Renovation cost guidance
Renovation costs vary because existing conditions, finish selections, structural work, mechanical changes, access, permits, and the level of design are different in every home. This guide organizes those variables so homeowners can compare proposals on equal terms instead of treating the lowest headline number as the complete price.
The pages below explain how to prepare for bathroom, kitchen, whole-house, basement, and addition estimates. They do not provide a project quote. A reliable figure requires drawings or a detailed scope, a site review, allowances that match your expectations, and confirmation of current municipal requirements.
Define the same scope before comparing prices
Two estimates can look similar while covering very different work. Record which rooms are included, what will be demolished, whether layouts or utilities move, which finishes are owner supplied, and who handles permits and inspections. Ask each contractor to price the same written scope and identify exclusions, allowances, and optional work separately.
Separate known work from allowances and unknowns
Fixed selections can be quoted more precisely than products that have not been chosen. Cabinetry, tile, plumbing fixtures, appliances, and lighting are commonly carried as allowances until selections are final. Hidden water damage, outdated wiring, hazardous materials, or structural conditions may remain unknown until investigation or demolition, so the proposal should explain how changes are documented and approved.
Plan for permits, design, and specialist input
The construction amount is not always the entire project budget. Depending on the scope, homeowners may also need design drawings, engineering, surveys, energy or trade documentation, municipal permit fees, inspections, temporary accommodation, storage, or utility work. Requirements depend on the property and proposed changes, so confirm them before relying on an early budget.
Keep a contingency tied to project risk
A contingency is a planning reserve rather than an invitation to spend more. Its size should reflect how much of the building is concealed, the age and condition of the home, how complete the drawings and selections are, and whether the work changes structure or services. Track approved changes against that reserve throughout construction and retain records for closeout.