PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
High Road, LONDON, N15 4RQ
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 High Road, N15 4RQ 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 High Road, LONDON, N15 4RQ
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
Flat 1 Sycamore Gardens, 295, High Road
Date
30 Sep 2013
Current
Potential
67
75
Property Type
House
Built Form
End-Terrace
Constructed
before 1900
Certificate History
30 Sep 2013
67
75
26 Mar 2012
74
79
Total Floor Area
118 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
2
Address
Flat 11 Sycamore Gardens, 295, High Road
Date
23 Oct 2012
Current
Potential
71
79
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
23 Oct 2012
71
79
29 Feb 2012
63
68
Total Floor Area
55 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 13 Sycamore Gardens, 295, High Road
Date
21 Mar 2012
Current
Potential
73
77
Property Type
Maisonette
Built Form
N/A
Constructed
1900-1929
Certificate History
21 Mar 2012
73
77
Total Floor Area
137 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
Flat 14 Sycamore Gardens, 295, High Road
Date
16 Aug 2009
Current
Potential
64
71
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
16 Aug 2009
64
71
Total Floor Area
107 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
3.8
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 16 Sycamore Gardens, 295, High Road
Date
10 Jul 2019
Current
Potential
70
81
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1900
Certificate History
10 Jul 2019
70
81
Total Floor Area
59 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 17 Sycamore Gardens, 295, High Road
Date
8 Jun 2013
Current
Potential
69
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
8 Jun 2013
69
78
Total Floor Area
50 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 19, Sycamore Gardens
Date
24 Nov 2021
Current
Potential
80
83
Property Type
Flat
Built Form
Mid-Terrace
Constructed
2007-2011
Certificate History
24 Nov 2021
80
83
Total Floor Area
82 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
18
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 19 Sycamore Gardens, 295, High Road
Date
30 Jun 2010
Current
Potential
81
84
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
30 Jun 2010
81
84
Total Floor Area
76 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
24
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 2 Sycamore Gardens, 295, High Road
Date
26 Mar 2012
Current
Potential
75
80
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
26 Mar 2012
75
80
Total Floor Area
121 sq m
Current CO2 Emissions Level
3.0
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
25
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 28 Sycamore Gardens, 295, High Road
Date
15 Sep 2009
Current
Potential
61
66
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
15 Sep 2009
61
66
Total Floor Area
53 sq m
Current CO2 Emissions Level
3.4
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
64
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 3 Sycamore Gardens, 295, High Road
Date
14 May 2013
Current
Potential
63
75
Property Type
Maisonette
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
14 May 2013
63
75
Total Floor Area
126 sq m
Current CO2 Emissions Level
5.0
Potential CO2 Emissions Level
3.2
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 30 Sycamore Gardens, 295, High Road
Date
8 Nov 2013
Current
Potential
74
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
8 Nov 2013
74
82
Total Floor Area
61 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 31 Sycamore Gardens, 295, High Road
Date
18 Aug 2011
Current
Potential
57
58
Property Type
Flat
Built Form
Enclosed End-Terrace
Constructed
1900-1929
Certificate History
18 Aug 2011
57
58
Total Floor Area
66 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
3.7
CO2 per sq m per Year
57
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
Flat 33 Sycamore Gardens, 295, High Road
Date
3 Jun 2018
Current
Potential
63
75
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
3 Jun 2018
63
75
Total Floor Area
59 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
46
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
3
Address
Flat 37 Sycamore Gardens, 295, High Road
Date
14 May 2013
Current
Potential
79
83
Property Type
Maisonette
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
14 May 2013
79
83
Total Floor Area
112 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
20
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 38 Sycamore Gardens, 295, High Road
Date
31 Aug 2015
Current
Potential
62
76
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1930-1949
Certificate History
31 Aug 2015
62
76
Total Floor Area
53 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 39 Sycamore Gardens, 295, High Road
Date
2 Jul 2016
Current
Potential
65
78
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
2 Jul 2016
65
78
Total Floor Area
45 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
48
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 4 Sycamore Gardens, 295, High Road
Date
14 Mar 2013
Current
Potential
76
80
Property Type
Flat
Built Form
End-Terrace
Constructed
1996-2002
Certificate History
14 Mar 2013
76
80
20 Jan 2010
64
69
Total Floor Area
86 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
25
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 40, Sycamore Gardens
Date
13 Dec 2024
Current
Potential
75
81
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
13 Dec 2024
75
81
Total Floor Area
119 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
25
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
Flat 43, Sycamore Gardens
Date
23 Mar 2023
Current
Potential
59
66
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
23 Mar 2023
59
66
Total Floor Area
36 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 43 Sycamore Gardens, 295, High Road
Date
6 Nov 2012
Current
Potential
60
66
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
6 Nov 2012
60
66
Total Floor Area
43 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
58
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 44 Sycamore Gardens, 295, High Road
Date
3 Apr 2017
Current
Potential
49
67
Property Type
Flat
Built Form
End-Terrace
Constructed
before 1900
Certificate History
3 Apr 2017
49
67
Total Floor Area
40 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
83
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 45 Sycamore Gardens, 295, High Road
Date
20 Mar 2012
Current
Potential
74
78
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
20 Mar 2012
74
78
Total Floor Area
100 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 46 Sycamore Gardens, 295, High Road
Date
20 Mar 2012
Current
Potential
77
80
