Sadly the future is likely to hold a higher degree of standardisation as unique design will become increasingly the province of the wealthy, talented or the unhinged

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Leaving aside the issue of worlds requiring special methods due to atmospheric or other climatic anomolies, lets take a quick look at housing development in the UK.
Over 90% of all house building in the UK is by developers, many of whom are multinational concerns that have one over riding aspiration - to make money.
For this reason they build for the lowest cost possible for their standard of accommodation and reuse as much as possible in terms of the design. They will, for example, have perhaps 10 or so standard house types which have been pared down to the bone. I have plans showing a 2 floor 2 bed house, designed to be terraced unitswhere the accommodation consists of 58sq m 7.6m by 3.6m (aprx). Another plan for a one bed flat occupies 49sq m measuring 5.6m by 9.6m although there is a garage underneath which is not included in this area. These are traditional build and include full bathrooms - no modular fold up furniture for mutli use of spaces.
They will put as many units as they can in a given space (the current drive for reuse of derelict urban space in the UK is leading to a massive increase in the number of flats being built but with little or no increase in the number of family houses).
Extrapolating this to the future and what can we expect? On any moderately populated world mass housing will be crammed in cheek by jowel, often without the full requiste support services (doctors surgeries, pre-school centres etc since the developer paid a Section 106 contribution for these but the Planning Authority hasn't implemented it yet as it waits for the pot to be topped up by other developers).
Modular low and mid rise structures. Many budget hotels are already on a system akin to this where a rc frame is constructed and the bedrooms essentially plug in. Shortage of trained craftsmen on site leads to a greater use of prefabricated factory construction as in this way there is a greater degree of control over the qulity, finish, shape and size.
There are companies which can offer modular kitchens and bathrooms and these often feature in new student accommodation (goto
www.spacesavers.co.uk). Space will continue to be sacrificed for density of development, expect bathrooms to be reduced and consist of showers not baths, kitchens will reduce as multi purpose microwaves repalce full ovens and hobs. Storage will be at a premium, to reduce construction costs there will be no alcoves or odd shaped walls to convert to cupboards or nooks.
Housing will become very bland, efficient but sterile. Technology will be there but probably not at the point of first purchase, requiring the first or subsequent owners to retrofit. For example today a house will have one or more phone points depending on its size and target market. Usually, however this won't include broadband. A house may have one or more TV antenna points, but these are unlikey to allow distributed cable or satellite viewing and very few houses yet have standard Cat5 networking, and that can be a real bitch to retrofit if it's wired as I've found out.
With flats or dwellings with a communally owned spacewatch out for the management company's charges. As I understand it the management company in the UK cannot go broke, if the costs of maintaining the communal areas exceeds revenue it simply recovers the deficit from the residents even if this is over and above the regular management levies. There were cases of unscrupulous developers coverting a large house to a number of flats for as little as possible and at the height of the market they would sell these getting residents who under the terms of the lease (flats can only be owned leasehold) the management company would thencomplete works to the communal areas and the residents would in effect be paying for part of the cost of the conversion.
I seem to have rambled but I think that unless there are special conditions (and large sums of personal wealth can be considered a special factor!) then the bulk of people on moderatley populated worlds are going to find themselves living in standardised boxes with the absolute minimum space at the highest price the market would bare, working to repay the mortgage, insurances required by the lender, endowment premiums to protect the capital borrowed, and management company charges whilst trying to retrofit all of the gadgets a gizmos needed to make the place actually useful whilst keeping body and soul together.