Calgary Office Conversion: Building Condition Assessment First
Considering converting an underused Calgary office building?
Brookstone Inspection Services Ltd. prepares Building Condition Assessments and Property Condition Assessments for owners, investors and developers across Calgary Metro, Edmonton Metro and Central Alberta. Field work is performed by CCPIA-certified inspectors, and reports are reviewed and stamped by APEGA-licensed Professional Engineers.
Request a Building Condition Assessment Quote → · or call 587-333-5530
Before you commit to converting an office building into housing, a hotel or another use, a Building Condition Assessment (BCA) tells you what the existing roof, envelope, structure and building systems can carry forward, what must be replaced, and what that will likely cost. That information belongs in your feasibility study, not in a surprise change order.
Calgary has a large surplus of downtown office space. The City's own 2026 analysis describes more than 12 million square feet of vacant office space and treats much of it as a long-term structural surplus. Conversion is one of the main tools the City has used to address it.
Where Does Calgary's Conversion Program Stand?
The City of Calgary's Downtown Office Conversion Program has offered funding to convert underused downtown office space into residential units, hotels and other eligible uses. It relaunched in June 2026 under that name with updated terms, including incentives of up to $75 per square foot for eligible uses.
The program is closed to applications right now, according to the City's website. This guide focuses on feasibility work owners can do now, so they are ready if funding reopens or if a project proceeds without incentives. Check calgary.ca for current program status and terms.
The City's application materials ask applicants to disclose known structural, environmental, code and servicing constraints. A condition assessment is one of the clearest ways to identify them early.
Why Start a Conversion With a Condition Assessment?
Conversion budgets live or die on what can be reused. A BCA answers practical questions early:
Can the roof and envelope stay, or do they need replacement as part of the project?
What remaining life do the boilers, chillers, air handlers and electrical service have?
Are elevators near the end of their life or in need of modernization?
What deferred maintenance will the new use inherit?
What immediate repairs are needed regardless of the conversion?
The answers shape whether a building is a strong candidate, a marginal one or better suited to another path.
Which Building Systems Matter Most in an Office Conversion?
Every conversion is different, but the same systems usually drive cost.
Building Envelope and Windows
Residential and hotel uses need comfortable, weathertight units with access to daylight. The City's criteria favour natural light and operable windows for residential units. Window condition, curtain wall performance and sealant age are key findings.
Mechanical Systems
Office HVAC is designed for open floors and daytime occupancy. Residential and hotel uses need individual unit control and continuous operation. The BCA documents what exists and its remaining life so designers can decide what to keep.
Plumbing
Converting to housing adds kitchens and bathrooms on every floor. Existing risers, domestic hot water capacity and drainage condition all affect the design.
Electrical Service
Unit metering and in-suite loads change electrical demand. The BCA records the service size, distribution equipment and visible condition.
Vertical Transportation and Life Safety
Elevators, fire alarm and sprinkler systems will likely be reviewed by the design team against current codes. The BCA documents age and condition as a starting point.
What Does a BCA Not Cover in a Conversion?
A BCA is a condition and cost document, not a design or code review. For a conversion, your team will usually also need:
Architectural and structural design for the new layout.
A code analysis by the design professionals.
Environmental reviews, such as hazardous building materials surveys and, where needed, a Phase I Environmental Site Assessment.
Energy modelling, where climate or performance targets apply.
A good BCA hands that team reliable baseline information, so their work starts from facts.
How Should the BCA Be Scoped for a Feasibility Study?
Tell the assessor the building is being considered for conversion. That changes what matters in the report.
Confirm the proposed use so findings focus on what carries forward.
Ask for remaining useful life for each major system.
Request Opinions of Probable Cost for near-term and capital items.
Include all floors, roof and mechanical rooms in the site visit.
Request an editable cost table your cost consultant can use.
Share drawings and past reports to save time on site.
When Is a Building a Weak Conversion Candidate?
Some findings make conversion harder. A BCA may highlight:
Envelope systems at end of life across most elevations.
Major mechanical plant needing full replacement.
Deep floor plates that leave many units without windows.
Significant deferred maintenance throughout.
These are design and financial questions for your team. The BCA helps you see them before you spend on detailed design. The City also runs a separate incentive for demolishing end-of-life office buildings, which shows how varied outcomes can be.
How Does a BCA Fit Into the Conversion Feasibility Sequence?
A practical sequence helps owners spend feasibility money in the right order.
Market and use study: confirm the target use, such as rental housing, a hotel or student housing, makes sense for the location.
Building Condition Assessment: document what exists, its condition, remaining life and likely costs.
Environmental reviews: a hazardous building materials survey for older buildings and, where needed, a Phase I Environmental Site Assessment.
Concept design: architects test unit layouts against the floor plate and window positions.
Code and structural review: design professionals confirm what the new use requires.
Cost plan: a cost consultant combines BCA costs with conversion construction costs.
Financing and incentive review: lenders, investors and any available programs.
Starting with a BCA early means the design team and cost consultant work from verified information rather than assumptions.
Which Office Building Eras Raise Specific Questions?
