Sustainability Consulting

We are a small consultancy located in Richmond. 
We offer advice and support to clients in developing economical, sustainable buildings.

We specialise in...

Green Star

After 15 years of using the Green Star tools, we are experts.

We work with project teams and building owners to develop economical and marketable buildings with high sustainability values.


Karen Hovenga is a certified NABERS and CBD assessor.  We prepare energy audits of Offices and Hotels using NABERS.  We can also provide Building Energy Efficiency Certificates (BEEC) for buildings and tenancies to be sold or leased.


We prepare Sustainability Management Plans for Town Planning submissions.  Our focus is on identifying common construction practise and suggesting minor changes to achieve high sustainability outcomes with a minimum of effort or cost.

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Karen Hovenga

Karen Hovenga, the principal of Karen Hovenga, Sustainability Consulting, is a mechanical engineer with more than 15 years experience.  Karen is a NABERS Assessor, GreenStar Accredited Professional and Green Star Assessor.

From Karen's Blog

Site visit!

By Karen | June 21, 2019

This morning I went to a site visit at the new Country Road store in Chadstone.  I’m working on a volume certification process and the store is the first one targeting a 5 star Green Star Interiors. When I set up the meeting, I worked out that I could get there by bike and train, so this morning when it…

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Your windows are too big

By Karen | September 12, 2018

Last week I got one of those phone calls…”How quickly can you do a JV3 model?” Yep, no one had checked that the windows complied with the NCC and now they needed a building permit – today! I was pretty blunt and told them that I needed 2 weeks, but I also took a look at their drawings;  they had…

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That community open air stage!

By Karen | August 13, 2018

My community open air stage project is now live on Pick my Project.  If you live within 5km of my project, you can vote for it! Voting is quick and simple, and open until 5pm, Monday 17 September: Go to Pick My Project and sign in. Select your local community by entering your postcode. You can then browse the project ideas in…

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Sustainable Transport

We use bicycles to attend meetings and site visits. When longer distances are traveled we will use public transport to supplement the bike.