Don’t know if it helps, I used to live in a house in Buckinghamshire and absolutely hated it. There was no garage parking and it had to be off road, so I would just pull my motorcycle up my lawn in front of my patio window.
Anywhere you have a visible bike, there is a high chance of an opportunistic tamper. You can at least install ground anchors; fixing points in a house. In a flat, it’s harder.
Personally, I just don’t like living in houses. Strangers can easily work out whether you are in or out and the security is not as good as a modern flat. I do like living high above everyone (so I can look down on them j/k ) but underground car parks are great if you have a fixing point for a motorcycle. Even if you have a garden, it’s hard to keep secure; any white van man can easily pry doors off and lift it into a van. All your neighbours will get to know you as “the biker with the loud exhausts” when you roll in at 3am, and out at 6am lol.
Problems with flats - your insurance may reject a flat’s parking pound for a motorcycle, especially if it’s a sportsbike; you may have to install a motorcycle shed on your actual allocated parking slot, however application to the landlord to check this is possible first. Good things; large tow trucks and vans cannot get easy access to private parking pounds, and it means that thieves have to find a way to severe your bike locks from the anchoring point; potentially pass CCTV and get caught … it’s much harder logistically to steal this way, especially if the height of the carpark blocks anything over 6ft. Also, you have your own space and privacy: for 4 years, my next door neighbour never realised I rode a motorcycle 
Anyone on here living in the ‘shires and keeping their bike parked in a block of flats’ communal car-park? If so, has security or people messing with your bike been an issue at all? I’m swaying towards an apartment as there’s some reasonably nice ones for my budget, but I’d stretch to a house in perhaps a less desirable area if it comes with a bit of garden where I can park the bike out of the way of prying eyes.
Overall, it’s a decision based on the lifestyle you want to have. Nothing would be as depressing as living in suburbian Brookside with middle class folk playing monopoly on Sundays for me. I like the inner city, for reasons people hate it 
Well, that’s how long the string is for me and others’ longer - their mileage may vary because they take longer to get in from suburbia to London lol. Whereas living in a flat in London, you can get out of London easier for a better weekend lifestyle, balanced with the working commuting week - especially come bad inclinement weather - nothings as hairy as having to ride through thicket hailstorm and black ice taking silly risks just to get to work on a weekday.
Appreciate it’s a bit of a ‘How long’s a piece of string’ type question, but would be interested in any comments. 
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