Bathroom Renovations in Hamilton Century Homes

Hamilton's lower-city neighbourhoods — Durand with its Victorian and Edwardian brick, Kirkendall's century semis and detached homes — were largely built before 1930, and many of those houses predate the indoor bathroom entirely. The bathrooms we renovate there were carved out of bedrooms and closets decades ago, which is why so many sit at odd sizes, share walls with strange bulkheads, and hide a century of improvised plumbing.

The common stack of issues is remarkably consistent: floors that slope toward one corner, knob-and-tube wiring in the walls and ceiling, galvanized steel supply lines, plaster-and-lath that crumbles during demolition, and a drain path that has been modified three times since Confederation-era planning ever imagined it.

On budget: a full mid-range bathroom renovation runs $15,000 to $30,000 across the GTA in 2026. In a century home, plan for the upper half of that range as your realistic starting point, and $30,000 to $50,000 once layout changes, rewiring, or structural repairs enter the scope. The full cost breakdown in our bathroom guide applies to Hamilton with one caveat — older houses spend more behind the walls and less on the visible finishes.

Tile does not forgive a bad substrate. Century joists were often undersized by modern standards to begin with, then notched and drilled by generations of plumbers running new drains through them. The result is the classic century-home floor: a slope you can feel in sock feet and a toilet that has rocked on its flange for years.

We deal with this before a single tile goes down. Where joists are notched or cracked, we sister new lumber alongside the originals. Where the slope is gradual, self-levelling compound brings the floor flat — typically $3 to $8 per square foot as a line item. Where a previous renovation left three layers of subfloor, everything comes out and we rebuild from the joists up.

This is the least glamorous money in the whole project and the most important. A level, stiff subfloor is the difference between grout lines that stay tight for twenty years and a floor that cracks along the same diagonal the old one did. It is also why the order of steps in a bathroom renovation matters so much in old houses — structure first, waterproofing second, finishes last.

Knob-and-tube wiring was standard in Ontario from roughly 1900 to the late 1940s, so assume a Durand or Kirkendall bathroom wall contains some until proven otherwise — even in houses with a modern panel, since old circuits often survive hidden in ceilings. Insurers now routinely refuse or cancel coverage on active knob-and-tube, and some demand certified removal within 30 to 90 days of a purchase. A bathroom renovation is the practical moment to deal with the circuits feeding that part of the house: selective remediation runs $5,000 to $15,000, while a substantial whole-house rewire lands $15,000 to $35,000, both under ESA permit.

Plaster-and-lath adds its own labour. It demolishes slowly, generates far more debris than drywall, and the keys locking it to the lath let go in unpredictable slabs. Two cautions from the fact sheet we give every century-home client: pre-1960 painted surfaces frequently carry lead paint, and plaster or finishing compounds in homes built before about 1990 can contain asbestos. Testing before demolition costs a few hundred dollars; disturbing either material blind is not an option we offer.

Budget-wise, this is why two Hamilton bathroom quotes can sit $10,000 apart. One contractor scoped the walls. The other did not.

The point of renovating a century-home bathroom is not to make it look like a condo. The details that suit these houses are the ones that were always there — and most translate well to modern materials.

• Clawfoot tubs are worth saving where the layout allows. Refinishing runs $400 to $800, a fraction of replacing with anything of comparable weight and depth.
• Hex and basketweave floors in modern porcelain install at standard rates — $10 to $25 per square foot — and read period-correct without the maintenance of original marble mosaic.
• Wainscoting or tall tile datums suit the high ceilings in these homes and protect plaster walls where they remain.
• Modern guts, period face: thermostatic valves, proper waterproofing membranes, and in-floor heat all hide happily behind a traditional look.

What we counsel against is faithful reproduction of the original waterproofing — which is to say, none. Every century bathroom we open shows water staining in the framing below the tub. The visible design can honour 1910; everything behind it should be built to 2026 standards.

Working in Hamilton's lower city comes with local specifics. Parts of Durand and neighbouring heritage areas fall under conservation-district rules that constrain exterior alterations — relevant to a bathroom renovation the moment you want to enlarge a window or punch a new exhaust vent through street-facing brick. Interior work is generally unaffected, but we plan vent routes with this in mind from day one.

The brick itself demands respect. Lower-city century homes were built with soft industrial-era brick and lime mortar, and Hamilton's escarpment weather — freeze-thaw cycling, wind-driven rain — is hard on it. Cutting a vent opening is done carefully and sealed properly, and any repointing around it uses lime-based mortar; hard modern Portland mortar makes soft historic brick spall.

On the paperwork side, Hamilton's rules follow the provincial pattern: like-for-like fixture and finish replacement needs no building permit, but altering plumbing, moving walls, or structural work does, with the city's minimum permit fee at $283 on the current schedule. Electrical work always needs its own ESA notification regardless. We handle Hamilton, Dundas, Ancaster, and Stoney Creek regularly from our Hamilton service page, and the permit logistics are part of the job, not your homework.

A century-home bathroom in Hamilton typically lands between $18,000 and $35,000 in 2026, with the full spread running $15,000 on a clean, previously-updated house to $50,000 or more where rewiring, structural repair, and layout changes stack together. Add a week or two beyond the standard bathroom renovation timeline — levelling floors and rewiring take real time.

The honest way to think about the range: finishes are roughly the same price in a 1915 house as a 2015 one. What varies is everything you cannot see in the showroom. Our advice, after two decades of this work — carry a 10 to 20 percent contingency, spend it on structure and wiring without hesitation if the walls reveal problems, and economize on fixtures before you economize on waterproofing.

If the bathroom still works but the wiring or floors worry you, start with an assessment rather than a design. And when you are ready to price the real scope, our bathroom renovation team in Hamilton quotes for free, with the behind-the-walls items broken out separately so you can see exactly where a century home spends its money. Licensed, insured, WSIB covered, and backed by a 2-year workmanship warranty.