PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Royal Drive, LONDON, N11 3FR
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 Royal Drive, N11 3FR 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 Royal Drive, LONDON, N11 3FR
Period Covered:
2008 - 31 October 2024
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
Flat 155 Princess Park Manor, Royal Drive
Date
22 Oct 2018
Current
Potential
55
61
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
22 Oct 2018
55
61
27 Oct 2008
76
78
Total Floor Area
61 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
47
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 158 Princess Park Manor, Royal Drive
Date
9 Sep 2013
Current
Potential
73
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
9 Sep 2013
73
78
Total Floor Area
59 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 159 Princess Park Manor, Royal Drive
Date
8 Jul 2019
Current
Potential
65
69
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
8 Jul 2019
65
69
Total Floor Area
61 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
45
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
Flat 160 Princess Park Manor, Royal Drive
Date
17 Mar 2015
Current
Potential
82
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
2007 onwards
Certificate History
17 Mar 2015
82
82
Total Floor Area
50 sq m
Current CO2 Emissions Level
0.9
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
18
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 161 Princess Park Manor, Royal Drive
Date
13 Sep 2017
Current
Potential
25
55
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
13 Sep 2017
25
55
13 Sep 2017
61
61
28 Nov 2012
76
80
18 Aug 2010
77
80
8 Jan 2010
65
74
Total Floor Area
67 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
81
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
Flat 163 Princess Park Manor, Royal Drive
Date
1 Feb 2019
Current
Potential
77
85
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
1 Feb 2019
77
85
Total Floor Area
100 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 164 Princess Park Manor, Royal Drive
Date
31 Jul 2009
Current
Potential
82
85
Property Type
Flat
Built Form
Enclosed End-Terrace
Constructed
1996-2002
Certificate History
31 Jul 2009
82
85
Total Floor Area
137 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
17
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 165, Princess Park Manor
Date
15 Oct 2012
Current
Potential
80
81
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
15 Oct 2012
80
81
Total Floor Area
61 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
20
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 166 Princess Park Manor, Royal Drive
Date
12 Nov 2014
Current
Potential
78
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
2003-2006
Certificate History
12 Nov 2014
78
82
Total Floor Area
62 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 167, Princess Park Manor
Date
25 Jul 2024
Current
Potential
83
83
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
25 Jul 2024
83
83
Total Floor Area
76 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
16
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 167 Princess Park Manor, Royal Drive
Date
8 Apr 2013
Current
Potential
82
82
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1996-2002
Certificate History
8 Apr 2013
82
82
8 Apr 2009
81
85
Total Floor Area
76 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
17
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
FLAT 168, PRINCESS PARK MANOR
Date
29 Mar 2021
Current
Potential
59
62
Property Type
Flat
Built Form
Semi-Detached
Constructed
1996-2002
Certificate History
29 Mar 2021
59
62
Total Floor Area
87 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
37
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
0
Address
Flat 168 Princess Park Manor, Royal Drive
Date
5 May 2011
Current
Potential
78
80
Property Type
Flat
Built Form
N/A
Constructed
1996-2002
Certificate History
5 May 2011
78
80
Total Floor Area
85 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 169 Princess Park Manor, Royal Drive
Date
17 Feb 2009
Current
Potential
83
85
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1996-2002
Certificate History
17 Feb 2009
83
85
9 Dec 2008
73
75
Total Floor Area
61 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 170 Princess Park Manor, Royal Drive
Date
4 Dec 2019
Current
Potential
80
81
Property Type
Flat
Built Form
Enclosed End-Terrace
Constructed
1996-2002
Certificate History
4 Dec 2019
80
81
8 Dec 2009
82
85
Total Floor Area
95 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
19
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 171, Princess Park Manor
Date
27 Nov 2018
Current
Potential
81
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
27 Nov 2018
81
82
Total Floor Area
143 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
17
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
FLAT 172, PRINCESS PARK MANOR
Date
24 Sep 2020
Current
Potential
74
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
24 Sep 2020
74
80
Total Floor Area
61 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
35
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
Flat 172 Princess Park Manor, Royal Drive
Date
29 Oct 2008
Current
Potential
83
85
Property Type
Flat
Built Form
Detached
Constructed
1996-2002
Certificate History
29 Oct 2008
83
85
Total Floor Area
60 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 173, Princess Park Manor
Date
13 Jan 2023
Current
Potential
75
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
13 Jan 2023
75
80
Total Floor Area
62 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
28
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 173 Princess Park Manor, Royal Drive
Date
3 Oct 2012
Current
Potential
78
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
3 Oct 2012
78
80
Total Floor Area
62 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 174 Princess Park Manor, Royal Drive
Date
17 Jun 2018
Current
Potential
73
76
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
17 Jun 2018
73
76
Total Floor Area
74 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
26
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 176, Princess Park Manor
Date
22 May 2023
Current
Potential
67
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
22 May 2023
67
77
Total Floor Area
60 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 176 Princess Park Manor, Royal Drive
Date
21 May 2013
Current
Potential
78
80
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1996-2002
Certificate History
21 May 2013
78
80
Total Floor Area
60 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
FLAT 177, PRINCESS PARK MANOR
Date
25 May 2021
Current
Potential
81
83
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
25 May 2021
81
83
Total Floor Area
108 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
17
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 177 Princess Park Manor, Royal Drive
Date
10 Nov 2018
Current
Potential
81
82
Property Type
Flat
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
10 Nov 2018
81
82
