PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Black Thorn Close, DURHAM, DH7 8BE

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 Black Thorn Close, DH7 8BE 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 Black Thorn Close, DURHAM, DH7 8BE
Period Covered: 2008 - 31 January 2025

Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Black Thorn Close, Brandon
Date
23 Oct 2014
Current
Potential
66
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
23 Oct 2014
66
88
1 Oct 2008
77
77
Total Floor Area
55 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
10 Black Thorn Close, Brandon
Date
18 Jan 2023
Current
Potential
69
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
18 Jan 2023
69
88
18 Jan 2023
69
88
23 Oct 2014
65
88
8 Jul 2013
56
87
Total Floor Area
42 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
11 Black Thorn Close, Brandon
Date
27 Mar 2023
Current
Potential
71
90
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1967-1975
+
Certificate History
27 Mar 2023
71
90
23 Oct 2014
66
87
Total Floor Area
40 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
12 Black Thorn Close, Brandon
Date
13 Oct 2014
Current
Potential
64
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
13 Oct 2014
64
89
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
14 Black Thorn Close, Brandon
Date
28 Nov 2022
Current
Potential
70
87
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
28 Nov 2022
70
87
13 Oct 2014
64
89
20 Jul 2009
65
71
Total Floor Area
53 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
15 Black Thorn Close, Brandon
Date
23 Aug 2024
Current
Potential
71
90
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1967-1975
+
Certificate History
23 Aug 2024
71
90
24 Oct 2014
64
89
17 Jul 2014
64
97
12 Mar 2009
77
77
12 Mar 2009
77
77
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
16 Black Thorn Close, Brandon
Date
23 Oct 2014
Current
Potential
67
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
23 Oct 2014
67
88
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
17 Black Thorn Close, Brandon
Date
27 Aug 2024
Current
Potential
70
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1967-1975
+
Certificate History
27 Aug 2024
70
89
14 Oct 2014
64
89
17 Jul 2014
59
96
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
49
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
18 Black Thorn Close, Brandon
Date
23 Oct 2014
Current
Potential
69
90
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
23 Oct 2014
69
90
15 Jul 2014
57
91
Total Floor Area
55 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
19 Black Thorn Close, Brandon
Date
23 Oct 2014
Current
Potential
67
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
23 Oct 2014
67
88
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
2 Black Thorn Close, Brandon
Date
3 Apr 2023
Current
Potential
70
89
Property Type
House
Built Form
Mid-Terrace
Constructed
1967-1975
+
Certificate History
3 Apr 2023
70
89
16 Feb 2023
69
87
13 Oct 2014
67
90
6 Jul 2009
71
76
Total Floor Area
40 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
20 Black Thorn Close, Brandon
Date
13 Oct 2014
Current
Potential
66
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
13 Oct 2014
66
88
Total Floor Area
55 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
21 Black Thorn Close, Brandon
Date
18 Oct 2022
Current
Potential
72
90
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1983-1990
+
Certificate History
18 Oct 2022
72
90
23 Oct 2014
67
90
7 Feb 2011
66
71
Total Floor Area
50 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
22 Black Thorn Close, Brandon
Date
3 May 2022
Current
Potential
70
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1983-1990
+
Certificate History
3 May 2022
70
88
23 Oct 2014
66
88
15 Jul 2014
58
94
Total Floor Area
50 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
24 Black Thorn Close, Brandon
Date
4 Sep 2024
Current
Potential
70
87
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
4 Sep 2024
70
87
3 Nov 2014
66
87
24 Oct 2014
64
89
Total Floor Area
54 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
25 Black Thorn Close, Brandon
Date
13 Oct 2014
Current
Potential
65
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
13 Oct 2014
65
88
8 Mar 2010
69
73
Total Floor Area
55 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
26 Black Thorn Close, Brandon
Date
3 Nov 2022
Current
Potential
69
87
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
3 Nov 2022
69
87
13 Oct 2014
69
90
15 Jul 2014
59
92
4 Nov 2010
69
74
Total Floor Area
54 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
27 Black Thorn Close, Brandon
Date
8 Nov 2022
Current
Potential
69
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1976-1982
+
Certificate History
8 Nov 2022
69
88
2 May 2022
71
89
23 Oct 2014
64
89
Total Floor Area
46 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
28 Black Thorn Close, Brandon
Date
23 Oct 2014
Current
Potential
66
87
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
23 Oct 2014
66
87
14 Jan 2010
70
73
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
29 Black Thorn Close, Brandon
Date
10 Sep 2022
Current
Potential
72
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1930-1949
+
Certificate History
10 Sep 2022
72
89
23 Oct 2014
64
89
14 Jul 2014
56
90
Total Floor Area
55 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
3 Black Thorn Close, Brandon
Date
30 Sep 2022
Current
Potential
71
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
30 Sep 2022
71
89
13 Oct 2014
66
87
Total Floor Area
49 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
30 Black Thorn Close, Brandon
Date
23 Oct 2014
Current
Potential
67
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
23 Oct 2014
67
88
25 Mar 2011
50
54
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
31 Black Thorn Close, Brandon
Date
28 Nov 2022
Current
Potential
70
87
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
28 Nov 2022
70
