An alarm system that was disconnected but the wiring left in situ.
The doorbell also wired in but doesn't work.
A pointless mini wall to mount the consumer unit and one of the phone sockets on. Might be the master socket, but nobody's got a clue, really.
The kitchen cupboards over the top of the hob that are legally too close to the hob to ever get a replacement installed.
The boiler installed on the wall by the door instead of against the side wall so it could be serviced and the rest of the wall used for a cupboard.
The understairs cupboard that is broom height inside but only has a small square hatch door.
The water and central heating pipes embedded into the concrete floor so they can never be repaired without use of a pneumatic drill.
The three foot drop from the back door to the patio.
The patio slabs wedged in together without any sand/cement between them so they're held there by tension and friction. Plus the inevitable lifting as a result of the ground sinking.
The mystery concrete slab the shed was dumped on rather than putting it where it wasn't taking up the only bit of the garden that gets sunlight, complete with perfect little gaps for rodents to set up homes in.
The bay window that's been added onto the front of the house so that there is no way of securing curtain track or poles, as they built the walls before remembering the window was wider than that. And the window goes right to the hardboard ceiling, so nothing can be attached to that, either.
The loss of interest in installing skirting boards halfway up the stairs.
The random handrail up part of the stairs that's too low, can't be held onto and is embedded into the wall so it can't be replaced.
The many cross beams in the loft that make it impossible to actually reach the roof if it starts leaking.
The TV aerial sockets in each room that don't connect to an aerial. In a TV signal dead spot. No way of installing an aerial, either.
The very expensive solar water heating that was never connected and then when the boiler failed, had to be replaced by a combi because the fancy failing boiler didn't have a replacement available anywhere in Europe.
The shower room drain that lets water trickle around the sides but blocks the actual pipe (just sawn) so the water runs along the pipe into an unspecified destination.
The absence of a stopcock. Individual things can be isolated, but if a pipe bursts before the first isolation valve, we're going to need a dinghy.
The downstairs toilet sink at a height of 2.5 foot, no plug and no covering for the pipework. No toilet lid.
The upstairs bathroom sink that's wedged between the window and the pedestal bit so that it can never be taken out to deal with a leak unless you take a sledgehammer to it.
The bedroom door that's been hung upside down.
The front path that is too narrow to enter with a wheelie bin in the only place it can be put because the gas meter is plonked randomly partway along the wall. We have to have 3 wheelie bins under this local authority, too.
The weird triangular gap where the house was built on the skew so that there is a 2 foot gap at the back to the wall, but a 3 inch one at the front. With a corresponding one on the other house that didn't have a wall dictating they had to be built on the piss.
The sink that's too close to the edge of the cabinet so the overflow pipe could never be connected. Couldn't be further along because then it was too close to the hob.
The decision to create a 1.5m cupboard that is blocked off underneath the boiler instead of one that had opening doors. Access to the boiler pipes is by lifting off the half worktop they decided to put on top (rather than put an entire run of worktop on the opposite side of the kitchen where it would have been useful) and then dangling one's body into the hole.
The specialist low energy lightbulbs that cannot be purchased anymore and require an electrician to remove and replace with a standard fitting.
The shower room with a towel rail as the only heating, uninsulated concrete floor underneath vinyl and within 2 foot of the shower. No shower screen or place to install one and the floor is uneven so shower water runs out of the room into the kitchen rather than down the largely non functioning drain. It's therefore never used, wasting an entire, windowless room in the middle of the kitchen.
The joys of disabled accessible social housing.