PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
William Street, HELENSBURGH, G84 8BJ
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 William Street, G84 8BJ 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 William Street, HELENSBURGH, G84 8BJ
Period Covered:
2012 - 30 September 2023
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
17 WILLIAM STREET
Date
13 Mar 2018
Current
Potential
60
76
Property Type
Flat
Built Form
Detached
Constructed
before 1919
Certificate History
13 Mar 2018
60
76
Total Floor Area
70 sq m
Current CO2 Emissions Level
4.3
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
62
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
26 WILLIAM STREET
Date
30 Jun 2019
Current
Potential
57
80
Property Type
Flat
Built Form
Detached
Constructed
before 1919
Certificate History
30 Jun 2019
57
80
1 Jul 2019
57
80
29 Jun 2019
57
80
Total Floor Area
69 sq m
Current CO2 Emissions Level
4.7
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
67
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
0
Address
27 WILLIAM STREET
Date
20 Oct 2014
Current
Potential
63
74
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
20 Oct 2014
63
74
21 Oct 2014
63
74
19 Oct 2014
63
74
Total Floor Area
52 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
0.9
CO2 per sq m per Year
53
Mains Gas Available
Yes
Habitable Rooms
2
Number of Extensions
0
Address
28 WILLIAM STREET
Date
6 Feb 2015
Current
Potential
59
75
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
6 Feb 2015
59
75
Total Floor Area
31 sq m
Current CO2 Emissions Level
2.7
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
89
Mains Gas Available
No
Habitable Rooms
1
Number of Extensions
0
Address
30 WILLIAM STREET
Date
25 May 2023
Current
Potential
63
77
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
25 May 2023
63
77
26 May 2023
63
77
3 Aug 2019
64
77
Total Floor Area
37 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.3
CO2 per sq m per Year
68
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
31 WILLIAM STREET
Date
19 Dec 2022
Current
Potential
74
77
Property Type
Flat
Built Form
Detached
Constructed
before 1919
Certificate History
19 Dec 2022
74
77
22 Dec 2021
70
76
Total Floor Area
85 sq m
Current CO2 Emissions Level
3.1
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
36
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
1
Address
32 WILLIAM STREET
Date
18 Feb 2020
Current
Potential
57
83
Property Type
Bungalow
Built Form
Detached
Constructed
1965-1975
Certificate History
18 Feb 2020
57
83
Total Floor Area
74 sq m
Current CO2 Emissions Level
5.1
Potential CO2 Emissions Level
3.0
CO2 per sq m per Year
69
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
1
Address
33 WILLIAM STREET
Date
25 Oct 2023
Current
Potential
61
70
Property Type
Flat
Built Form
Detached
Constructed
before 1919
Certificate History
25 Oct 2023
61
70
26 Oct 2023
61
70
19 Jul 2021
63
74
20 Jul 2021
63
74
Total Floor Area
73 sq m
Current CO2 Emissions Level
4.0
Potential CO2 Emissions Level
1.1
CO2 per sq m per Year
55
Mains Gas Available
No
Habitable Rooms
5
Number of Extensions
1
Address
34A WILLIAM STREET
Date
29 Jul 2015
Current
Potential
35
45
Property Type
House
Built Form
Detached
Constructed
1919-1929
Certificate History
29 Jul 2015
35
45
28 Jul 2015
35
45
27 Jul 2015
35
45
Total Floor Area
148 sq m
Current CO2 Emissions Level
12.0
Potential CO2 Emissions Level
2.0
CO2 per sq m per Year
80
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
0
Address
34B WILLIAM STREET
Date
16 Jul 2020
Current
Potential
57
76
Property Type
Flat
Built Form
Detached
Constructed
before 1919
Certificate History
16 Jul 2020
57
76
17 Jul 2020
57
76
15 Jul 2020
57
76
Total Floor Area
79 sq m
Current CO2 Emissions Level
5.1
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
