I just looked back at our renovation budget. The plumbing total was ~$11,000 for our house with 2.5 bathrooms. This included all new copper plumbing, PVC drains, vents, and gas lines. It also included some sub-slab work (~10 ft). This did not include fixtures. This also doesn’t include drywall (ours was a complete gut, so drywall work was done separately). Hope this helps.