PROPERTY ENERGY EFFICIENCY CERTIFICATE DETAILS
Claves Crescent, WELWYN GARDEN CITY, AL7 1WN
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 Claves Crescent, AL7 1WN 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 Claves Crescent, WELWYN GARDEN CITY, AL7 1WN
Period Covered:
2008 - 31 October 2024
Address
Inspection Date
Current
Potential
Property Type
Built Form
Constructed
Address
1 Claves Crescent
Date
12 Jul 2022
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
12 Jul 2022
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
10 Claves Crescent
Date
12 Jul 2022
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
12 Jul 2022
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
11 Claves Crescent
Date
5 Oct 2021
Current
Potential
85
94
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
5 Oct 2021
85
94
Total Floor Area
120 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
12 Claves Crescent
Date
12 Jul 2022
Current
Potential
83
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
12 Jul 2022
83
94
Total Floor Area
92 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
16
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
13 Claves Crescent
Date
8 Sep 2021
Current
Potential
84
95
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
8 Sep 2021
84
95
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
14 Claves Crescent
Date
29 Sep 2022
Current
Potential
84
96
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
29 Sep 2022
84
96
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
15 Claves Crescent
Date
14 Sep 2021
Current
Potential
85
96
Property Type
House
Built Form
Mid-Terrace
Constructed
2020
Certificate History
14 Sep 2021
85
96
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
16 Claves Crescent
Date
29 Sep 2022
Current
Potential
85
97
Property Type
House
Built Form
Mid-Terrace
Constructed
2020
Certificate History
29 Sep 2022
85
97
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.1
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
17 Claves Crescent
Date
14 Sep 2021
Current
Potential
84
95
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
14 Sep 2021
84
95
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
18 Claves Crescent
Date
28 Sep 2022
Current
Potential
84
95
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
28 Sep 2022
84
95
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
19 Claves Crescent
Date
8 Nov 2021
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
8 Nov 2021
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
2 Claves Crescent
Date
14 Feb 2022
Current
Potential
83
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
14 Feb 2022
83
94
Total Floor Area
92 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
16
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
20 Claves Crescent
Date
4 Oct 2022
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
4 Oct 2022
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
21 Claves Crescent
Date
2 Mar 2022
Current
Potential
84
96
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
2 Mar 2022
84
96
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
22 Claves Crescent
Date
19 Oct 2022
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
19 Oct 2022
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
23 Claves Crescent
Date
2 Mar 2022
Current
Potential
84
96
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
2 Mar 2022
84
96
Total Floor Area
86 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
24 Claves Crescent
Date
30 Nov 2022
Current
Potential
95
96
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
30 Nov 2022
95
96
30 Nov 2022
92
93
Total Floor Area
103 sq m
Current CO2 Emissions Level
0.4
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
4
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
25 Claves Crescent
Date
16 Mar 2022
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
16 Mar 2022
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
26 Claves Crescent
Date
15 Dec 2022
Current
Potential
95
96
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
15 Dec 2022
95
96
Total Floor Area
103 sq m
Current CO2 Emissions Level
0.4
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
4
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
27 Claves Crescent
Date
16 Mar 2022
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
16 Mar 2022
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
28 Claves Crescent
Date
15 Dec 2022
Current
Potential
95
96
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
15 Dec 2022
95
96
Total Floor Area
103 sq m
Current CO2 Emissions Level
0.4
Potential CO2 Emissions Level
0.2
CO2 per sq m per Year
4
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
29 Claves Crescent
Date
6 Apr 2022
Current
Potential
84
96
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
6 Apr 2022
84
96
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.1
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
3 Claves Crescent
Date
16 May 2021
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
16 May 2021
