Can sash window renovation be a DIY work

[OwenIngram]

My fiancé and I are planning to touch up the built-in sash window in our condominium. We found this sash window renovation London based provider online, but we haven’t reached out to them yet. This is because I've found a video guide online and it looks easy that I think I can do it on my own? Is that ideal? Or should we just trust the professionals for this kind of work? Anyone? TIA.

 

[Doghouse Riley]

If the wood of the window is in good condition, then it's a job you can do yourself. You should only need some new cords.
Some sandpaper should be your only other expense,