PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Onslow Gardens, LONDON, SW7 3AL
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 Onslow Gardens, SW7 3AL 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 Onslow Gardens, LONDON, SW7 3AL
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
21a Onslow Gardens
Date
25 Mar 2015
Current
Potential
61
78
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
before 1900
Certificate History
25 Mar 2015
61
78
Total Floor Area
38 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
1
Number of Extensions
0
Address
23 Onslow Gardens
Date
20 Jul 2022
Current
Potential
61
79
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
20 Jul 2022
61
79
16 Jul 2012
66
78
Total Floor Area
624 sq m
Current CO2 Emissions Level
21.0
Potential CO2 Emissions Level
10.6
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
12
Number of Extensions
2
Address
Flat 1, 18 Onslow Gardens
Date
23 Feb 2016
Current
Potential
73
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
23 Feb 2016
73
78
10 Feb 2012
64
71
11 Nov 2011
57
65
10 Nov 2011
57
65
Total Floor Area
82 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 1, 19 Onslow Gardens
Date
3 Oct 2022
Current
Potential
68
79
Property Type
Maisonette
Built Form
Enclosed Mid-Terrace
Constructed
before 1900
Certificate History
3 Oct 2022
68
79
23 Oct 2013
71
83
Total Floor Area
92 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 1, 24 Onslow Gardens
Date
24 Jun 2020
Current
Potential
60
77
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
24 Jun 2020
60
77
6 Jul 2010
77
80
Total Floor Area
66 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
Flat 1/2, 21 Onslow Gardens
Date
3 Jul 2023
Current
Potential
72
82
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
3 Jul 2023
72
82
Total Floor Area
181 sq m
Current CO2 Emissions Level
4.9
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
3
Address
Flat 11, 21 Onslow Gardens
Date
21 Sep 2023
Current
Potential
56
79
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
21 Sep 2023
56
79
22 Mar 2013
47
75
Total Floor Area
94 sq m
Current CO2 Emissions Level
4.8
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 12, 21 Onslow Gardens
Date
7 Feb 2022
Current
Potential
60
81
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
7 Feb 2022
60
81
16 May 2011
49
58
Total Floor Area
89 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 2, 18 Onlsow Gardens
Date
18 Jul 2018
Current
Potential
68
80
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
18 Jul 2018
68
80
11 Feb 2009
48
57
Total Floor Area
117 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 2, 19 Onslow Gardens
Date
2 Mar 2012
Current
Potential
35
36
Property Type
Flat
Built Form
N/A
Constructed
before 1900
Certificate History
2 Mar 2012
35
36
Total Floor Area
120 sq m
Current CO2 Emissions Level
9.2
Potential CO2 Emissions Level
9.1
CO2 per sq m per Year
77
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 2, 20 Onslow Gardens
Date
15 May 2014
Current
Potential
40
72
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
15 May 2014
40
72
Total Floor Area
120 sq m
Current CO2 Emissions Level
8.3
Potential CO2 Emissions Level
3.5
CO2 per sq m per Year
69
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 2, 21 Onslow Gardens
Date
13 Dec 2013
Current
Potential
49
74
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
13 Dec 2013
49
74
Total Floor Area
174 sq m
Current CO2 Emissions Level
9.3
Potential CO2 Emissions Level
4.5
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
Flat 2, 24 Onslow Gardens
Date
4 Sep 2016
Current
Potential
62
79
Property Type
Flat
Built Form
End-Terrace
Constructed
before 1900
Certificate History
4 Sep 2016
62
79
10 Oct 2008
61
68
Total Floor Area
80 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 3, 19 Onslow Gardens
Date
21 Jul 2019
Current
Potential
62
72
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
21 Jul 2019
62
72
1 Apr 2009
61
69
Total Floor Area
57 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 3, 21 Onslow Gardens
Date
3 Nov 2008
Current
Potential
69
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
3 Nov 2008
69
77
Total Floor Area
87 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 3, 24 Onslow Gardens
Date
25 Apr 2023
Current
Potential
55
78
Property Type
Flat
Built Form
End-Terrace
Constructed
before 1900
Certificate History
25 Apr 2023
55
78
19 Mar 2013
59
75
Total Floor Area
87 sq m
Current CO2 Emissions Level
4.5
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
Flat 4, 18 Onslow Gardens
Date
25 Jan 2022
Current
Potential
68
75
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
25 Jan 2022
68
75
12 Jun 2011
65
66
4 Jun 2009
67
76
Total Floor Area
56 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 4, 19 Onslow Gardens
Date
19 Dec 2011
Current
Potential
61
62
Property Type
Flat
Built Form
N/A
Constructed
before 1900
Certificate History
19 Dec 2011
61
62
11 Dec 2009
80
85
Total Floor Area
58 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 4, 21 Onslow Gardens
Date
3 Aug 2015
Current
Potential
62
77
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
3 Aug 2015
62
77
2 Aug 2015
66
78
Total Floor Area
100 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 4, 24 Onslow Garden
Date
23 Jan 2024
Current
Potential
58
79
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
23 Jan 2024
58
79
Total Floor Area
38 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
89
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
Flat 5, 18 Onslow Gardens
Date
18 Apr 2023
Current
Potential
69
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
18 Apr 2023
69
80
1 Oct 2009
79
80
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 5, 21 Onslow Gardens
Date
2 Apr 2019
Current
Potential
59
76
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
2 Apr 2019
59
76
Total Floor Area
156 sq m
Current CO2 Emissions Level
6.5
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
Flat 6, 18 Onslow Gardens
Date
11 Mar 2015
Current
Potential
53
61
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
11 Mar 2015
53
61
Total Floor Area
63 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
61
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 6, 21 Onslow Gardens
Date
5 Sep 2019
Current
Potential
75
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
5 Sep 2019
75
80
7 Nov 2008
68
74
Total Floor Area
99 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
25
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 7, 21 Onslow Gardens
Date
12 Jul 2022
Current
Potential
79
83
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
12 Jul 2022
79
83
23 Oct 2011
64
66
Total Floor Area
131 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
20
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
Flat 8, 21 Onslow Gardens
Date
15 Jan 2020
Current
Potential
71
81
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
15 Jan 2020
71
81
20 Oct 2009
66
75
Total Floor Area
55 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 8, 24 Onslow Gardens
Date
9 May 2011
Current
Potential
61
73
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
9 May 2011
61
73
Total Floor Area
36 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 9, 21 Onslow Gardens
Date
14 Jul 2010
Current
Potential
70
72
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
14 Jul 2010
70
72
Total Floor Area
64 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
2
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.