87
28 Nov 2022
70
87
23 Oct 2014
64
89
16 May 2010
67
73
Total Floor Area
54 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
32 Black Thorn Close, Brandon
Date
11 May 2022
Current
Potential
69
87
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1967-1975
+
Certificate History
11 May 2022
69
87
23 Oct 2014
65
88
14 Jul 2014
57
90
Total Floor Area
50 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
33 Black Thorn Close, Brandon
Date
12 Apr 2023
Current
Potential
70
88
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1983-1990
+
Certificate History
12 Apr 2023
70
88
23 Oct 2014
64
89
14 Jul 2014
56
89
Total Floor Area
49 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
34 Black Thorn Close, Brandon
Date
16 Jan 2023
Current
Potential
72
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1976-1982
+
Certificate History
16 Jan 2023
72
89
23 Oct 2014
69
90
16 Jul 2014
56
94
Total Floor Area
53 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
35 Black Thorn Close, Brandon
Date
11 Apr 2023
Current
Potential
71
89
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
11 Apr 2023
71
89
25 Oct 2014
64
89
2 Feb 2012
67
70
Total Floor Area
47 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
36 Black Thorn Close, Brandon
Date
4 Sep 2024
Current
Potential
69
86
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
4 Sep 2024
69
86
26 Mar 2015
70
87
26 Oct 2014
67
90
15 Jul 2014
56
89
Total Floor Area
56 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
42
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
37 Black Thorn Close, Brandon
Date
30 May 2024
Current
Potential
69
86
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
30 May 2024
69
86
25 Oct 2014
64
89
15 Jul 2014
57
91
Total Floor Area
54 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
39 Black Thorn Close, Brandon
Date
2 Oct 2022
Current
Potential
73
90
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1983-1990
+
Certificate History
2 Oct 2022
73
90
25 Oct 2014
66
87
6 Jul 2014
58
92
Total Floor Area
49 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
4 Black Thorn Close, Brandon
Date
23 Aug 2024
Current
Potential
70
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
23 Aug 2024
70
89
24 Oct 2014
64
89
14 Jul 2011
58
67
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
40 Black Thorn Close, Brandon
Date
25 Oct 2014
Current
Potential
64
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
25 Oct 2014
64
89
29 Jun 2014
58
94
11 Jan 2012
62
68
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
52
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
41 Black Thorn Close, Brandon
Date
3 Oct 2022
Current
Potential
70
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1967-1975
+
Certificate History
3 Oct 2022
70
88
25 Oct 2014
65
88
Total Floor Area
49 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
42 Black Thorn Close, Brandon
Date
16 Apr 2023
Current
Potential
71
89
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1930-1949
+
Certificate History
16 Apr 2023
71
89
25 Oct 2014
66
88
6 Jul 2014
61
92
Total Floor Area
47 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
43 Black Thorn Close, Brandon
Date
25 Oct 2014
Current
Potential
69
90
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
25 Oct 2014
69
90
Total Floor Area
55 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
44 Black Thorn Close, Brandon
Date
2 Oct 2022
Current
Potential
70
91
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
2 Oct 2022
70
91
2 Oct 2022
70
90
25 Oct 2014
66
88
8 Oct 2008
71
77
Total Floor Area
36 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
45 Black Thorn Close, Brandon
Date
7 Feb 2023
Current
Potential
69
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
7 Feb 2023
69
88
7 Feb 2023
69
89
25 Oct 2014
67
88
Total Floor Area
41 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
46 Black Thorn Close, Brandon
Date
2 Nov 2022
Current
Potential
71
90
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
2 Nov 2022
71
90
2 Nov 2022
71
90
25 Oct 2014
65
88
14 Jun 2012
60
83
14 Jan 2010
68
73
Total Floor Area
46 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
47 Black Thorn Close, Brandon
Date
1 Oct 2024
Current
Potential
69
88
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
1950-1966
+
Certificate History
1 Oct 2024
69
88
26 Oct 2014
64
89
26 Apr 2012
59
83
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
5 Black Thorn Close, Brandon
Date
28 Mar 2024
Current
Potential
70
90
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1967-1975
+
Certificate History
28 Mar 2024
70
90
23 Oct 2014
67
90
19 Oct 2009
71
76
Total Floor Area
44 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
6 Black Thorn Close, Brandon
Date
13 Oct 2014
Current
Potential
67
88
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
13 Oct 2014
67
88
17 May 2009
68
73
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
7 Black Thorn Close, Brandon
Date
23 Aug 2024
Current
Potential
70
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1967-1975
+
Certificate History
23 Aug 2024
70
89
24 Oct 2014
64
89
27 Feb 2012
62
68
Total Floor Area
44 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
8 Black Thorn Close, Brandon
Date
6 May 2024
Current
Potential
73
91
Property Type
Bungalow
Built Form
Mid-Terrace
Constructed
1950-1966
+
Certificate History
6 May 2024
73
91
28 Apr 2024
70
89
23 Oct 2014
66
87
11 Aug 2014
64
90
16 Jul 2014
60
97
Total Floor Area
42 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
41
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
9 Black Thorn Close, Brandon
Date
23 Aug 2024
Current
Potential
69
89
Property Type
Bungalow
Built Form
End-Terrace
Constructed
1950-1966
+
Certificate History
23 Aug 2024
69
89
24 Oct 2014
67
90
7 Jul 2009
66
71
Total Floor Area
41 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
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.

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