Answers to the most common car detailing questions for Gatineau, Aylmer & Ottawa area drivers. Car detailing costs in Gatineau range from $49.99 for an express wash to $1,029.99 for a full signature detail. Most experts recommend detailing your car 2–4 times per year. A professional detail is different from a car wash — it includes deep cleaning, paint correction, and protection. Alexis Detailing — 15+ years, 44 five-star Google reviews.