Building alteration services, including remodelling and small extensions, are treated as works contract or repair and renovation services under GST. In the earlier years, different ways of splitting labour and material or combining alteration with new construction sometimes led to different effective tax outcomes for similar jobs, which made planning and comparison difficult for owners and contractors.
After the September 2025 rationalisation, most building alteration and remodelling services under SAC 995449 generally fall in the 18 percent slab with input tax credit. This standard rate applies to internal layout changes, small extensions and similar alteration work unless a specific notification prescribes a different treatment for a particular scheme.
The table below gives the latest GST rate for services under SAC code 995449.