Unfortunately we had a difficult experience with Riddwood. The surveyor appeared very efficient but it took literally months to get the full drawings and calculations completed eventually by a different engineer/surveyor who did not visit to check the original calculations. This was only after a considerable amount of chasing by our architects. We paid the bill in full on time and had little financial leverage to force completion. We did receive the plans etc eventually but the time delays were unsatisfactory and regrettably I would not be able to recomend their services to others as a result of my experience.