An office rent roll is only reliable when it reconciles to the executed leases, billing, collections and physical occupancy. Buyers also need to see the economic cost of vacancy, rollover, free rent, tenant improvements and leasing commissions. A useful review preserves contractual facts, owner accounts, market assumptions and unresolved exceptions as separate evidence sets.
This is general information, not legal, tax, environmental, engineering, accounting or investment advice. Obtain advice specific to the property and transaction.
1. Preserve the executed lease record
Collect leases, amendments, renewals, assignments, guarantees, notices, waivers and material side agreements. Index parties, premises, dates, signatures and document relationships, and preserve missing or unsigned items as exceptions.
Do not overwrite the source with an old abstract. Keep the executed documents available for counsel and update the summary only through a controlled, dated process.
- Executed leases
- Amendments and renewals
- Assignments and subleases
- Guarantees and security
- Notices and waivers
- Exception log
2. Reconcile premises, area and occupancy
Match tenant, suite, floor, rentable area, usable area, storage, parking and other premises rights to lease exhibits, plans and current occupancy. Identify expansion, contraction, swing-space, shared and landlord-use areas separately.
State the measurement source and convention. Contractual billed area can remain relevant even when another physical measurement produces a different result; the discrepancy should be visible rather than silently resolved.
3. Tie base rent and escalations to billing
Schedule base rent, steps, commencement, fixturing, free-rent periods and other abatements from the executed documents. Reconcile billed and collected amounts to tenant ledgers and accounting evidence.
Identify delayed commencement, holdover, early occupancy, disputed rent, credits and payment arrangements. Keep contractual, billed, collected and projected amounts in separate columns.
4. Reconcile operating-cost structures
Abstract each tenant's additional-rent structure, including proportionate share, base year, expense stop, caps, exclusions, gross-up, management, utilities, after-hours services and annual reconciliation rights. Tie estimates and actual charges to property statements and invoices.
Separate recoverable, non-recoverable, disputed and unreconciled amounts. A current budget is not a final reconciliation and a gross-up assumption should remain visible.
5. Schedule parking, storage and building services
Reconcile reserved and unreserved parking, stalls, rates, validation, storage, signage, access hours, security and after-hours HVAC or service charges to the governing documents and billing.
Identify rights that are shared, separately licensed, terminable or subject to availability. Do not present a service or stall count as permanently committed without the source.
6. Capture options and flexibility rights
Schedule renewal, expansion, contraction, termination, first-offer, first-refusal, assignment, sublease and relocation provisions with notice windows, conditions and source sections. Record whether notices have actually been delivered.
Counsel should interpret enforceability, conflicts and conditions. A rent roll should flag these provisions for review rather than making a legal conclusion.
7. Quantify vacancy and future leasing capital
Create a suite-level schedule for physical vacancy, committed space, lease expiry, known notices and active negotiations. Model downtime, free rent, tenant-improvement allowances, landlord work, leasing commissions, legal fees and restoration separately.
Market-rent, renewal-probability and lease-up assumptions are scenarios, not lease facts. Identify source, date, market segment and preparer for each assumption.
8. Reconcile security, arrears and landlord commitments
Organize deposits, letters of credit, guarantees and other security with custody, expiry and transfer requirements. Tie arrears, credits, abatements and disputes to the tenant ledger and correspondence.
Schedule outstanding allowances, improvement work, delivery obligations and repair commitments with supporting contracts, invoices, permits and source lease sections. Separate completed, committed, disputed and estimated items.
9. Protect tenant and personal information
Stage tenant financials, guarantor data, banking details, contacts, access records and sensitive correspondence according to purpose and buyer qualification. Alberta's PIPA should inform reasonable collection, use, disclosure, safeguards and retention.
Use coded or redacted initial schedules where they provide the required economics. Confidentiality agreements do not eliminate the need for proportionate disclosure.
10. Produce a reconciled exception schedule
The output should show contractual term, billed amount, collected amount, source, verification status, owner adjustment and unresolved issue for each tenant and vacant suite. Preserve questions for counsel, accounting, building operations and buyer diligence.
This guide is educational and is not lease interpretation, legal advice, an audit, tax conclusion, privacy assessment, appraisal or guarantee of occupancy, tenant payment or renewal.
Primary sources
Verify the current rules.
Government and regulator pages can change. These links were reviewed on August 26, 2026.
CRA: Commercial real property—sales and rentals↗Alberta: Personal Information Protection Act↗Alberta: Find land titles documents and plans↗RECA: Real Estate Act Rules and standards of practice↗A real property decision?
Tell us the tenant count, vacancy, upcoming rollover, active leasing and record status.Who, how and why
Who: Commercially Research & Editorial.
How: Primary-source research and AI-assisted drafting were used to organize this guide around a practical commercial real estate decision. Source links, factual claims and material limitations were checked against Commercially's editorial standards on the review date.
Why: To help owners, buyers and tenants identify the records, questions and professional advice that belong in a real transaction work plan.
Editorial owner: Commercially Research & Editorial.
Commercial review: Slav Loban, Commercial Real Estate Division Leader.
Questions or corrections: hello@commercially.ca
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