PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Datchworth Green, KNEBWORTH, SG3 6TL
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 Datchworth Green, SG3 6TL 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 Datchworth Green, KNEBWORTH, SG3 6TL
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Datchworth Green, Datchworth
Date
4 Jul 2023
Current
Potential
64
96
Property Type
House
Built Form
Semi-Detached
Constructed
before 1900
Certificate History
4 Jul 2023
64
96
24 Aug 2011
59
59
Total Floor Area
125 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
11-13 Datchworth Green, Datchworth
Date
4 Dec 2017
Current
Potential
55
105
Property Type
Bungalow
Built Form
Detached
Constructed
before 1900
Certificate History
4 Dec 2017
55
105
25 Jun 2014
30
81
Total Floor Area
78 sq m
Current CO2 Emissions Level
4.9
Potential CO2 Emissions Level
-0.1
CO2 per sq m per Year
63
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
2
Address
12 Datchworth Green, Datchworth
Date
21 Dec 2016
Current
Potential
42
73
Property Type
House
Built Form
Detached
Constructed
1900-1929
Certificate History
21 Dec 2016
42
73
Total Floor Area
199 sq m
Current CO2 Emissions Level
11.0
Potential CO2 Emissions Level
4.7
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
3
Address
14 Datchworth Green, Datchworth
Date
26 Sep 2018
Current
Potential
44
70
Property Type
House
Built Form
Detached
Constructed
1967-1975
Certificate History
26 Sep 2018
44
70
Total Floor Area
239 sq m
Current CO2 Emissions Level
15.0
Potential CO2 Emissions Level
8.2
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
10
Number of Extensions
2
Address
15 Datchworth Green, Datchworth
Date
1 Jul 2018
Current
Potential
45
110
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1900-1929
Certificate History
1 Jul 2018
45
110
Total Floor Area
60 sq m
Current CO2 Emissions Level
5.1
Potential CO2 Emissions Level
-0.6
CO2 per sq m per Year
84
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
16a Datchworth Green, Datchworth
Date
4 Jul 2022
Current
Potential
81
93
Property Type
House
Built Form
Detached
Constructed
1967-1975
Certificate History
4 Jul 2022
81
93
13 Jul 2017
75
77
13 Jul 2017
72
79
Total Floor Area
262 sq m
Current CO2 Emissions Level
6.0
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
10
Number of Extensions
1
Address
17 Datchworth Green, Datchworth
Date
1 Jul 2018
Current
Potential
57
108
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1900-1929
Certificate History
1 Jul 2018
57
108
Total Floor Area
67 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
-0.9
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
4 Datchworth Green, Datchworth
Date
19 Jul 2024
Current
Potential
63
74
Property Type
House
Built Form
Detached
Constructed
before 1900
Certificate History
19 Jul 2024
63
74
12 May 2014
71
82
Total Floor Area
205 sq m
Current CO2 Emissions Level
8.4
Potential CO2 Emissions Level
6.2
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
9
Number of Extensions
1
Address
40 Datchworth Green, Datchworth
Date
25 Jan 2024
Current
Potential
65
74
Property Type
House
Built Form
Detached
Constructed
1950-1966
Certificate History
25 Jan 2024
65
74
21 Jul 2014
32
70
Total Floor Area
305 sq m
Current CO2 Emissions Level
11.0
Potential CO2 Emissions Level
8.6
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
2
Address
42 Datchworth Green, Datchworth
Date
19 Jul 2023
Current
Potential
66
77
Property Type
House
Built Form
Detached
Constructed
1950-1966
Certificate History
19 Jul 2023
66
77
Total Floor Area
216 sq m
Current CO2 Emissions Level
8.0
Potential CO2 Emissions Level
5.4
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
3
Address
48 Datchworth Green, Datchworth
Date
21 Aug 2024
Current
Potential
48
79
Property Type
House
Built Form
Detached
Constructed
1950-1966
Certificate History
21 Aug 2024
48
79
Total Floor Area
100 sq m
Current CO2 Emissions Level
5.9
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
59
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
50 Datchworth Green, Datchworth
Date
29 Oct 2024
Current
Potential
53
74
Property Type
House
Built Form
Detached
Constructed
1950-1966
Certificate History
29 Oct 2024
53
74
Total Floor Area
158 sq m
Current CO2 Emissions Level
8.7
Potential CO2 Emissions Level
4.9
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
