PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Christchurch Close, LONDON, SW19 2NZ
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 Christchurch Close, SW19 2NZ 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 Christchurch Close, LONDON, SW19 2NZ
Period Covered:
2008 - 31 January 2025
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 BURNHAM COURT, 1A CHRISTCHURCH CLOSE
Date
12 Feb 2021
Current
Potential
61
71
Property Type
Flat
Built Form
Semi-Detached
Constructed
1976-1982
Certificate History
12 Feb 2021
61
71
Total Floor Area
47 sq m
Current CO2 Emissions Level
3.7
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
80
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
1 Wimbourne Court, Christchurch Close
Date
2 Nov 2023
Current
Potential
75
77
Property Type
Flat
Built Form
Semi-Detached
Constructed
1983-1990
Certificate History
2 Nov 2023
75
77
Total Floor Area
49 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
10 Wimbourne Court, Christchurch Close
Date
3 Dec 2023
Current
Potential
85
85
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
3 Dec 2023
85
85
30 Mar 2014
81
83
30 Mar 2014
77
77
Total Floor Area
48 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
30
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
11 Wimbourne Court, Christchurch Close
Date
4 Apr 2017
Current
Potential
54
81
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
4 Apr 2017
54
81
Total Floor Area
52 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
51
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
13 Wimbourne Court, Christchurch Close
Date
28 Nov 2023
Current
Potential
43
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1950-1966
Certificate History
28 Nov 2023
43
77
7 Feb 2013
68
78
Total Floor Area
47 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
65
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
14 Wimbourne Court, Christchurch Close
Date
3 Mar 2025
Current
Potential
75
75
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1983-1990
Certificate History
3 Mar 2025
75
75
17 Nov 2011
75
78
Total Floor Area
48 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
15 Wimbourne Court, Christchurch Close
Date
24 Apr 2024
Current
Potential
75
77
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1967-1975
Certificate History
24 Apr 2024
75
77
Total Floor Area
48 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
16 Wimbourne Court, Christchurch Close
Date
10 Aug 2021
Current
Potential
67
76
Property Type
Flat
Built Form
Semi-Detached
Constructed
1976-1982
Certificate History
10 Aug 2021
67
76
11 May 2010
72
75
11 May 2010
70
75
Total Floor Area
43 sq m
Current CO2 Emissions Level
1.9
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
17 Christchurch Close
Date
23 Aug 2024
Current
Potential
79
80
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1976-1982
Certificate History
23 Aug 2024
79
80
Total Floor Area
46 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
22
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
17 Wimbourne Court, Christchurch Close
Date
2 Jul 2018
Current
Potential
54
79
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1976-1982
Certificate History
2 Jul 2018
54
79
Total Floor Area
51 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
51
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
18 Christchurch Close
Date
26 Sep 2019
Current
Potential
70
74
Property Type
Flat
Built Form
End-Terrace
Constructed
1967-1975
Certificate History
26 Sep 2019
70
74
Total Floor Area
48 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
18 Wimbourne Court, Christchurch Close
Date
10 Sep 2009
Current
Potential
77
83
Property Type
Flat
Built Form
End-Terrace
Constructed
1976-1982
Certificate History
10 Sep 2009
77
83
Total Floor Area
48 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
36
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
19 Christchurch Close
Date
14 Mar 2012
Current
Potential
44
49
Property Type
House
Built Form
End-Terrace
Constructed
1950-1966
Certificate History
14 Mar 2012
44
49
Total Floor Area
84 sq m
Current CO2 Emissions Level
7.2
Potential CO2 Emissions Level
6.6
CO2 per sq m per Year
79
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
2 Christchurch Close
Date
15 Jun 2020
Current
Potential
72
88
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
15 Jun 2020
72
88
Total Floor Area
80 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
27
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
2 Wimbourne Court, Christchurch Close
Date
25 Apr 2024
Current
Potential
78
78
Property Type
Flat
Built Form
End-Terrace
Constructed
1967-1975
Certificate History
25 Apr 2024
78
78
3 May 2013
65
76
Total Floor Area
59 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
24
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
20 Christchurch Close
Date
2 Sep 2010
Current
Potential
61
71
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
2 Sep 2010
61
71
Total Floor Area
76 sq m
Current CO2 Emissions Level
3.8
Potential CO2 Emissions Level
2.9
CO2 per sq m per Year
56
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
21 CHRISTCHURCH CLOSE, COLLIERS WOOD
Date
29 Mar 2021
Current
Potential
55
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
29 Mar 2021
55
85
Total Floor Area
77 sq m
Current CO2 Emissions Level
4.2
