We audited Renton Housing Authority (Authority), Renton, Washington. The review was initiated due to a hotline complaint from a Housing Choice Voucher program recipient. The complainant stated that the contract rent was unreasonable because it exceeded the rent for comparable unassisted units on the premises. The audit objective was to determine whether the complaint was valid. We also wanted to determine whether the Authority had controls in place to ensure that rents paid to landlords for its Housing Choice Voucher program were reasonable. We found that the hotline complaint was valid. The contract rent for the complainant's assisted unit was higher than for the comparable unassisted units on the premises by an average of more than $100 per month. In addition, the Authority did not have sufficient controls in place to ensure rents were reasonable. We recommend that the Director, Region X Office of Public Housing require the Authority to collect $10,884 from the owner that was overpaid due to unreasonable rent. We also recommend that the Director, Region X Office of Public Housing review the Authority's revised procedures to ensure that rent reasonableness determinations are carried out in accordance with program regulations and requirements.