Start by matching the contractor to the house. Hamilton has a lot of older stock, and an accessible remodel in a century home near Gage Park is a different job than one in a newer condo downtown or a split-level in Ancaster. Older homes often hide surprises behind the walls: old plaster, cast-iron drains, uneven subfloors. You want someone who has opened up these bathrooms before and won't flinch when they find something unexpected.
Prioritize real aging-in-place experience over a general renovation resume. A no-threshold shower needs proper floor drainage and waterproofing, and lever taps, comfort-height fixtures, and blocking in the walls for future grab bars are small decisions that make a big difference. Ask to see photos of accessible builds they've actually done. Confirm they're licensed and insured, and get a written quote, a clear timeline, and a warranty in writing before any work starts. In our experience, the vague verbal estimate is where trouble begins.
Think about season, too. Hamilton winters can slow deliveries and make it harder to seal an open space, so book earlier for a warm-weather build if the bathroom is the only one in the house. If it's the only bathroom, ask the contractor how they'll keep it usable or arrange alternatives during the work.
Our honest recommendation: hire an accessibility-focused contractor rather than the cheapest general renovator or a DIY approach. Bathroom renovations for seniors in Hamilton hinge on waterproofing and layout that a generalist may treat as an afterthought, and water damage costs far more than doing it right the first time. The trade-off is straightforward. A specialist usually costs more up front and may book out further, so you'll need patience and a bit more budget. For a room your parent uses every day, we think that's worth it.