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
30 Claves Crescent
Date
30 Nov 2022
Current
Potential
93
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
30 Nov 2022
93
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
0.7
Potential CO2 Emissions Level
0.5
CO2 per sq m per Year
6
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
31 Claves Crescent
Date
6 Apr 2022
Current
Potential
83
96
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
6 Apr 2022
83
96
Total Floor Area
71 sq m
Current CO2 Emissions Level
1.1
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
32 Claves Crescent
Date
3 Oct 2022
Current
Potential
84
95
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
3 Oct 2022
84
95
Total Floor Area
92 sq m
Current CO2 Emissions Level
1.4
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
33 Claves Crescent
Date
10 Feb 2023
Current
Potential
89
90
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
10 Feb 2023
89
90
14 Feb 2022
83
94
Total Floor Area
103 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
0.8
CO2 per sq m per Year
10
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
35 Claves Crescent
Date
10 Feb 2023
Current
Potential
84
96
Property Type
House
Built Form
End-Terrace
Constructed
2019
Certificate History
10 Feb 2023
84
96
Total Floor Area
79 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
37 Claves Crescent
Date
24 Jan 2023
Current
Potential
85
97
Property Type
House
Built Form
Mid-Terrace
Constructed
2019
Certificate History
24 Jan 2023
85
97
Total Floor Area
79 sq m
Current CO2 Emissions Level
1.0
Potential CO2 Emissions Level
-0.1
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
39 Claves Crescent
Date
24 Jan 2023
Current
Potential
84
96
Property Type
House
Built Form
End-Terrace
Constructed
2019
Certificate History
24 Jan 2023
84
96
Total Floor Area
79 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
4 Claves Crescent
Date
24 May 2022
Current
Potential
85
95
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
24 May 2022
85
95
Total Floor Area
120 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
41 Claves Crescent
Date
20 Feb 2023
Current
Potential
84
96
Property Type
House
Built Form
Semi-Detached
Constructed
2019
Certificate History
20 Feb 2023
84
96
Total Floor Area
79 sq m
Current CO2 Emissions Level
1.2
Potential CO2 Emissions Level
0.0
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
43 Claves Crescent
Date
20 Feb 2023
Current
Potential
85
96
Property Type
House
Built Form
Semi-Detached
Constructed
2019
Certificate History
20 Feb 2023
85
96
Total Floor Area
93 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
45 Claves Crescent
Date
7 Mar 2023
Current
Potential
85
96
Property Type
House
Built Form
Semi-Detached
Constructed
2019
Certificate History
7 Mar 2023
85
96
Total Floor Area
93 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
47 Claves Crescent
Date
7 Mar 2023
Current
Potential
85
96
Property Type
House
Built Form
Semi-Detached
Constructed
2019
Certificate History
7 Mar 2023
85
96
Total Floor Area
93 sq m
Current CO2 Emissions Level
1.3
Potential CO2 Emissions Level
0.1
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
49 Claves Crescent
Date
16 Jun 2023
Current
Potential
85
95
Property Type
House
Built Form
Semi-Detached
Constructed
2019
Certificate History
16 Jun 2023
85
95
Total Floor Area
108 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.3
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
5 Claves Crescent
Date
26 May 2021
Current
Potential
85
95
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
26 May 2021
85
95
Total Floor Area
120 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
51 Claves Crescent
Date
16 Jun 2023
Current
Potential
85
94
Property Type
House
Built Form
Semi-Detached
Constructed
2019
Certificate History
16 Jun 2023
85
94
Total Floor Area
108 sq m
Current CO2 Emissions Level
1.5
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
6 Claves Crescent
Date
24 May 2022
Current
Potential
85
95
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
24 May 2022
85
95
Total Floor Area
120 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
13
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
7 Claves Crescent
Date
26 May 2021
Current
Potential
85
94
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
26 May 2021
85
94
Total Floor Area
120 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
8 Claves Crescent
Date
24 May 2022
Current
Potential
84
94
Property Type
House
Built Form
Detached
Constructed
2020
Certificate History
24 May 2022
84
94
Total Floor Area
110 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
15
Mains Gas Available
No
Habitable Rooms
0
Number of Extensions
0
Address
9 Claves Crescent
Date
5 Oct 2021
Current
Potential
85
94
Property Type
House
Built Form
Semi-Detached
Constructed
2020
Certificate History
5 Oct 2021
85
94
Total Floor Area
120 sq m
Current CO2 Emissions Level
1.6
Potential CO2 Emissions Level
0.4
CO2 per sq m per Year
14
Mains Gas Available
No
Habitable Rooms
0
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.