PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Northumberland Avenue, AYLESBURY, HP21 7HJ

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 Northumberland Avenue, HP21 7HJ 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 Northumberland Avenue, AYLESBURY, HP21 7HJ
Period Covered: 2008 - 31 October 2024

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
15, Northumberland Avenue
Date
19 May 2021
Current
Potential
53
70
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
19 May 2021
53
70
Total Floor Area
134 sq m
Current CO2 Emissions Level
6.9
Potential CO2 Emissions Level
4.4
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
2
Address
17 Northumberland Avenue
Date
3 Feb 2010
Current
Potential
75
79
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
3 Feb 2010
75
79
Total Floor Area
199 sq m
Current CO2 Emissions Level
4.9
Potential CO2 Emissions Level
4.3
CO2 per sq m per Year
24
Mains Gas Available
Yes
Habitable Rooms
10
Number of Extensions
2
Address
19 Northumberland Avenue
Date
21 Apr 2024
Current
Potential
64
76
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
21 Apr 2024
64
76
19 Mar 2013
58
79
Total Floor Area
151 sq m
Current CO2 Emissions Level
6.1
Potential CO2 Emissions Level
4.0
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
3
Address
25 Northumberland Avenue
Date
26 Jul 2024
Current
Potential
70
82
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
26 Jul 2024
70
82
Total Floor Area
98 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
27 Northumberland Avenue
Date
24 Feb 2011
Current
Potential
53
67
Property Type
House
Built Form
Detached
Constructed
1967-1975
+
Certificate History
24 Feb 2011
53
67
Total Floor Area
113 sq m
Current CO2 Emissions Level
5.5
Potential CO2 Emissions Level
3.7
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
28 Northumberland Avenue
Date
14 Sep 2016
Current
Potential
55
84
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
14 Sep 2016
55
84
Total Floor Area
114 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
30 Northumberland Avenue
Date
25 Jan 2022
Current
Potential
51
74
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
25 Jan 2022
51
74
Total Floor Area
101 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
62
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
31 Northumberland Avenue
Date
21 Mar 2012
Current
Potential
28
51
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
21 Mar 2012
28
51
Total Floor Area
91 sq m
Current CO2 Emissions Level
9.2
Potential CO2 Emissions Level
9.0
CO2 per sq m per Year
101
Mains Gas Available
No
Habitable Rooms
5
Number of Extensions
0
Address
32 Northumberland Avenue
Date
17 Sep 2020
Current
Potential
61
79
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
17 Sep 2020
61
79
17 Sep 2020
61
79
12 Apr 2016
39
65
Total Floor Area
196 sq m
Current CO2 Emissions Level
8.3
Potential CO2 Emissions Level
4.5
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
3
Address
33 Northumberland Avenue
Date
12 Sep 2016
Current
Potential
57
82
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
12 Sep 2016
57
82
Total Floor Area
100 sq m
Current CO2 Emissions Level
5.3
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
34 Northumberland Avenue
Date
15 Jan 2010
Current
Potential
48
61
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
15 Jan 2010
48
61
Total Floor Area
106 sq m
Current CO2 Emissions Level
6.9
Potential CO2 Emissions Level
5.2
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
35 Northumberland Avenue
Date
6 May 2015
Current
Potential
66
87
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
6 May 2015
66
87
Total Floor Area
90 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
36 Northumberland Avenue
Date
16 Jul 2023
Current
Potential
60
80
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
16 Jul 2023
60
80
Total Floor Area
136 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
37 Northumberland Avenue
Date
28 Dec 2016
Current
Potential
67
78
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
28 Dec 2016
67
78
4 May 2009
53
65
4 May 2009
53
67
Total Floor Area
190 sq m
Current CO2 Emissions Level
5.9
Potential CO2 Emissions Level
3.9
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
2
Address
39 NORTHUMBERLAND AVENUE
Date
23 Jun 2021
Current
Potential
73
80
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
23 Jun 2021
73
80
Total Floor Area
156 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
4
Address
39 Northumberland Avenue
Date
29 Jul 2010
Current
Potential
35
66
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
29 Jul 2010
35
66
Total Floor Area
123 sq m
Current CO2 Emissions Level
9.4
Potential CO2 Emissions Level
4.4
CO2 per sq m per Year
76
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
40 Northumberland Avenue
Date
30 Jan 2014
Current
Potential
75
81
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
30 Jan 2014
75
81
Total Floor Area
199 sq m
Current CO2 Emissions Level
4.8
Potential CO2 Emissions Level
3.6
CO2 per sq m per Year
24
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
41 NORTHUMBERLAND AVENUE
Date
13 Jul 2021
Current
Potential
78
83
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
13 Jul 2021
78
83
Total Floor Area
231 sq m
Current CO2 Emissions Level
5.0
Potential CO2 Emissions Level
4.1
CO2 per sq m per Year
22
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
3
Address
41 Northumberland Avenue
Date
7 May 2009
Current
Potential
50
72
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
7 May 2009
50
72
Total Floor Area
112 sq m
Current CO2 Emissions Level
6.2
Potential CO2 Emissions Level
3.5
CO2 per sq m per Year
64
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
43 Northumberland Avenue
Date
29 Nov 2022
Current
Potential
55
77
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
29 Nov 2022
55
77
Total Floor Area
114 sq m
Current CO2 Emissions Level
6.4
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
44 Northumberland Avenue
Date
8 Apr 2018
Current
Potential
39
80
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
8 Apr 2018
39
80
Total Floor Area
94 sq m
Current CO2 Emissions Level
7.8
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
82
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
45 Northumberland Avenue
Date
18 Sep 2018
Current
Potential
39
74
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
18 Sep 2018
39
74
Total Floor Area
107 sq m
Current CO2 Emissions Level
8.5
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
79
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
2
Address
46 Northumberland Avenue
Date
6 Oct 2013
Current
Potential
70
80
Property Type
House
Built Form
Detached
Constructed
1967-1975
+
Certificate History
6 Oct 2013
70
80
28 Sep 2009
51
70
Total Floor Area
156 sq m
Current CO2 Emissions Level
4.8
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
2
Address
48 Northumberland Avenue
Date
4 May 2020
Current
Potential
45
82
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
4 May 2020
45
82
Total Floor Area
98 sq m
Current CO2 Emissions Level
7.0
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
71
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
52 Northumberland Avenue
Date
29 Sep 2014
Current
Potential
54
77
Property Type
House
Built Form
Detached
Constructed
1950-1966
+
Certificate History
29 Sep 2014
54
77
Total Floor Area
103 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
54 Northumberland Avenue
Date
4 Apr 2022
Current
Potential
71
82
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
4 Apr 2022
71
82
7 Jun 2011
63
66
Total Floor Area
132 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
3
Address
60 Northumberland Avenue
Date
1 Sep 2013
Current
Potential
67
85
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
1 Sep 2013
67
85
Total Floor Area
91 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
5
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.