Reports

Rous Water Performance Report

The Rous Water report compares BASIX predicted water savings with actual water savings for dwellings in the Rous Water Service areas of Ballina, Byron, Lismore and Richmond Valley.

The report indicates BASIX is achieving its 40% water saving objective with an average saving based on metered water use of 48.6%

University of Canberra BASIX user survey

The University of Canberra has completed a study and produced a report Building professionals' and homeowners' perceptions of the NSW Building Sustainability Index (BASIX).

The study involved separate surveys of BASIX Thermal Comfort Assessors and other building professional users of BASIX, and of householders.

Overall, respondents considered BASIX has been effective in reducing residential energy and water consumption, but saw the need for some improvements.

If you wish to obtain a copy of the full report, please email This email address is being protected from spambots. You need JavaScript enabled to view it. and your request will be forwarded to the Study's Project Manager, Professor Patrick Zou of the University of Canberra.

Hunter Water: Water efficiency measures report

Hunter Water Corporation has released a report which analyses BASIX certificate trends from proposed single residential dwellings in Hunter Water's supply area. The report includes analysis of various site and dwelling characteristics, including block size, floor area and number of bedrooms as well as alternative water sources, end-use connections and nomination of water efficient fixtures as indicated on the BASIX certificates.

The report found an average BASIX water score of 43.5 (min. required is 40) for the proposed dwellings and an increasing trend in use of high rated water efficient fixtures.

The report is part of a BASIX Water Consumption Assessment Project which Hunter Water Corporation is conducting under a Data Sharing Agreement with the Department of Planning & Environment.

In a second stage of the Project, Hunter Water will compare predicted water consumption from BASIX scores with actual meter consumption data for dwellings in their sample.

BASIX Compliance Audit program

bcrThe regulation covering BASIX requires that all water and energy saving design measures and technologies listed on the BASIX certificate as building commitments must be marked on plans and other documentation that accompany either a development application (DA), application for a complying development certificate (CDC) or construction certificate (CC).

The purpose of this study is to monitor this issue – and to understand how BASIX certificate commitments' such as floor areas, landscaped areas, appliances, insulation and glazing, are recorded on plans and documents for assessment by consent and certifying authorities. DA, CDC and CC plans that fully mark and detail the design and fit-out of BASIX commitments, increase the standards for builders to construct a BASIX compliant home, and ensure the delivery of the Government's sustainability requirements for new residential development to reduce mains-potable water consumption, greenhouse gas emissions and perform in a thermally efficiency manner.

In this review, an independent consultant conducted a paper-based and desk-top review of over 100 single and dual occupancy development proposals and plans submitted to eleven participating councils - Marrickville, Penrith, Fairfield, The Hills, Parramatta, Blacktown, Shellharbour, Maitland, Orange, Lithgow, Camden. This compliance monitoring did not involve on-site visits of constructed homes.

The study also identified areas for additional support to councils and industry and a format for future compliance auditing.

  • The findings show that the current standard of submitted DA and CC documents and plans that reflect BASIX Certificate commitments is generally fair to good.
  • The quality of plan-marking of 'iconic' and high-scoring BASIX-Water and -Energy components, such as rainwater tanks and hot water systems, is high. However, Thermal Comfort design elements and other documentation required, particularly for developments using the 'Simulation' method, is somewhat lacking.
  • The NSW Department of Planning & Environment issued an update to the Thermal Comfort Protocol, effective from 1 May 2013, to improve consistency with recent changes to NatHERS Technical notes, and to clarify the standard for plan-marking requirements to all stakeholders – including Accredited Assessors, development proponents, and consent and certifying authorities assessing compliance against BASIX certificate commitments.
  • A number of leading exemplars by industry, consent and certifying authorities were flagged for potential promotion as case studies of best practice.
  • Findings showing lower compliance may also be attributed to some confusion around changing efficiency ratings and labelling standards, and general plan-marking practices beyond BASIX-related design measures and technologies.
  • In response to the findings, the Department will continue to engage with key stakeholders to resolve and to deliver on recommended actions, including developing improved on-line support and training, refining the single dwelling web-based tool and certificate, and future compliance monitoring studies with private certifying authorities.

BASIX outcomes - 5 year summary

This report summarise the outcomes of BASIX since introduction, from 2004 to 2009, in the form of a five year summary.

BASIX Cost benefit analysis

In 2009, the Department of Planning & Environment (then the Department of Planning) undertook with NERA Economic Consulting an evaluation of the performance of the BASIX policy since its inception, and estimate the future benefits of the scheme out to 2050. The analysis estimated that to 2050 new BASIX dwellings will generate a positive benefit to NSW of between $1.20 and $1.60 for every dollar spent complying with BASIX.

Co-generation demonstration project

The BASIX multi-unit residential co-generation demonstration project is an initiative of the NSW Department of Planning and Environment and involves partnership with residential development companies Lend Lease GPT and Mirvac. The aim of the project is to trial and showcase co-generation technology in high-density residential developments, focussing on energy consumption and greenhouse reduction, as well as cost effectiveness.

BASIX monitoring - Energy savings

This report looks at the results of a preliminary analysis of electricity consumption between 2007 and 2009 conducted by EnergyAustralia for a sample of new BASIX single dwellings in EnergyAustralia's electricity distribution area.

BASIX outcomes - Single dwelling

These reports summarise the commitments made at development application stage for single homes certified by BASIX for its first year of operation in Sydney (2004-05) and its first three years as a State-wide program (2005-08).

BASIX outcomes - Alteration and additions

altsThis report summarises the outcomes of the BASIX Alterations and Additions Tool to achieve sustainability commitments for significant works to existing residential buildings in NSW.

BASIX monitoring - Water savings

watersaveThis report prepared by Sydney Water looks at monitoring the water savings of occupied BASIX dwellings using   metered potable water consumption to determine whether dwellings are meeting their water reduction targets. Results show that BASIX dwellings are performing close to the 40% reduction target.