Location is always number 1. Most important as will determine future increase in asset value. Your house is likely your largest investment, you buy in the best area you can afford
proximity to public transport, preferably main line rail station within 15 minute walk or short driveway (if parking is easily available)
curb appeal. A nice looking house or the funds are available contravention the look of the house from the front.
not a busy road. One where there is no traffic jam outstde, not a lot of road noise, not on an A road
good sized plot. With a good sized plot, you can usually always extend I believe if you can buy a property you can grow with, good investment. Extend when you can, far cheaper than moving and is an investment if fine well. Always do things with resale value in mind.
good layout, not a rabbit warren. Avoid any property you have to walk through one bedroom to get to another bedroom or where main entrance into the house is through the kitchen. People traipsing through, pushing past while you’re trying to take something out of the oven or big pot if something hot from job to sink is a big no no for me
not overlooked or if somewhat, the ability to plant tres or talk hedges to remedy. Big fan if pleached trees for this very reason
parking. Not inky for your own cars but also for anyone visiting. I simply detest the new build estates where there is basically no street parking because the houses are so crammed it there is no place for someone visiting to park.
low ceilings if it is not a character house or long narrow rooms.