Calgary's downtown office stock was built over several decades, and each era has typical issues. These are general patterns, not findings for any specific building.
1970s and Early 1980s Towers
Many were built during Calgary's energy boom. Original curtain walls, single-glazed or early double-glazed units, and original mechanical plant may be near or beyond expected life. Older buildings may also contain hazardous materials that need a survey before renovation.
Late 1980s and 1990s Buildings
Envelope systems and mechanical equipment may have been partially upgraded. A BCA sorts out what was replaced and when, which strongly affects conversion budgets.
2000s and Newer Buildings
Systems are newer, but deep floor plates designed for open offices can make residential layouts harder. The condition may be good while the layout is the bigger challenge.
What Should Investors Ask Before Buying a Building to Convert?
If you're acquiring an office building with conversion in mind, build condition questions into your due diligence.
What capital work has the current owner completed, and is there documentation?
What is the age and condition of the roof, curtain wall, elevators and central plant?
Are there known water leaks, envelope failures or structural concerns?
What tenant leases remain, and how will they affect the conversion timeline?
Have any previous condition assessments, energy audits or hazardous materials surveys been done?
A Property Condition Assessment during the purchase condition period can answer many of these questions before you waive conditions.
How Do Climate and Energy Goals Affect Conversion Scope?
Conversions are often a chance to improve the building envelope and mechanical systems. The City of Calgary's Downtown Retrofit Challenge case study for the Dominion Centre conversion describes how the project team gathered recent building condition assessments, energy audits and feasibility studies before an energy modelling workshop.
That example shows how condition information feeds performance decisions:
Envelope upgrades may be needed anyway if the BCA finds windows or cladding at end of life.
Heat recovery ventilation and new heating systems may replace aging central plant.
Energy modelling relies on accurate information about what will stay and what will change.
A BCA doesn't replace an energy audit, but it tells the energy team which components are near replacement and which can stay.
What Does a Conversion-Focused BCA Report Look Like?
The report follows the usual BCA structure, with emphasis on what matters for reuse. Expect:
An executive summary describing overall condition and key constraints.
System-by-system findings with photographs.
Remaining useful life and Opinions of Probable Cost for each component.
Immediate needs that apply regardless of the conversion.
Notes on components likely affected by the new use, flagged for the design team.
An editable cost table for the cost consultant.
The report is reviewed and stamped by an APEGA-licensed Professional Engineer.
What Are the Risks of Skipping the Condition Assessment?
Conversion budgets are tight, and skipping early due diligence can be costly. Without a BCA, owners risk:
Discovering major envelope or roof failures after design is underway.
Underestimating mechanical and electrical replacement costs.
Missing deferred maintenance that must be addressed before occupancy.
Losing time when lenders or investors ask for condition information that doesn't exist.
Making incentive or financing applications based on incomplete constraint information.
A condition assessment costs a small fraction of a conversion budget. It reduces the chance that the biggest surprises appear after commitments are made.
How Do Owners Use the BCA After Feasibility?
The report stays useful even if the conversion doesn't proceed.
If you convert: the design team uses it as the baseline for scope, and the cost consultant uses it to separate reuse from replacement.
If you keep the building as office: it becomes a capital plan for leasing upgrades and system renewal.
If you sell: it gives buyers documented condition information and supports your asking price.
If you pursue another use: the same findings inform hotel, student housing or other adaptive reuse options.
Whatever the outcome, the owner ends up with a clear record of what the building needs.
Which Questions Should the Design Team Bring to the Assessor?
The best conversion BCAs start with a short conversation between the assessor and the design team. Useful questions include:
Which floors are candidates for residential or hotel layouts, and which may stay commercial?
Is the curtain wall or window system likely to stay, or is re-cladding already being considered?
Will the central plant be reused, or is a decentralised system expected?
Are there areas where destructive testing may be needed later, such as concealed envelope or slab conditions?
What level of cost detail does the cost consultant need?
Answering these up front keeps the assessment focused on the decisions the owner actually has to make.
Common Questions About Office Conversion Assessments
Is a BCA required for Calgary's conversion program? The City's requirements list does not name a BCA as a standalone requirement. It does ask applicants to disclose known structural, environmental and code constraints.
How long does a BCA take on an office tower? It depends on size, floors and access. Ask for a schedule in the proposal.
Can a BCA help with lender or investor discussions? Yes. Lenders and investors often want third-party condition and cost information before committing to a project.
Does Brookstone design conversions? No. We document condition and costs to support your design team and feasibility study.
How Do You Get a Building Condition Assessment for a Conversion Study?
Request a quote at commercial.brookstoneinspection.com or call 587-333-5530. Include the address, floor area, number of floors, proposed use and your feasibility timeline. Our guide to Property Condition Assessments in Alberta explains how condition reports support acquisitions.
We regularly work with owners and developers in:
Who We Are
Brookstone Inspection Services Ltd. provides commercial property inspections, Building Condition Assessments, Property Condition Assessments and capital-planning services across Alberta. Inspectors are CCPIA-certified, and reports are reviewed and stamped by APEGA-licensed Professional Engineers.
Request Your Building Condition Assessment Quote → · 587-333-5530
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