Apparently in many parts of the UK, homes that face each other at the rear are required to be built 21 metres apart, and you'll never guess the reason why this rule exists.
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So while this idea is somewhat outdated, do we really want to build housing that is so close together we feel crammed in like sardines.
@zleap @fabriek I think that feeling of being crammed is more based on the internal size of a dwelling, rather than its position relative to other dwellings.