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Review of existing energy retrofit decision tools for homeowners.

Seddiki, Mohammed; Bennadji, Amar; Laing, Richard; Gray, David; Alabid, Jamal M.


Amar Bennadji

Richard Laing

Jamal M. Alabid


Energy retrofit tools are considered by many countries as one of the strongest incentives to encourage homeowners to invest in energy renovation. These tools help homeowners to get an initial overview of suitable retrofit measures. Although a large number of energy retrofit tools have been developed to inspire and educate homeowners, energy renovation by individual homeowners is still lagging and the impact of current tools is insufficient as awareness and information issues remain one of main obstacles that hinder the uptake of energy retrofitting schemes. This research extends the current knowledge by analysing the characteristics of 19 tools from 10 different countries. The selected tools were analysed in terms of energy calculation methods, features, generation and range of retrofit measures, evaluation criteria, and indications on financial support. The review indicates that: (1) most toolkits use empirical data-driven methods, pre-simulated databases, and normative calculation methods; (2) few tools generate long-term integrated renovation packages; (3) technological, social, and aesthetic aspects are rarely taken into consideration; (4) the generation of funding options varies between the existing tools; (5) most toolkits do not suggest specific retrofit solutions adapted to traditional buildings; and (6) preferences of homeowners in terms of evaluation criteria are often neglected.


SEDDIKI, M., BENNADJI, A., LAING, R., GRAY, D. and ALABID, J.M. 2021. Review of existing energy retrofit decision for homeowners. Sustainability [online], 13(18), article 10189. Available from:

Journal Article Type Article
Acceptance Date Sep 8, 2021
Online Publication Date Sep 12, 2021
Publication Date Sep 30, 2021
Deposit Date Sep 24, 2021
Publicly Available Date Sep 24, 2021
Journal Sustainability
Electronic ISSN 2071-1050
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 13
Issue 18
Article Number 10189
Keywords Energy retrofit; Decision tools; Homeowners; Energy efficiency; Web-based applications; Energy calculations
Public URL


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