PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Long John, HEMEL HEMPSTEAD, HP3 9LP
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 Long John, HP3 9LP 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 Long John, HEMEL HEMPSTEAD, HP3 9LP
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
52 Long John
Date
6 Dec 2011
Current
Potential
65
74
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
6 Dec 2011
65
74
Total Floor Area
82 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
52 LONG JOHN, HEMEL HEMPSTEAD
Date
17 Dec 2020
Current
Potential
69
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
17 Dec 2020
69
85
Total Floor Area
81 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
54 Long John
Date
16 Feb 2024
Current
Potential
72
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
16 Feb 2024
72
87
6 Dec 2011
71
72
Total Floor Area
75 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
55 LONG JOHN, HEMEL HEMPSTEAD
Date
16 Nov 2020
Current
Potential
72
86
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
16 Nov 2020
72
86
Total Floor Area
83 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
56 Long John
Date
6 Dec 2011
Current
Potential
70
72
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
6 Dec 2011
70
72
Total Floor Area
82 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
57 Long John
Date
25 Aug 2010
Current
Potential
64
79
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
25 Aug 2010
64
79
Total Floor Area
74 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
58 Long John
Date
5 Jul 2024
Current
Potential
71
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
5 Jul 2024
71
87
Total Floor Area
76 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
59 Long John
Date
14 Aug 2012
Current
Potential
68
89
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
14 Aug 2012
68
89
Total Floor Area
81 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
60 Long John
Date
6 Dec 2011
Current
Potential
64
71
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
6 Dec 2011
64
71
Total Floor Area
82 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
61 Long John
Date
9 Jul 2015
Current
Potential
36
75
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
9 Jul 2015
36
75
Total Floor Area
115 sq m
Current CO2 Emissions Level
9.7
Potential CO2 Emissions Level
3.6
CO2 per sq m per Year
84
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
62 Long John
Date
24 Mar 2010
Current
Potential
49
70
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
24 Mar 2010
49
70
Total Floor Area
73 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
74
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
63 Long John
Date
11 Jun 2019
Current
Potential
43
74
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
11 Jun 2019
43
74
1 Jun 2009
64
77
Total Floor Area
66 sq m
Current CO2 Emissions Level
5.7
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
87
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
64 Long John
Date
16 Jan 2012
Current
Potential
67
68
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
16 Jan 2012
67
68
Total Floor Area
106 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
3.6
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
65 Long John
Date
24 Jul 2014
Current
Potential
65
89
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
24 Jul 2014
65
89
Total Floor Area
89 sq m
Current CO2 Emissions Level
3.5
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
66 Long John
Date
21 Feb 2014
Current
Potential
63
83
Property Type
House
Built Form
Mid-Terrace
Constructed
1976-1982
Certificate History
21 Feb 2014
63
83
Total Floor Area
106 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
67 Long John
Date
17 Jun 2014
Current
Potential
57
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
17 Jun 2014
57
85
30 Mar 2014
43
77
24 Oct 2013
36
84
24 Oct 2013
36
83
Total Floor Area
87 sq m
Current CO2 Emissions Level
4.4
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
68 Long John
Date
22 Jun 2022
Current
Potential
62
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
22 Jun 2022
62
87
Total Floor Area
110 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
7
Number of Extensions
0
Address
69 Long John
Date
6 Dec 2011
Current
Potential
63
72
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
Certificate History
6 Dec 2011
63
72
25 Jul 2010
66
73
Total Floor Area
108 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
71 Long John
Date
17 Jul 2023
Current
Potential
80
81
Property Type
Flat
Built Form
Semi-Detached
Constructed
2007-2011
Certificate History
17 Jul 2023
80
81
20 Apr 2011
84
85
Total Floor Area
67 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
22
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
73 Long John
Date
20 Apr 2011
Current
Potential
84
85
Property Type
Flat
Built Form
N/A
Constructed
N/A
Certificate History
20 Apr 2011
84
85
Total Floor Area
68 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
75 Long John
Date
20 Apr 2011
Current
Potential
86
87
Property Type
Flat
Built Form
N/A
Constructed
N/A
Certificate History
20 Apr 2011
86
87
Total Floor Area
68 sq m
Current CO2 Emissions Level
0.8
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
12
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
77 Long John
Date
20 Apr 2011
Current
Potential
86
87
Property Type
Flat
Built Form
N/A
Constructed
N/A
Certificate History
20 Apr 2011
86
87
Total Floor Area
68 sq m
Current CO2 Emissions Level
0.8
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
12
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
79 Long John
Date
20 Apr 2011
Current
Potential
84
85
Property Type
Flat
Built Form
N/A
Constructed
N/A
Certificate History
20 Apr 2011
84
85
Total Floor Area
68 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
81 Long John
Date
20 Apr 2011
Current
Potential
84
85
Property Type
Flat
Built Form
N/A
Constructed
N/A
Certificate History
20 Apr 2011
84
85
Total Floor Area
68 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
89 Long John
Date
13 Jun 2024
Current
Potential
60
85
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
13 Jun 2024
60
85
Total Floor Area
73 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
90 Long John
Date
6 Dec 2011
Current
Potential
64
70
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
6 Dec 2011
64
70
Total Floor Area
72 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
92 Long John
Date
2 Nov 2023
Current
Potential
60
84
Property Type
House
Built Form
Semi-Detached
Constructed
1967-1975
Certificate History
2 Nov 2023
60
84
Total Floor Area
73 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
93 Long John
Date
21 Jul 2015
Current
Potential
64
85
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
21 Jul 2015
64
85
9 Jul 2015
45
87
15 Apr 2009
48
72
Total Floor Area
73 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
95 Long John
Date
6 Dec 2011
Current
Potential
32
35
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
6 Dec 2011
32
35
Total Floor Area
72 sq m
Current CO2 Emissions Level
10.0
Potential CO2 Emissions Level
9.9
CO2 per sq m per Year
140
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
96 Long John
Date
18 Nov 2024
Current
Potential
65
84
Property Type
House
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
18 Nov 2024
65
84
11 Jul 2024
68
86
Total Floor Area
73 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
4
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.