PACE financing allows property owners to pay for energy efficiency, renewable energy, and water efficiency projects through additional assessments on their property tax bill over 5-20 years. The contractor receives funds upfront to complete the retrofit project. Then the property owner pays back the funds as a special assessment on their property taxes. This overcomes challenges like lack of access to financing, limited internal capital budgets, and uncertainty around payback periods by spreading costs over many years and securing repayment through a senior lien on the property.