You can never write off volunteer/donated time under any circumstances, regardless of the tax status of the organization.
Most HOAs are nonprofit organizations, but I've never heard of one being classified by the IRS as a 501(c)(3) nonprofit, for which all or part of your donation of cash and/or property would be deductable. Not all 501(c)(3) organizations are such that the full value of your donation is deductable.
You can check the IRS website for a list of 501(c)(3) nonprofit organizations and see if your HOA is on it (though I think it's unlikely).
But you should really consult a tax professional on this matter, and I am not one.