A proper remediation for a shower area typically involves containment to prevent spores from spreading, removal of the contaminated grout and potentially affected tiles, treatment of the underlying wall with antimicrobial agents, and finally re-grouting and sealing. The final cost is driven by the area’s size, the extent of demolition required, and the materials needed for restoration.

For an accurate assessment, you need a professional inspection. A certified inspector will use moisture meters and possibly borescopes to check behind walls, determining the full extent without unnecessary demolition. They should provide a detailed scope of work and a corresponding quote. Always request this assessment and quote in writing before any work begins. The key is to solve the moisture source—often poor ventilation or a hidden leak—or the mold will simply return, making any cost a temporary fix.

Given Dubai’s high humidity and constant AC use, which creates condensation, proper ventilation is the ultimate long-term solution for bathroom mold.