PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Derwent Close, AMERSHAM, HP7 9PG
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 Derwent Close, HP7 9PG 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 Derwent Close, AMERSHAM, HP7 9PG
Period Covered:
2008 - 31 October 2024
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
10 DERWENT CLOSE
Date
2 Jun 2021
Current
Potential
50
75
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
2 Jun 2021
50
75
Total Floor Area
66 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
56
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
1
Address
10 Derwent Close
Date
20 Sep 2010
Current
Potential
45
57
Property Type
Maisonette
Built Form
N/A
Constructed
1976-1982
Certificate History
20 Sep 2010
45
57
Total Floor Area
73 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
4.9
CO2 per sq m per Year
84
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
11 Derwent Close
Date
29 Mar 2022
Current
Potential
71
76
Property Type
Maisonette
Built Form
End-Terrace
Constructed
1991-1995
Certificate History
29 Mar 2022
71
76
Total Floor Area
42 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
71
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
12 Derwent Close
Date
3 Sep 2017
Current
Potential
68
79
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
3 Sep 2017
68
79
7 Nov 2008
78
82
Total Floor Area
60 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
53
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
13 Derwent Close
Date
5 Sep 2022
Current
Potential
73
82
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
5 Sep 2022
73
82
17 Jan 2011
75
76
Total Floor Area
41 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
47
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
14 Derwent Close
Date
12 Aug 2019
Current
Potential
67
75
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
12 Aug 2019
67
75
24 May 2009
47
58
Total Floor Area
70 sq m
Current CO2 Emissions Level
4.3
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
61
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
15 Derwent Close
Date
6 Mar 2023
Current
Potential
73
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
6 Mar 2023
73
80
1 Feb 2013
79
81
Total Floor Area
42 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
63
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
16 Derwent Close
Date
20 Apr 2010
Current
Potential
47
48
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
20 Apr 2010
47
48
Total Floor Area
71 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
3.5
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
17 Derwent Close
Date
26 Sep 2019
Current
Potential
71
75
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
26 Sep 2019
71
75
23 Sep 2009
68
72
Total Floor Area
41 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
64
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
18 Derwent Close
Date
27 Jan 2015
Current
Potential
59
67
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1976-1982
Certificate History
27 Jan 2015
59
67
Total Floor Area
70 sq m
Current CO2 Emissions Level
5.5
Potential CO2 Emissions Level
4.6
CO2 per sq m per Year
79
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
19 Derwent Close
Date
20 May 2019
Current
Potential
76
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
20 May 2019
76
80
Total Floor Area
39 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
60
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
2 Derwent Close
Date
25 May 2010
Current
Potential
66
73
Property Type
Flat
Built Form
N/A
Constructed
1996-2002
Certificate History
25 May 2010
66
73
Total Floor Area
63 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
52
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
2 DERWENT CLOSE, LITTLE CHALFONT
Date
15 Mar 2021
Current
Potential
61
75
Property Type
Flat
Built Form
Semi-Detached
Constructed
1991-1995
Certificate History
15 Mar 2021
61
75
Total Floor Area
61 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
68
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
20 Derwent Close
Date
1 Nov 2013
Current
Potential
60
77
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
1 Nov 2013
60
77
11 Jun 2009
66
71
Total Floor Area
71 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
42
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
21 Derwent Close
Date
1 Apr 2019
Current
Potential
65
75
Property Type
Flat
Built Form
End-Terrace
Constructed
1991-1995
Certificate History
1 Apr 2019
65
75
5 May 2009
63
65
Total Floor Area
41 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
84
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
1
Address
22 Derwent Close
Date
2 Nov 2022
Current
Potential
70
75
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
2 Nov 2022
70
75
12 Sep 2009
58
74
Total Floor Area
70 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
56
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
23 Derwent Close
Date
27 Nov 2021
Current
Potential
65
78
Property Type
Maisonette
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
27 Nov 2021
65
78
4 Oct 2008
25
63
Total Floor Area
58 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
51
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
24 Derwent Close
Date
15 Nov 2023
Current
Potential
72
75
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
15 Nov 2023
72
75
11 Dec 2013
66
75
Total Floor Area
71 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
55
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
1
Address
25 Derwent Close
Date
15 Mar 2022
Current
Potential
57
74
Property Type
Flat
Built Form
Semi-Detached
Constructed
1991-1995
Certificate History
15 Mar 2022
57
74
15 Mar 2022
47
74
Total Floor Area
64 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
60
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
26 Derwent Close
Date
11 Jan 2019
Current
Potential
69
74
Property Type
Flat
Built Form
End-Terrace
Constructed
1983-1990
Certificate History
11 Jan 2019
69
74
Total Floor Area
61 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
61
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
3 DERWENT CLOSE
Date
2 Jun 2021
Current
Potential
73
77
Property Type
Flat
Built Form
Detached
Constructed
2003-2006
Certificate History
2 Jun 2021
73
77
Total Floor Area
63 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
54
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
3 Derwent Close
Date
5 Sep 2010
Current
Potential
53
58
Property Type
Maisonette
Built Form
N/A
Constructed
1983-1990
Certificate History
5 Sep 2010
53
58
Total Floor Area
62 sq m
Current CO2 Emissions Level
4.5
Potential CO2 Emissions Level
4.3
CO2 per sq m per Year
73
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
4 Derwent Close
Date
28 Jun 2018
Current
Potential
62
72
Property Type
Maisonette
Built Form
Semi-Detached
Constructed
1991-1995
Certificate History
28 Jun 2018
62
72
Total Floor Area
75 sq m
Current CO2 Emissions Level
5.2
Potential CO2 Emissions Level
4.0
CO2 per sq m per Year
70
Mains Gas Available
No
Habitable Rooms
5
Number of Extensions
1
Address
5 Derwent Close
Date
25 Jun 2019
Current
Potential
61
77
Property Type
Flat
Built Form
Semi-Detached
Constructed
1976-1982
Certificate History
25 Jun 2019
61
77
13 Nov 2008
69
73
Total Floor Area
45 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
91
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
6 Derwent Close
Date
4 Mar 2020
Current
Potential
65
71
Property Type
Maisonette
Built Form
End-Terrace
Constructed
1983-1990
Certificate History
4 Mar 2020
65
71
17 Dec 2009
66
70
Total Floor Area
72 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
4.0
CO2 per sq m per Year
64
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
8 Derwent Close
Date
12 Sep 2018
Current
Potential
49
74
Property Type
House
Built Form
Detached
Constructed
1996-2002
Certificate History
12 Sep 2018
49
74
9 Mar 2018
68
74
Total Floor Area
60 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
59
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
9 Derwent Close
Date
24 Jun 2014
Current
Potential
60
69
Property Type
Flat
Built Form
Detached
Constructed
1991-1995
Certificate History
24 Jun 2014
60
69
11 Oct 2011
61
66
12 Feb 2009
55
62
Total Floor Area
57 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
71
Mains Gas Available
No
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.