Layout and finish decisions made once instead of three times: paint and finish schedules, kitchen and bathroom layouts drawn before demolition, furniture plans for empty rooms, and coordination of the trades doing the work.
Typical GTA cost
$150 to $300 per hour
Hourly consultation, or roughly ten to fifteen percent of the construction budget on full service. Excludes furniture, materials and any drawing that needs an engineer or architect to stamp it.
What this trade needs
We hold no licence to check for this category, so insurance and WSIB clearance are what a homeowner compares. That says what we hold, not what the province requires: nobody here has checked whether Ontario licenses this work. References and a written scope do the work a licence check would otherwise have done.
Ask before you hire
Is this hourly, a flat fee per room, or a percentage of what I spend?
Do you take a markup or a commission on anything you order for me, and will you show me the trade price?
What do I own at the end: drawings, a finish schedule, an order list, or a mood board?
Who talks to the trades, and does the fee include site visits while they work?
A percentage fee rewards a bigger budget. If you are choosing between the two, price the same scope both ways before you sign.
You asked for the trade Interior designers and decorators, and the words "window well drainage". Of the 12 businesses listed, none match every one of those.
The cost band and the licence requirements above still apply. They are what you need to judge a quote from anywhere else: whether the price is in the range, and whether the person quoting is allowed to do the work at all.
Listings here are seed data for demonstration and are labelled as such on each profile. Cost bands are what GTA homeowners are typically quoted, not offers. Always confirm a licence number against the issuing registry yourself before work starts.