I had a income doing work at our strata townhouse complex. Should I report this income as self-employment (I have a company) or should I enter it as casual labour.

If it is a small amount of income paid to you personally, you can report it as other income.  If it is a significant amount of money paid to you personally, you would report it as self-employment income and use any expenses you have against it.  If you have a corporation, and it is paid to the company, you will report the income in the company.  You will either take wages or dividends from the company and report those on your personal tax return.