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
54
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
22 Christchurch Close
Date
4 Jun 2018
Current
Potential
66
87
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
4 Jun 2018
66
87
Total Floor Area
71 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
23 Christchurch Close
Date
18 Mar 2020
Current
Potential
67
85
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
18 Mar 2020
67
85
4 Feb 2010
68
71
Total Floor Area
73 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
1.0
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
24 Christchurch Close
Date
14 Aug 2016
Current
Potential
49
87
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
Certificate History
14 Aug 2016
49
87
Total Floor Area
71 sq m
Current CO2 Emissions Level
4.6
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
25 Christchurch Close
Date
22 Sep 2009
Current
Potential
54
69
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
Certificate History
22 Sep 2009
54
69
Total Floor Area
91 sq m
Current CO2 Emissions Level
4.5
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
50
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
27 Christchurch Close
Date
27 Sep 2009
Current
Potential
74
78
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
27 Sep 2009
74
78
Total Floor Area
85 sq m
Current CO2 Emissions Level
2.8
Potential CO2 Emissions Level
2.5
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
0
Address
27 CHRISTCHURCH CLOSE, COLLIERS WOOD
Date
27 Oct 2020
Current
Potential
52
80
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
27 Oct 2020
52
80
Total Floor Area
90 sq m
Current CO2 Emissions Level
5.1
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
57
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
28 Christchurch Close
Date
14 Jun 2025
Current
Potential
69
88
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
Certificate History
14 Jun 2025
69
88
10 Jan 2023
66
88
Total Floor Area
89 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
0.7
CO2 per sq m per Year
30
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
1
Address
3 Burham Court, Christchurch Close
Date
9 Mar 2017
Current
Potential
42
55
Property Type
Flat
Built Form
Semi-Detached
Constructed
1950-1966
Certificate History
9 Mar 2017
42
55
Total Floor Area
45 sq m
Current CO2 Emissions Level
5.6
Potential CO2 Emissions Level
4.5
CO2 per sq m per Year
125
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
3 Wimbourne Court, Christchurch Close
Date
19 Jan 2011
Current
Potential
70
73
Property Type
Flat
Built Form
Detached
Constructed
1983-1990
Certificate History
19 Jan 2011
70
73
Total Floor Area
46 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
57
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
30 Christchurch Close
Date
16 Oct 2010
Current
Potential
55
70
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
16 Oct 2010
55
70
Total Floor Area
72 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
3.1
CO2 per sq m per Year
65
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
0
Address
32 Christchurch Close
Date
14 May 2017
Current
Potential
67
83
Property Type
House
Built Form
End-Terrace
Constructed
1930-1949
Certificate History
14 May 2017
67
83
14 Feb 2014
40
76
Total Floor Area
120 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
34
Mains Gas Available
Yes
Habitable Rooms
6
Number of Extensions
1
Address
39 Christchurch Close
Date
16 Apr 2023
Current
Potential
75
75
Property Type
Flat
Built Form
Semi-Detached
Constructed
1930-1949
Certificate History
16 Apr 2023
75
75
31 Oct 2019
73
78
16 Apr 2009
79
80
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.9
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
26
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
1
Address
4 Burham Court, Christchurch Close
Date
20 Feb 2020
Current
Potential
66
78
Property Type
Flat
Built Form
Mid-Terrace
Constructed
1976-1982
Certificate History
20 Feb 2020
66
78
Total Floor Area
45 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
69
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
4 Christchurch Close
Date
20 Feb 2010
Current
Potential
53
61
Property Type
House
Built Form
Mid-Terrace
Constructed
1930-1949
Certificate History
20 Feb 2010
53
61
Total Floor Area
85 sq m
Current CO2 Emissions Level
5.4
Potential CO2 Emissions Level
4.5
CO2 per sq m per Year
63
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
41 Christchurch Close
Date
16 Jan 2018
Current
Potential
69
93
Property Type
House
Built Form
Enclosed Mid-Terrace
Constructed
1983-1990
Certificate History
16 Jan 2018
69
93
Total Floor Area
39 sq m
Current CO2 Emissions Level
1.7
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
44
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
42 Christchurch Close
Date
24 May 2017
Current
Potential
71
93
Property Type
House
Built Form
Enclosed Mid-Terrace
Constructed
1976-1982
Certificate History
24 May 2017
71
93
Total Floor Area
39 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
39
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
43 Christchurch Close
Date
29 Jun 2014
Current
Potential
72
93
Property Type
House
Built Form
Mid-Terrace
Constructed
1991-1995
Certificate History
29 Jun 2014
72
93
Total Floor Area
42 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