24 Nov 2008
82
84
Total Floor Area
118 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
18
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 178, Princess Park Manor
Date
27 Jul 2023
Current
Potential
81
81
Property Type
Flat
Built Form
Enclosed End-Terrace
Constructed
1930-1949
Certificate History
27 Jul 2023
81
81
Total Floor Area
139 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
4.2
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 178 Princess Park Manor, Royal Drive
Date
26 Mar 2013
Current
Potential
81
83
Property Type
Flat
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
26 Mar 2013
81
83
Total Floor Area
139 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
16
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 179 Princess Park Manor, Royal Drive
Date
15 Apr 2019
Current
Potential
56
72
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
15 Apr 2019
56
72
4 Dec 2008
81
82
Total Floor Area
62 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
46
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
FLAT 180, PRINCESS PARK MANOR
Date
11 Feb 2020
Current
Potential
60
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
11 Feb 2020
60
77
Total Floor Area
58 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 181, Princess Park Manor
Date
3 Sep 2023
Current
Potential
81
81
Property Type
Flat
Built Form
Mid-Terrace
Constructed
2003-2006
Certificate History
3 Sep 2023
81
81
Total Floor Area
76 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
18
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 181 Princess Park Manor, Royal Drive
Date
1 Sep 2013
Current
Potential
74
75
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
1 Sep 2013
74
75
15 Jul 2009
76
77
Total Floor Area
69 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
28
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 182 Princess Park Manor, Royal Drive
Date
29 Apr 2015
Current
Potential
52
63
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
before 1900
Certificate History
29 Apr 2015
52
63
6 Nov 2011
62
65
6 Nov 2011
74
74
Total Floor Area
87 sq m
Current CO2 Emissions Level
5.2
Potential CO2 Emissions Level
3.8
CO2 per sq m per Year
60
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
Flat 183 Princess Park Manor, Royal Drive
Date
6 Sep 2010
Current
Potential
76
78
Property Type
Flat
Built Form
N/A
Constructed
1991-1995
Certificate History
6 Sep 2010
76
78
Total Floor Area
239 sq m
Current CO2 Emissions Level
5.5
Potential CO2 Emissions Level
5.3
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 184 Princess Park Manor, Royal Drive
Date
5 Mar 2019
Current
Potential
76
78
Property Type
Flat
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
5 Mar 2019
76
78
14 Mar 2009
77
79
Total Floor Area
120 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
24
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 185 Princess Park Manor, Royal Drive
Date
18 Jun 2020
Current
Potential
74
77
Property Type
Flat
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
18 Jun 2020
74
77
Total Floor Area
81 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
28
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 186 Princess Park Manor, Royal Drive
Date
24 Jun 2018
Current
Potential
54
60
Property Type
Flat
Built Form
Detached
Constructed
1996-2002
Certificate History
24 Jun 2018
54
60
Total Floor Area
30 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
84
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 187, Princess Park Manor
Date
12 Jul 2022
Current
Potential
77
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
12 Jul 2022
77
82
Total Floor Area
70 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
47
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
0
Address
Flat 187 Princess Park Manor, Royal Drive
Date
21 Apr 2010
Current
Potential
75
78
Property Type
Flat
Built Form
Enclosed End-Terrace
Constructed
1996-2002
Certificate History
21 Apr 2010
75
78
Total Floor Area
70 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
32
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 188, Princess Park Manor
Date
17 Oct 2022
Current
Potential
74
81
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1900-1929
Certificate History
17 Oct 2022
74
81
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
68
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
Flat 189 Princess Park Manor, Royal Drive
Date
18 Apr 2010
Current
Potential
79
82
Property Type
Flat
Built Form
Detached
Constructed
1996-2002
Certificate History
18 Apr 2010
79
82
Total Floor Area
119 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
22
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 190 Princess Park Manor, Royal Drive
Date
26 Feb 2013
Current
Potential
69
74
Property Type
Flat
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
26 Feb 2013
69
74
Total Floor Area
97 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
2.7
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
FLAT 191, PRINCESS PARK MANOR
Date
1 Jul 2021
Current
Potential
56
64
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
1 Jul 2021
56
64
Total Floor Area
120 sq m
Current CO2 Emissions Level
6.0
Potential CO2 Emissions Level
4.9
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 193 Princess Park Manor, Royal Drive
Date
23 Mar 2018
Current
Potential
66
81
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
before 1900
Certificate History
23 Mar 2018
66
81
Total Floor Area
146 sq m
Current CO2 Emissions Level
5.2
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
Flat 194 Princess Park Manor, Royal Drive
Date
15 May 2012
Current
Potential
77
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
15 May 2012
77
82
Total Floor Area
173 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
22
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
2
Address
Flat 195, Princess Park Manor
Date
29 Feb 2024
Current
Potential
82
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
29 Feb 2024
82
82
Total Floor Area
174 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
16
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
Flat 196 Princess Park Manor, Royal Drive
Date
11 Apr 2015
Current
Potential
74
80
Property Type
Maisonette
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
11 Apr 2015
74
80
Total Floor Area
172 sq m
Current CO2 Emissions Level
4.3
Potential CO2 Emissions Level
3.4
CO2 per sq m per Year
25
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 197 Princess Park Manor, Royal Drive
Date
22 Apr 2010
Current
Potential
74
76
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
22 Apr 2010
74
76
1 Oct 2008
63
73
Total Floor Area
144 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
3.9
CO2 per sq m per Year
28
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 198 Princess Park Manor, Royal Drive
Date
9 Aug 2009
Current
Potential
59
71
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
9 Aug 2009
59
71
Total Floor Area
82 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
5
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.
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