I moved into a brand new house.
Cracks in the wall from 'settling'.
Cracks in the ceiling from 'settling' being toshed together by a chippie who just wanted to go home rather than make sure the beams were secure
Nearly died from the oven being connected to the mains with a domestic power cable trapped directly underneath the oven so it melted and the breaker didn't work.
Downstairs shower was flow limited when the water pressure was so low that one wasn't needed, leading to a slow trickle.
Shower drain not connected properly, so shower water drained into the foundations.
Forgot to make sure the sink pedestal fitted before fixing the sink so it's wedged in and can never move again, resulting in the basin cracking due to the aforementioned 'settling'.
Garden dropped by 2 foot over winter.
Cracked sewer pipe.
Forgot to get permission from the owner of the land the sewer pipe crosses.
Forgot to notify Electricity Board of the existence of the meter, making it impossible to pay any bills as according to them, the property and supply doesn't exist.
Fitting the wrong size pipes for water supply so the boiler didn't work.
Forgetting to connect up the solar water heating system so it did nothing other than keep a tank of water in the loft that never made it as far as the boiler.
Forgetting to tighten up pipe joints behind a boxed in area so that water was pissing out for six months into the side wall before it was discovered. but it can't be fixed because they made that corner of the house inaccessible by building at an angle.
No connections for TV aerial but multiple aerial sockets connected to nothing.
No weather strip on the front door.
No insulation under the bay roof.
Concreted over other drains and put a shed on top to hide them.
Living room light switch in the hallway. Hallway lightswitch in the kitchen. Kitchen lightswitch in the hallway. Isolation switches labelled x, y and z did nothing and then were found to be incorrectly connected to z, y and h (a random power socket in the back of a cupboard that can't be accessed by a plug).
No insulation on lower half of back wall. It's just breeze block and brick cladding.
Cut off the overflow pipe so water pisses into the top of the sink unit because they cut the sink hole too close to the frame.
No insulation between oven and frame.
Front window wrong size for the hole, so gaps are filled with polyfilla and pebbles on the inside to try and hide it.
Etc.
Stick to your old house. It at least has managed to stay up this long - I give this one about ten years before a side falls off or something.