- Often more expensive as old buildings have to be cleared and made free of pollution.
- Often surrounded by rundown areas, so doesnt appeal to more wealthy people as residential locations.
- Higher pollutio levels so less healthy.
- May not have good access to modern roads.
- Reduces the loss of countryside.
- helps to revive old and disused urban areas.
- Services such as water, gas, electricity and sewage are already in place.
- Located nearer to main areas of employment so commuting is reduced.
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- Valuable farm/recreational space lost.
- Attractive scenery lost.
- Wildlife and their habitats are disturbed or lost.
- Development causes noise and light pollution in the surrounding countryside.
- Encourages suburban sprawl.
- Relatively cheap and rates of house building are faster.
- The layout is not hampered by previous development so can easily be made efficient and pleasant.
- The environment is healthier.
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