Building:<a href="#_ftn1" name="_ftnref1">[1]</a>
It is forbidden to build anything during Chol Hamoed. This applies even if it is for the need of the Moed.<a href="#_ftn2" name="_ftnref2">[2]</a>
Meleches Hedyot:<a href="#_ftn3" name="_ftnref3">[3]</a> It is permitted to perform amateur building jobs on Chol Hamoed if it is being done for the sake of the Moed.
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<a href="#_ftnref1" name="_ftn1">[1]</a> 540:1
<a href="#_ftnref2" name="_ftn2">[2]</a> M”B 540:1
<a href="#_ftnref3" name="_ftn3">[3]</a> M”B 540:1

Shulchan Aruch HaRav | Building on Chol Hamoed

Building:[1] It is forbidden to build anything during Chol Hamoed. This applies even if it is for the need of the Moed.[2] Meleches Hedyot:[3] It is permitted to perform amateur building jobs on Chol Hamoed if it is being done for the sake of the Moed. _________________________________________________ [1] 540:1 [2]