3
Address
56 Datchworth Green, Datchworth
Date
17 Aug 2016
Current
Potential
70
85
Property Type
House
Built Form
Semi-Detached
Constructed
1900-1929
Certificate History
17 Aug 2016
70
85
12 Mar 2009
52
67
Total Floor Area
97 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
3
Address
56a Datchworth Green, Datchworth
Date
11 Dec 2018
Current
Potential
83
95
Property Type
House
Built Form
Semi-Detached
Constructed
N/A
Certificate History
11 Dec 2018
83
95
Total Floor Area
79 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
17
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
56b Datchworth Green , Datchworth
Date
16 Mar 2021
Current
Potential
83
95
Property Type
House
Built Form
Semi-Detached
Constructed
2021
Certificate History
16 Mar 2021
83
95
Total Floor Area
80 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
16
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
61 Datchworth Green, Datchworth
Date
9 Apr 2013
Current
Potential
60
84
Property Type
House
Built Form
Semi-Detached
Constructed
before 1900
Certificate History
9 Apr 2013
60
84
Total Floor Area
95 sq m
Current CO2 Emissions Level
4.3
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
63 Datchworth Green, Datchworth
Date
8 Aug 2022
Current
Potential
54
81
Property Type
House
Built Form
Detached
Constructed
1967-1975
Certificate History
8 Aug 2022
54
81
Total Floor Area
148 sq m
Current CO2 Emissions Level
7.2
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
1
Address
66 Datchworth Green, Datchworth
Date
10 Nov 2023
Current
Potential
42
82
Property Type
House
Built Form
Detached
Constructed
1900-1929
Certificate History
10 Nov 2023
42
82
Total Floor Area
105 sq m
Current CO2 Emissions Level
8.1
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
77
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
2
Address
68 Datchworth Green, Datchworth
Date
14 Jun 2022
Current
Potential
51
78
Property Type
Bungalow
Built Form
Detached
Constructed
1967-1975
Certificate History
14 Jun 2022
51
78
Total Floor Area
100 sq m
Current CO2 Emissions Level
6.4
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
63
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
9 Datchworth Green, Datchworth
Date
1 Jul 2018
Current
Potential
69
98
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
1 Jul 2018
69
98
Total Floor Area
144 sq m
Current CO2 Emissions Level
4.5
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
8
Number of Extensions
3
Address
93 Datchworth Green, Datchworth
Date
6 Aug 2019
Current
Potential
82
89
Property Type
House
Built Form
Detached
Constructed
N/A
Certificate History
6 Aug 2019
82
89
Total Floor Area
262 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
95 Datchworth Green, Datchworth
Date
17 Sep 2012
Current
Potential
47
66
Property Type
Bungalow
Built Form
Detached
Constructed
1950-1966
Certificate History
17 Sep 2012
47
66
Total Floor Area
162 sq m
Current CO2 Emissions Level
9.1
Potential CO2 Emissions Level
5.9
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
97 Datchworth Green, Datchworth
Date
9 Aug 2015
Current
Potential
66
80
Property Type
House
Built Form
Detached
Constructed
1950-1966
Certificate History
9 Aug 2015
66
80
Total Floor Area
216 sq m
Current CO2 Emissions Level
7.2
Potential CO2 Emissions Level
4.0
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
9
Number of Extensions
3
Address
99 Datchworth Green, Datchworth
Date
4 Jul 2011
Current
Potential
40
52
Property Type
House
Built Form
Semi-Detached
Constructed
before 1900
Certificate History
4 Jul 2011
40
52
Total Floor Area
96 sq m
Current CO2 Emissions Level
8.3
Potential CO2 Emissions Level
6.5
CO2 per sq m per Year
74
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
99a Datchworth Green, Datchworth
Date
4 Jul 2011
Current
Potential
48
58
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
4 Jul 2011
48
58
Total Floor Area
36 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
93
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
Flat above 5 Datchworth Green, Datchworth
Date
17 Dec 2020
Current
Potential
70
71
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1900
Certificate History
17 Dec 2020
70
71
Total Floor Area
48 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
43
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.