Do you have to clean a house before selling it? Absolutely! Remember that first impressions mean a lot, so you have to get rid of any dusty surface, all spots on the floors, and foul smells. Do you have to clean a house before selling it and throughout the selling process? You definitely do! You must give your home a deep clean before AND throughout the selling process. With deep clean, we also refer to mopping floors, cleaning toilets, wiping down surfaces, scrubbing bathrooms, and cleaning rugs. To make sure your place is spotless, consider calling in the professionals.