Upsize in a falling market and downsize in a rising one?

[Justpassingtime1]

Or is it upsize in a rising market and downsize in a falling one?
I am sure these savvy Mumsnetters will know!

Upsize in a falling market. If house prices all drop by 10%, you may be selling your (previously) £300k house for only £270k but you’re will be buying your (previously) £600k house for £540k - both drop 10% so you lose £30k in the sale but gain £60k purchasing so you’re £30k better off overall.

Depends if you want to stay in the property for a long time.

If prices drop for a little while they always go back up. So if a long time investment you will be fine.