PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Wadnall Way, KNEBWORTH, SG3 6DX
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 Wadnall Way, SG3 6DX 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 Wadnall Way, KNEBWORTH, SG3 6DX
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
100 Wadnall Way
Date
9 Oct 2011
Current
Potential
62
71
Property Type
Flat
Built Form
Semi-Detached
Constructed
1991-1995
Certificate History
9 Oct 2011
62
71
Total Floor Area
48 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
100 WADNALL WAY, KNEBWORTH
Date
25 Mar 2021
Current
Potential
73
76
Property Type
Maisonette
Built Form
Semi-Detached
Constructed
1983-1990
Certificate History
25 Mar 2021
73
76
Total Floor Area
49 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
102 Wadnall Way
Date
5 Mar 2009
Current
Potential
74
82
Property Type
Flat
Built Form
End-Terrace
Constructed
1983-1990
Certificate History
5 Mar 2009
74
82
Total Floor Area
46 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
102 WADNALL WAY, KNEBWORTH
Date
29 Apr 2021
Current
Potential
75
75
Property Type
Flat
Built Form
Semi-Detached
Constructed
1983-1990
Certificate History
29 Apr 2021
75
75
Total Floor Area
47 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
104 Wadnall Way
Date
13 Jan 2010
Current
Potential
75
79
Property Type
Flat
Built Form
Semi-Detached
Constructed
1976-1982
Certificate History
13 Jan 2010
75
79
Total Floor Area
46 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
106 Wadnall Way
Date
31 Jan 2025
Current
Potential
71
85
Property Type
House
Built Form
End-Terrace
Constructed
1983-1990
Certificate History
31 Jan 2025
71
85
Total Floor Area
80 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
108 Wadnall Way
Date
31 Aug 2021
Current
Potential
74
88
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
31 Aug 2021
74
88
Total Floor Area
56 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
110 Wadnall Way
Date
25 Aug 2020
Current
Potential
73
90
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
25 Aug 2020
73
90
18 Jun 2009
75
80
Total Floor Area
56 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
112 Wadnall Way
Date
3 Jun 2018
Current
Potential
66
90
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
3 Jun 2018
66
90
Total Floor Area
57 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
114 Wadnall Way
Date
14 Jun 2011
Current
Potential
68
74
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
14 Jun 2011
68
74
Total Floor Area
57 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
116 Wadnall Way
Date
28 Mar 2025
Current
Potential
71
84
Property Type
House
Built Form
End-Terrace
Constructed
1983-1990
Certificate History
28 Mar 2025
71
84
24 Jan 2014
72
85
19 Aug 2009
67
75
Total Floor Area
85 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
118 Wadnall Way
Date
24 May 2012
Current
Potential
63
88
Property Type
House
Built Form
End-Terrace
Constructed
1983-1990
Certificate History
24 May 2012
63
88
Total Floor Area
74 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
122 Wadnall Way
Date
6 Oct 2017
Current
Potential
64
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
6 Oct 2017
64
87
Total Floor Area
74 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
124 Wadnall Way
Date
24 Sep 2018
Current
Potential
70
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
24 Sep 2018
70
85
Total Floor Area
75 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
126 Wadnall Way
Date
25 Jul 2023
Current
Potential
71
84
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
25 Jul 2023
71
84
Total Floor Area
74 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
128 Wadnall Way
Date
24 Apr 2022
Current
Potential
66
86
Property Type
House
Built Form
Semi-Detached
Constructed
1983-1990
Certificate History
24 Apr 2022
66
86
20 Sep 2011
66
71
Total Floor Area
74 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
52 Wadnall Way
Date
5 May 2017
Current
Potential
73
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
5 May 2017
73
87
Total Floor Area
76 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
2
Address
56 Wadnall Way
Date
4 Jun 2015
Current
Potential
67
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
4 Jun 2015
67
85
Total Floor Area
74 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
62 Wadnall Way
Date
19 Jan 2023
Current
Potential
62
89
Property Type
House
Built Form
Enclosed End-Terrace
Constructed
1983-1990
Certificate History
19 Jan 2023
62
89
27 May 2011
64
73
Total Floor Area
47 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
58
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
64 Wadnall Way
Date
20 Jun 2018
Current
Potential
69
86
Property Type
House
Built Form
Semi-Detached
Constructed
1983-1990
Certificate History
20 Jun 2018
69
86
Total Floor Area
71 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
66 WADNALL WAY, KNEBWORTH
Date
22 Apr 2021
Current
Potential
61
87
Property Type
House
Built Form
End-Terrace
Constructed
1983-1990
Certificate History
22 Apr 2021
61
87
Total Floor Area
58 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
68 Wadnall Way
Date
20 May 2019
Current
Potential
76
90
Property Type
House
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
20 May 2019
76
90
10 Jun 2009
79
79
Total Floor Area
64 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
70 Wadnall Way
Date
10 May 2022
Current
Potential
71
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
10 May 2022
71
87
26 Aug 2009
73
80
Total Floor Area
57 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
74 Wadnall Way
Date
29 Aug 2019
Current
Potential
69
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
29 Aug 2019
69
77
21 Jun 2009
70
80
Total Floor Area
49 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
76 Wadnall Way
Date
19 Feb 2020
Current
Potential
75
76
Property Type
Maisonette
Built Form
Semi-Detached
Constructed
1983-1990
Certificate History
19 Feb 2020
75
76
13 Jan 2010
76
81
Total Floor Area
49 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
78 Wadnall Way
Date
10 Mar 2025
Current
Potential
73
73
Property Type
Maisonette
Built Form
Enclosed End-Terrace
Constructed
1983-1990
Certificate History
10 Mar 2025
73
73
23 Apr 2013
75
75
Total Floor Area
50 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
82 Wadnall Way
Date
28 Jun 2010
Current
Potential
70
79
Property Type
Maisonette
Built Form
N/A
Constructed
1983-1990
Certificate History
28 Jun 2010
70
79
Total Floor Area
53 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
84 Wadnall Way
Date
15 Oct 2018
Current
Potential
73
77
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1983-1990
Certificate History
15 Oct 2018
73
77
Total Floor Area
45 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
86 Wadnall Way
Date
28 Jun 2016
Current
Potential
64
85
Property Type
House
Built Form
End-Terrace
Constructed
1983-1990
Certificate History
28 Jun 2016
64
85
Total Floor Area
82 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
88 Wadnall Way
Date
27 Jun 2024
Current
Potential
72
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
27 Jun 2024
72
85
16 Jun 2014
66
89
Total Floor Area
74 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
90 Wadnall Way
Date
25 Jul 2022
Current
Potential
68
83
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
25 Jul 2022
68
83
19 Jun 2012
67
88
Total Floor Area
84 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
92 Wadnall Way
Date
21 Feb 2014
Current
Potential
67
89
Property Type
House
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
21 Feb 2014
67
89
Total Floor Area
74 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
96 Wadnall Way
Date
12 Nov 2025
Current
Potential
64
78
Property Type
Flat
Built Form
Not Recorded
Constructed
1983-1990
Certificate History
12 Nov 2025
64
78
Total Floor Area
47 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
98 Wadnall Way
Date
25 Apr 2017
Current
Potential
75
79
Property Type
Flat
Built Form
Semi-Detached
Constructed
1996-2002
Certificate History
25 Apr 2017
75
79
24 Aug 2011
66
78
Total Floor Area
42 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
34
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 2026.