jul 2022
Current
Potential
1
85
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
18 Jul 2022
1
85
Total Floor Area
75 sq m
Current CO2 Emissions Level
12.0
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
157
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
1
Address
43 Napier Street
Date
7 Apr 2014
Current
Potential
50
88
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
7 Apr 2014
50
88
Total Floor Area
82 sq m
Current CO2 Emissions Level
5.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
61
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
45 Napier Street
Date
2 Mar 2024
Current
Potential
77
90
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
2 Mar 2024
77
90
2 Feb 2011
79
81
15 Oct 2009
50
73
Total Floor Area
73 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
47 Napier Street
Date
8 Dec 2018
Current
Potential
67
88
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
8 Dec 2018
67
88
Total Floor Area
74 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
48 Napier Street
Date
15 Nov 2009
Current
Potential
46
66
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
15 Nov 2009
46
66
Total Floor Area
61 sq m
Current CO2 Emissions Level
5.1
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
83
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
49 Napier Street
Date
30 Jun 2015
Current
Potential
50
102
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
30 Jun 2015
50
102
Total Floor Area
69 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
78
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
51 Napier Street
Date
29 Jun 2020
Current
Potential
59
78
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
29 Jun 2020
59
78
Total Floor Area
62 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
59
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
54 Napier Street
Date
26 Aug 2014
Current
Potential
33
78
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
26 Aug 2014
33
78
Total Floor Area
77 sq m
Current CO2 Emissions Level
6.6
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
86
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
55 Napier Street
Date
15 Feb 2024
Current
Potential
66
81
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
15 Feb 2024
66
81
Total Floor Area
77 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
57 Napier Street
Date
14 Nov 2018
Current
Potential
57
85
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
14 Nov 2018
57
85
28 Apr 2016
58
82
Total Floor Area
66 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
6 Napier Street
Date
6 Mar 2020
Current
Potential
72
92
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
6 Mar 2020
72
92
23 Feb 2009
62
75
Total Floor Area
57 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
8 Napier Street
Date
14 Aug 2016
Current
Potential
69
92
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
14 Aug 2016
69
92
Total Floor Area
56 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
3
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.