37
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
44 Christchurch Close
Date
7 Apr 2022
Current
Potential
69
90
Property Type
House
Built Form
Enclosed End-Terrace
Constructed
1976-1982
Certificate History
7 Apr 2022
69
90
Total Floor Area
50 sq m
Current CO2 Emissions Level
2.0
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
40
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
5 Christchurch Close
Date
14 Apr 2009
Current
Potential
68
74
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
14 Apr 2009
68
74
Total Floor Area
72 sq m
Current CO2 Emissions Level
3.2
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
45
Mains Gas Available
Yes
Habitable Rooms
5
Number of Extensions
0
Address
6 Christchurch Close
Date
30 Jan 2024
Current
Potential
63
86
Property Type
House
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
30 Jan 2024
63
86
Total Floor Area
83 sq m
Current CO2 Emissions Level
3.6
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
43
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
6 Wimbourne Court, Christchurch Close
Date
4 Nov 2008
Current
Potential
72
78
Property Type
Flat
Built Form
Detached
Constructed
1976-1982
Certificate History
4 Nov 2008
72
78
Total Floor Area
46 sq m
Current CO2 Emissions Level
2.3
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
49
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
7 Christchurch Close
Date
29 Mar 2012
Current
Potential
72
77
Property Type
Flat
Built Form
End-Terrace
Constructed
1950-1966
Certificate History
29 Mar 2012
72
77
Total Floor Area
66 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
1.6
CO2 per sq m per Year
33
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
2
Address
7 Wimbourne Court, Christchurch Close
Date
7 Jul 2009
Current
Potential
71
74
Property Type
Flat
Built Form
Detached
Constructed
1976-1982
Certificate History
7 Jul 2009
71
74
Total Floor Area
45 sq m
Current CO2 Emissions Level
2.4
Potential CO2 Emissions Level
2.3
CO2 per sq m per Year
53
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
7a Christchurch Close
Date
7 Apr 2025
Current
Potential
86
87
Property Type
House
Built Form
Detached
Constructed
2024
Certificate History
7 Apr 2025
86
87
Total Floor Area
79 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
8 Wimbourne Court, Christchurch Close
Date
19 Jan 2011
Current
Potential
69
73
Property Type
Flat
Built Form
Detached
Constructed
1983-1990
Certificate History
19 Jan 2011
69
73
Total Floor Area
46 sq m
Current CO2 Emissions Level
2.6
Potential CO2 Emissions Level
2.4
CO2 per sq m per Year
57
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
9 Christchurch Close
Date
30 Jun 2022
Current
Potential
66
81
Property Type
House
Built Form
Mid-Terrace
Constructed
1900-1929
Certificate History
30 Jun 2022
66
81
Total Floor Area
87 sq m
Current CO2 Emissions Level
3.3
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
38
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
Address
9 Wimbourne Court, Christchurch Close
Date
14 Apr 2010
Current
Potential
73
75
Property Type
Flat
Built Form
Detached
Constructed
1976-1982
Certificate History
14 Apr 2010
73
75
Total Floor Area
46 sq m
Current CO2 Emissions Level
2.2
Potential CO2 Emissions Level
2.1
CO2 per sq m per Year
48
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
Flat 1, 24 Christchurch Close
Date
9 Sep 2018
Current
Potential
76
77
Property Type
Flat
Built Form
Semi-Detached
Constructed
1930-1949
Certificate History
9 Sep 2018
76
77
Total Floor Area
83 sq m
Current CO2 Emissions Level
2.1
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
25
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
2
Address
Flat 1, Sycamore House
Date
9 Aug 2020
Current
Potential
82
82
Property Type
Flat
Built Form
Semi-Detached
Constructed
N/A
Certificate History
9 Aug 2020
82
82
Total Floor Area
92 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
16
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
Flat 2, 24 Christchurch Close
Date
9 Sep 2018
Current
Potential
75
79
Property Type
Flat
Built Form
Semi-Detached
Constructed
1930-1949
Certificate History
9 Sep 2018
75
79
Total Floor Area
51 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
2
Address
Flat 2 Sycamore House, 19, Christchurch Close
Date
9 Aug 2020
Current
Potential
83
83
Property Type
Maisonette
Built Form
Semi-Detached
Constructed
N/A
Certificate History
9 Aug 2020
83
83
Total Floor Area
94 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
Flat 3, 24 Christchurch Close
Date
9 Sep 2018
Current
Potential
76
76
Property Type
Flat
Built Form
Semi-Detached
Constructed
1930-1949
Certificate History
9 Sep 2018
76
76
Total Floor Area
41 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
1.2
CO2 per sq m per Year
29
Mains Gas Available
Yes
Habitable Rooms
1
Number of Extensions
2
Address
Ground Floor Flat, 7 Christchurch Close
Date
12 Jul 2017
Current
Potential
56
74
Property Type
Flat
Built Form
End-Terrace
Constructed
1900-1929
Certificate History
12 Jul 2017
56
74
31 Mar 2009
66
75
Total Floor Area
68 sq m
Current CO2 Emissions Level
3.9
Potential CO2 Emissions Level
1.9
CO2 per sq m per Year
57
Mains Gas Available
Yes
Habitable Rooms
4
Number of Extensions
1
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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