I renovated a few years ago. Some things I did that I a happy about
Cat6 all over the place with lots in the office. Patch in the basement where he network switch is. Wireless is nice and I have both bands in the house but the throughput isn't what a wire does. The original house had conduit ( emt actually since PVC was in the future.) to some places where I thought I might change things. I never did.
Isonene insulation in the walls and roof. Works great and makes a nice tight house. I have intentional holes in the basement walls to bring in fresh air.
Cat5 to a bunch of outside locations ( cheaper than cat6 at the time) for CCTV.
Lots of underground PVC to locations where I wanted electrics and lights.
I have a 4 zone hydro air system for heat/ac. No gas here so oil boiler and 4 air handlers each with outside ac unit.
A pair of 200 amp services (cheaper than a single 400). PVC underground to a standby generator.
A return loop for the hot water with a circ pump. It is programmable to run when we are likely to want it.
A separate water line to the toilets with a temperature valve to supply room temperature water so no tank sweating.
Combination locks on the house so no keys to lose. Also, you can make up a code for friends or contractors so no need to rekey when keys go missing.
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