Proudspire Manor is my favorite vanilla Player Home, because, hell-OOO, CASTLE city!
I have looooong wanted to do a proper -- light -- overhaul of it, and finally did.
Oldrim version here!

REQUIRES USSEP!
Latest version 1.4 requires USSEP, which now requires AE and the free CC content (i.e. the aquarium and fishing plaque places).
That area of the kitchen is edited to accommodate them.
USSEP also already added a cooking pot to the hearth. I've now left it and removed the one I added.



Several rooms redone with subtle but immersive changes:
Kitchen, Smithy, Alchemy and Enchanting
All decoration packages, including children's room, are enabled from the start.
Half Bathroom added between the two main floor entrances, large bath added to Basement.
TONS of new, unique storage!
Lighting is unchanged (beyond fixing them to whole number x,y,z coordinates, cuz I hate decimals & fractions!)
Most of the crappy start-up clutter is removed.
All new clutter and containers are locked down as static w/ "no havok" flags and scripts, but that's the best I can do.
It's still possible to *ram* them and spill stuff, so you'll just have to try not to.
Agarules commented that you can use Jaxonz Positioner to "lock down" everything in the cell you're in.
Works with "Alternate Start - Start in Proudspire Manor" (Start in the bedroom)
You can adopt Blaise (or any other kid) right away.



Blue textures are not part of the mod, it's just something I have installed.
I also have a bunch of hi-res textures by Luxor (awesome!), so mine may look different from yours.
Navmesh fully adjusted for changes (v1.2+)

Carefully cleaned in SSEEdit.
Upload your screenies! They make me happy :) Auto-Approval is on!



Others in the "Simply Improved" Series:
Anna's Vlindrel Hall
Anna's Beezehome
Anna's Honeyside
Anna's Hjerim