Presentacin de PowerPoint

1
Utilities, building affordability Michael
Mobbs
NCOSS Shelter NSW Conference, Sydney 2
November, 2004
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
2
Atmospheric CO2
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
3
Four sustainable projects a subdivision, new
house, renovation and a block of units They show

• A saving of over 10,000/lot on utilities
  costs
• Infrastructure costs 63,250 ie gt one
  third cost of a house / Living gt 3000 (aircon)
• Sustainable Infr costs 21,5000 / Living
  lt500
• The barriers to efficient land housing
  development

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
4
The projects show (cont) Project 1 - New house -
An efficiently designed built 2-bedroom house
with study has

• A bulding cost of 80,000
• A utilities cost of 11000 for energy, water
  and sewage (on site systems)
• Electricity water bills of lt300/annum for 2
  people
• Costs include the sustainable energy, water and
  recycled water systems

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
5
Project 2 A Sustainable Renovation Project
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
6
Sustainable Renovation in Dense Urban Area
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
7
After the renovation, the house looks and works
the same as it did before otherwise it could not
be easily sold
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
8
What did not change?

• Changes do not change the way the lights are
  used, water is drunk, toilet is flushed
• No training needed
• Local plumbers electricians did the work
• All products are available in Australia

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
9
What did it change? Water System

• Catches rainwater from the roof
• Stores it for drinking, cooking, showers,
  dishwashing hot water

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
10
New timber floors in the living room, kitchen
dining room are Flooded Gum cut from regrowth
forest in NSW. They are finished with natural
timber sealant
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
11
Renovation retrofit and living costs
Retrofit 1996 48,000 2004 lt 20,000 Living
costs before and after 1996 2000 water,
energy 2004 300 water, energy
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
12
Local trades install locally made products
The Smarfo gutter 15 months after it was
installed. The gutters are cleaned by the wind,
not the residents. It is an enclosed gutter
that excludes leaves and debris
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
13
Residential Unit Project

• 32 two bedroom residential unit complex
• Approval from Qld EPA local council
• Project aimed at investor tourist market
• 28 units sold off plan at prices x 3 that
  previously achieved

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
14
The Residential Unit Project (cont.)

• All water harvested on-site, all sewage reused
  on site
• No headworks charges
• No water or sewage rates
• On-site costs roughly equal headworks charges

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
15
Barriers to and facts about sustainable
infrastructure projects

• Efficiently sustainably serviced land can
  be provided for 30 less per lot than
  unsustainable land development costs
• Educating council staff councillors,
  negotiating red tape can increase approval
  times for sustainable subdivisions
• Inefficient rules, design, construction
  practices add over 30 to each subdivided lot

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
16
Subdivision Cost Compared - Qld
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
17
Barriers to affordable Housing

• Unsustainable Council and Government water
  businesses monopolise water service
  infrastructure, community facilities
• Government monopolies use rule-making powers
  to prevent competition from private sector
• Government monopolies are high water users and
  polluters of water and air
• Inefficient design, pricing and construction
  practices inhibit sustainable housing

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
18
Project Home Costs for Sydney Subdivision, 2004 -
Typical, unsustainable, NW Sector
Build cost of three bedroom       Terrace house
165,000 GSThouse                              
        Stand alone 192,000 GST         Size
of house                            Terrace house
150 SQM
                  Stand alone 175 SQMSize of
lot                                 Terrace house
375 to 480 SQM                                   
            Stand alone 480 to 700
SQMInfrastructure costs 63,250 ie gt one
third cost of a house / Living gt 3000
(aircon) Sustainable Infr costs 21,5000 /
lt500
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
19
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
20
Electricity used by Sydney Water and Sewage
services, per megalite or water delivered or
sewage treated, 1993/94 to 2000/01
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
21
Councils Greenhouse Pollution
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
22
Electricity used by Sydney Water Systems Vs. On
site Rainwater Wastewater Systems
Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au
23

• Sydney Water pumps water and sewage along its
  20,000 kms of mains pipes using electricity.
• On top of that, there's as much piping within
  each of Sydney's 1 million house lots.
• Each day Sydney consumes over 1,300 megalitres
  of water, requiring 400,000kWh of electricity,
  producing over 350 tonnes of greenhouse gas
  emissions (BASIX does not count this
  government-made pollution, probably because its
  written with the latest update of the ancient
  computer script, He Who Writes the Program
  Controls the Drips).
• Annually, this amounts to approximately 130,000
  tonnes.
• If all households in Sydney harvested
  rainwater, this figure would drop below 10,000
  tonnes a 90 per cent reduction.
• Mains water demand (and thus stormwater
  run-off) would drop similarly by over 90 per
  cent.
• Rainwater tank pumps use less energy and are
  more efficient.

Michael Mobbs, Sustainable Projects Pty Ltd,
www.sustainablehouse.com.au