Garage Bike storage

All my five bikes are now arranged around my bedroom, where I can see them. It is just too disappointing to keep going down to my garage and finding the door smashed in and bikes gone.

I have several ground anchors bolted to the garage walls and the bikes are secured to those with hefty motorcycle chains.

The best bike has 2 of both to itself and is bloody awkward to get at if the garage door is open, so if they've forced the door only part way open, that's another level of security.

And one sacrificial bike that isn't locked up - if they get something, they (hopefully) won't smash all the others up in anger!

Friend of mine installed steel gratings over the garage doors after he was raided and lost several bikes. When they came for the replacements, they tried to tear the roof off!

Based on the horror stories I hear from Bristol where, despite increasing the door security measures (usually up and over doors) with more bolts, padlocks etc, the thieves keep on coming, I'd throw good money at the door and get something that's properly secure.  Would still be worth securing the bikes in the garage but at least 'convenience' (ie ease of getting the bikes out) isn't compromised by excessive, long-winded security measures (multiple padlocks, bolts, chains etc).  In a burglary the financial loss is the 'tip of the iceburg'; it's the loss in time (police, insurance claims, tradesmen to fix things etc) and (previous) long-term investment in bike component upgrades etc that really gets you, not forgetting the paranoia that it'll happen again....when all you have is a new 'off the peg' bike with cheap tyres, rims, BB, saddle etc.  Kind of spend money to save money.

Why cut 6 ladder rungs twice when you can just cut the chain once

I have a long motor cycle chain threaded through a three section aluminium ladder that is bolted to the wall. they would have to cut through 6 rungs twice each to free the bikes, and then they would still have the chain to contend with. I also have two deadlocks on the door.

Yes, they could get the bikes if they really wanted, but it wouldn't be quick, easy or quiet.

Most up'n'over doors can be crowbar'd and bent out from the bottom corners, if necessary.  Generally speaking I'd look at fitting latch bolts in either corner, which helps mitigate.  If someone is determined - and doesn't mind making a noise - they will still get in though.

I hang them from J-hooks screwed into the rafters and park the car underneath.

I have installed one of those ground-anchored garage door protectors at the base of the up-and-over door.

I'd like to install a better door, but the garage is rented.

Could look at pragmasis ground anchors and chains.  Not cheap but seem pretty solid.  I have these in my (stone) shed as additional security.

I have used an Abus wall anchor and a big Oxford ground anchor, with D lock and big chain respectively, at different rented houses but only for the single best bike.  It's your impressive stable that makes things more complex, which is a reason why I suggested considering the doors first.  I know the various garages I have used have had awful door locks.  In my parents garage I locked my precious single bike to my father's Super 7 lathe, using a hole I had drilled into its base.

And conveinience too, especially when you start involving children.

As an aside I have been wondering how many garages, built much more than 20 years ago, must be far too narrow to ever fit one of todays massive motor vehicles in them. 

I'd perhaps start with thinking about how to properly secure the garage door(s).