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
20 Mar 2012
77
80
26 May 2010
77
82
Total Floor Area
112 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 47 Sycamore Gardens, 295, High Road
Date
14 May 2013
Current
Potential
75
75
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
14 May 2013
75
75
Total Floor Area
112 sq m
Current CO2 Emissions Level
2.9
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
26
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 48 Sycamore Gardens, 295, High Road
Date
26 Mar 2012
Current
Potential
78
79
Property Type
Maisonette
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
26 Mar 2012
78
79
Total Floor Area
112 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
2.2
CO2 per sq m per Year
21
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
Flat 49 Sycamore Gardens, 295, High Road
Date
14 May 2013
Current
Potential
79
79
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
14 May 2013
79
79
8 Sep 2010
82
84
Total Floor Area
55 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 51 Sycamore Gardens, 295, High Road
Date
30 Sep 2013
Current
Potential
72
76
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
30 Sep 2013
72
76
3 Apr 2012
77
80
Total Floor Area
47 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
Flat 52 Sycamore Gardens, 295, High Road
Date
1 Sep 2013
Current
Potential
73
80
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1900-1929
Certificate History
1 Sep 2013
73
80
3 Apr 2012
76
81
Total Floor Area
43 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
35
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 53 Sycamore Gardens, 295, High Road
Date
3 Apr 2012
Current
Potential
75
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
3 Apr 2012
75
77
Total Floor Area
45 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 54, Sycamore Gardens
Date
20 Jan 2023
Current
Potential
74
79
Property Type
Flat
Built Form
Enclosed End-Terrace
Constructed
before 1900
Certificate History
20 Jan 2023
74
79
Total Floor Area
47 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
31
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 54 Sycamore Gardens, 295, High Road
Date
21 Nov 2013
Current
Potential
75
81
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
21 Nov 2013
75
81
3 Apr 2012
75
81
Total Floor Area
45 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 55 Sycamore Gardens, 295, High Road
Date
30 Sep 2013
Current
Potential
77
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
30 Sep 2013
77
77
26 Mar 2012
77
81
Total Floor Area
62 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
24
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 57 Sycamore Gardens, 295, High Road
Date
14 May 2013
Current
Potential
61
64
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
14 May 2013
61
64
Total Floor Area
48 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 58 Sycamore Gardens, 295, High Road
Date
7 Sep 2009
Current
Potential
78
82
Property Type
Flat
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
7 Sep 2009
78
82
Total Floor Area
20 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
59
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 59 Sycamore Gardens, 295, High Road
Date
14 May 2013
Current
Potential
62
62
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
14 May 2013
62
62
Total Floor Area
56 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 60 Sycamore Gardens, 295, High Road
Date
30 Sep 2013
Current
Potential
61
64
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
30 Sep 2013
61
64
20 Mar 2012
66
66
Total Floor Area
50 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
1
Address
Flat 61 Sycamore Gardens, 295, High Road
Date
26 Mar 2012
Current
Potential
75
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
before 1900
Certificate History
26 Mar 2012
75
77
1 Dec 2008
62
62
Total Floor Area
74 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
1.8
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 62 Sycamore Gardens, 295, High Road
Date
17 Sep 2014
Current
Potential
72
76
Property Type
Flat
Built Form
Enclosed Mid-Terrace
Constructed
1991-1995
Certificate History
17 Sep 2014
72
76
14 May 2013
56
65
Total Floor Area
54 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 63 Sycamore Gardens, 295, High Road
Date
14 May 2013
Current
Potential
60
66
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
14 May 2013
60
66
Total Floor Area
45 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
58
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
Flat 64, Sycamore Gardens
Date
17 Oct 2022
Current
Potential
75
78
Property Type
Flat
Built Form
Semi-Detached
Constructed
1983-1990
Certificate History
17 Oct 2022
75
78
Total Floor Area
67 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 65, Sycamore Gardens
Date
5 Apr 2023
Current
Potential
77
78
Property Type
Flat
Built Form
Semi-Detached
Constructed
1996-2002
Certificate History
5 Apr 2023
77
78
Total Floor Area
69 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
23
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
FLAT 69, SYCAMORE GARDENS
Date
9 Mar 2021
Current
Potential
83
83
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
9 Mar 2021
83
83
Total Floor Area
74 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 7 Sycamore Gardens, 295, High Road
Date
5 Dec 2009
Current
Potential
54
61
Property Type
Flat
Built Form
N/A
Constructed
1900-1929
Certificate History
5 Dec 2009
54
61
Total Floor Area
56 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
3.5
CO2 per sq m per Year
72
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 72 Sycamore Gardens, 295, High Road
Date
6 Apr 2010
Current
Potential
84
86
Property Type
Flat
Built Form
N/A
Constructed
1996-2002
Certificate History
6 Apr 2010
84
86
Total Floor Area
87 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
19
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
Flat 75 Sycamore Gardens, 295, High Road
Date
20 Apr 2013
Current
Potential
79
82
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
20 Apr 2013
79
82
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
21
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 79 Sycamore Gardens, 295, High Road
Date
8 Nov 2013
Current
Potential
77
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1996-2002
Certificate History
8 Nov 2013
77
78
Total Floor Area
46 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
Flat 8, Sycamore Gardens
Date
8 Oct 2024
Current
Potential
68
78
Property Type
Maisonette
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
8 Oct 2024
68
78
Total Floor Area
92 sq m
Current CO2 Emissions Level
3.2
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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