Two scopes that look similar on a floor plan

A tenant improvement is work inside a leased suite so a specific tenant can occupy it: interior partitions, lighting, flooring, ceiling grid, restroom within the suite, data and power rough-ins, and the finishes that make the space usable on the first day of the lease.

A renovation, from the owner side, is work that repositions the asset itself: corridors, lobbies, common-area restrooms, elevator waiting areas, multi-suite conversions, and the code upgrades that come with changing how a floor or a building is used. The suite count on a floor plan may be identical; who is paying and what is being repaired is not.

Who pays for what

On leased space, the lease abstract is the first budget document. Most commercial leases carry a tenant improvement allowance — a landlord contribution toward fit-out. Work inside that allowance is effectively rent-side money; work above it is tenant capital. Owner-side renovation typically sits in the capital budget and is planned between tenants, when suites are vacant and the disruption has somewhere to land.

Base-building systems — main electrical distribution, plumbing risers, fire protection mains, the shell and structure — are usually the owner's side of the line even when the tenant is paying for the suite. A scope that blurs that line is where change orders come from, so the line should be drawn in writing before pricing starts.

Where the categories blur — and why permits care

A single-tenant building converting into multiple speculative suites is both at once: it is a renovation of the asset and a set of future tenant improvements. Common corridors, a new reception and shared restrooms are owner work; each finished suite is a tenant improvement ready for its first lease. Permits for those scopes interlock — the corridor permit and the suite permits depend on each other, and sequencing them is a planning exercise, not a formality.

  • Multi-suite conversions: corridor, life-safety and suite permits that must be sequenced together.
  • Change of use: a use class change can trigger accessibility, egress and fire-separation upgrades beyond the fit-out.
  • Occupied buildings: the renovation scope has to be phased around tenants who are still working.

What to bring to the estimating conversation

Whether you sit on the tenant side or the owner side, the same items turn a vague budget call into a usable number. Bring them to the first walkthrough and the scope-to-budget conversation gets shorter.

  • The lease abstract, with the improvement allowance and any delivery-condition obligations spelled out.
  • The most current drawings — landlord plan, as-built, or the architect's permit set, whichever exists.
  • The date the space must be usable, and the rent-start date it is usually anchored to.
  • The building's work rules: construction hours, freight and loading access, insurance and certificate requirements.
  • The finish standard in plain language, plus who on your side approves a change in scope.