Dear member,
The minimum compliance checklist depend upon the number of employees and applicable acts.
Pls note there are some basic compliance:-
PF
ESI
Bonus Act
Gratuity Act,
Maternity Benefit Act
Leave rules (as per applicable act whether S&E Act, Contract Labour Act etc.).
Sexual Harassment of Woman Act,
Minimum Wages Act,
Payment of Wages Act,
The Employees Compensation Act
Since yours is a construction company, you must deploy huge manpower through many petty contractors, so CL (R&A) Act, 1970 may also applicable to you. You have to take care about the commercial and legal agreements with the petty contractors and timely renewal of such agreements.
Senior can suggest more points.