65
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
35 WILLIAM STREET
Date
5 Jul 2023
Current
Potential
57
81
Property Type
House
Built Form
Detached
Constructed
before 1919
Certificate History
5 Jul 2023
57
81
8 May 2024
54
80
6 Jul 2023
57
81
15 Jul 2013
46
80
Total Floor Area
172 sq m
Current CO2 Emissions Level
9.8
Potential CO2 Emissions Level
5.0
CO2 per sq m per Year
57
Mains Gas Available
No
Habitable Rooms
9
Number of Extensions
3
Address
37 WILLIAM STREET
Date
5 Aug 2020
Current
Potential
66
94
Property Type
Bungalow
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
5 Aug 2020
66
94
6 Aug 2020
66
94
4 Aug 2020
66
94
Total Floor Area
24 sq m
Current CO2 Emissions Level
1.8
Potential CO2 Emissions Level
1.5
CO2 per sq m per Year
74
Mains Gas Available
No
Habitable Rooms
1
Number of Extensions
0
Address
38 WILLIAM STREET
Date
19 Feb 2024
Current
Potential
57
84
Property Type
House
Built Form
Detached
Constructed
before 1919
Certificate History
19 Feb 2024
57
84
Total Floor Area
218 sq m
Current CO2 Emissions Level
12.0
Potential CO2 Emissions Level
7.1
CO2 per sq m per Year
57
Mains Gas Available
No
Habitable Rooms
8
Number of Extensions
1
Address
39 WILLIAM STREET
Date
19 Jul 2024
Current
Potential
64
85
Property Type
House
Built Form
Mid-Terrace
Constructed
before 1919
Certificate History
19 Jul 2024
64
85
Total Floor Area
170 sq m
Current CO2 Emissions Level
8.3
Potential CO2 Emissions Level
4.6
CO2 per sq m per Year
49
Mains Gas Available
No
Habitable Rooms
6
Number of Extensions
0
Address
FLAT 1/1 , 25 WILLIAM STREET
Date
27 Jun 2016
Current
Potential
55
74
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
27 Jun 2016
55
74
26 Jun 2016
55
74
25 Jun 2016
55
74
Total Floor Area
112 sq m
Current CO2 Emissions Level
7.1
Potential CO2 Emissions Level
3.3
CO2 per sq m per Year
63
Mains Gas Available
No
Habitable Rooms
4
Number of Extensions
1
Address
FLAT 1/1 , 34 WILLIAM STREET
Date
21 Feb 2017
Current
Potential
62
81
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
21 Feb 2017
62
81
Total Floor Area
77 sq m
Current CO2 Emissions Level
4.4
Potential CO2 Emissions Level
2.6
CO2 per sq m per Year
57
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
FLAT 1/2 , 25 WILLIAM STREET
Date
5 Oct 2022
Current
Potential
64
80
Property Type
Flat
Built Form
Semi-Detached
Constructed
1919-1929
Certificate History
5 Oct 2022
64
80
6 Oct 2022
64
80
10 Dec 2019
65
78
4 Oct 2022
64
80
Total Floor Area
39 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
1.4
CO2 per sq m per Year
65
Mains Gas Available
No
Habitable Rooms
2
Number of Extensions
0
Address
FLAT 1/2 , 34 WILLIAM STREET
Date
19 May 2014
Current
Potential
58
81
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
19 May 2014
58
81
18 May 2014
58
81
17 May 2014
58
81
Total Floor Area
78 sq m
Current CO2 Emissions Level
4.3
Potential CO2 Emissions Level
2.8
CO2 per sq m per Year
55
Mains Gas Available
Yes
Habitable Rooms
3
Number of Extensions
0
Address
FLAT 2/1 , 34 WILLIAM STREET
Date
5 Jul 2022
Current
Potential
60
75
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
5 Jul 2022
60
75
6 Jul 2022
60
75
4 Jul 2022
60
75
Total Floor Area
73 sq m
Current CO2 Emissions Level
4.1
Potential CO2 Emissions Level
1.7
CO2 per sq m per Year
57
Mains Gas Available
No
Habitable Rooms
3
Number of Extensions
0
Address
FLAT GROUND/1 , 25 WILLIAM STREET
Date
1 May 2014
Current
Potential
62
69
Property Type
Flat
Built Form
Semi-Detached
Constructed
before 1919
Certificate History
1 May 2014
62
69
30 Apr 2014
62
69
29 Apr 2014
62
69
Total Floor Area
41 sq m
Current CO2 Emissions Level
2.5
Potential CO2 Emissions Level
0.6
CO2 per sq m per Year
61
Mains Gas Available
Yes
Habitable Rooms
2
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.