Residents are advised that retaining walls require a building permit prior to construction, and foundation designs must be prepared and stamped by a licensed structural engineer. Where the proposed work involves cutting into a hill or slope, a geotechnical review and supporting documentation will also be required. These requirements help ensure that retaining walls are designed and constructed safely, with appropriate consideration for soil conditions, drainage, slope stability, and long-term performance. If you have any questions or require further information, please contact the office at 306-694-8300.