I renovated my kitchen in my house, can I claim this amount as maintenance for my work space at home expenses on form T777(1)

You can only deduct the part of your costs that relates to your work space, and you can’t claim personal expenses. If you don’t use your kitchen for employment purposes, then you can’t claim expenses related to it.

Here is more info at the CRA: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-re...