In general, DOFF cleaning is more expensive than standard pressure washing. The reason is that DOFF uses specialist equipment, superheated steam, and is designed for sensitive or historic surfaces where safety is critical. It’s a skilled process that takes more care than blasting with a high-pressure washer.
However, the real value of DOFF is in the long term. Pressure washing might be cheaper upfront, but if it damages brickwork, stone, mortar, or roof tiles, the repair costs can far outweigh the difference. DOFF avoids these risks and delivers results that last longer, especially when removing carbon staining, biological growth, or old paint.
For a clear idea of cost, see my dedicated DOFF Steam Cleaning service page or request a free test patch to compare the results for yourself.