You could try this guy which I used some years ago. Rates were reasonable, but could not be called cheap.
Ezy fix home improvement
Bill Chow
Phone 2522 6226
Mobile 9227 8127
[located in Western Dist]
and to compare a quote, try
T. Ho & Co
Terence Ho
Phone 2544 2572/2543 7896
[located in Central]
Good-wishes for your renovations, which are always stressful.