By Cassandra Mascarenhas, Product & Marketing Strategist, Projx - a project delivery platform for leading client-side property development and capital works teams
Published on August 23, 2026
When a commercial office floor comes back to market, one of the first questions landlords, asset managers and leasing teams face is: What condition should we deliver this space in?
The answer usually sits somewhere between a cold shell, a warm shell, or a fully fitted spec suite each with different cost, risk and leasing implications. And because shell condition connects directly to capital expenditure (Capex) planning and office repositioning strategy, it’s worth understanding the differences clearly.
👉 If you’re deep in Capex planning already, our blog on the different types of Capex in capital works is a useful read.
A quick note: the global market language around building shell condition types isn’t always consistent. What one landlord calls a warm shell, another might call a partial fit-out. The following is a breakdown based on how Australian and New Zealand owners, project managers and leasing teams typically use the terms.
A cold shell is the most stripped-back office condition you’ll come across. Think concrete floor, exposed slab, base building services (MEP) only, and no interior finishes. It’s effectively a “raw” tenancy with the essentials required for code compliance, and not much else.
A cold shell usually includes:
This is a common choice when the outgoing tenant has been in place for 10+ years and everything is too outdated to reuse. It’s also common in new developments where the leasing strategy focuses on tenant-driven design.
Cold shells can reduce upfront landlord costs but shift more responsibility (and expense) to incoming tenants, which is why they’re often accompanied by stronger tenant improvement allowances (Australia) or rental incentives.
A warm shell office space sits in the middle. Not fully fitted, but definitely more “market-ready” than a raw box. It provides enough built form to help tenants visualise their future layout while still giving them flexibility to customise.
A warm shell typically includes:
Warm shells reduce commercial office fit-out costs in Australia because tenants aren’t starting entirely from scratch. They also help shorten leasing campaigns, especially when a market prefers move-in-ready spaces without committing to the style of a spec suite.
Warm shells work well in buildings undergoing repositioning where the landlord wants to preserve optionality: invest enough to feel modern, but not so much that the next tenant feels locked into a design.
A speculative suite commercial office, or “spec suite” as it’s often referred, is a fully built, furnished, ready-to-occupy space designed to appeal to tenants who want:
Spec suites typically include:
In markets with high competition for tenants, spec suites lease significantly faster than cold or warm shells. They also give landlords flexibility, from accelerating deal cycles to repositioning ageing floors, which is a key part of an office repositioning strategy.
The trade-off: higher upfront Capex planning for commercial property, but often rewarded with faster deal velocity and stronger rents.
Regardless of whether a tenancy is delivered as a cold shell, warm shell or spec suite, the on-floor works play a huge part in leasing outcomes.
These upgrades cover the shared amenities on each floor, including:
While these areas aren’t directly leasable, they influence tenant perception immediately. A modern tenancy next to an outdated lift lobby sends mixed signals, and slows down leasing. This is why many landlords bundle on-floor works into their asset lifecycle management property strategy when refreshing older buildings.
A tenant vacates after a decade. Their fit-out is structurally outdated and doesn’t match current design expectations.
Option 1: Cold shell -> Strip everything back to concrete, remove all partitions, disconnect lighting and take it to base - but make sure it meets minimal compliance standards.
Option 2: Warm shell -> Keep ceilings, lights and flooring; patch walls; leave a clean canvas for internal fit-out.
Option 3: Spec suite -> Invest further: new workstations, enclosed meeting rooms, kitchen, flooring upgrades, and styling elements for a turnkey solution.
The choice usually depends on leasing demand, building grade, target tenants, and the property’s wider capex program.
It depends on what’s right for your asset strategy and market conditions.
If you’re mapping out future Capex, shell condition sits at the front end of your positioning strategy, and it also feeds into long-term capital works planning, budgeting and lifecycle costs.
Understanding the differences helps teams plan Capex for landlords and asset managers, forecast leasing timelines more accurately, and choose fit-out investments that align with long-term value creation.
Platforms like Projx add real value by helping asset owners get a clear oversight of completed and live projects, grouped by works type - whether that’s cold shells, warm shells, spec suites or on-floor upgrades.
This way, teams can build a clearer picture of what different approaches actually cost over time and gauge delivery challenges, design trade-offs, hidden risks and lessons learned along the way. A portfolio-level view also allows more informed Capex planning that’s grounded in what’s already been delivered across the asset base.
What is the difference between a cold shell, warm shell and spec suite in commercial office leasing?
A cold shell is a stripped-back tenancy with base building services only. No ceiling, flooring, lighting or partitions. A warm shell adds the foundational finishes, such as ceiling grid, basic lighting, air-conditioning distribution and flooring, giving tenants a ready-to-fit canvas without locking in a design. A spec suite is fully fitted and move-in ready, including workstations, meeting rooms, kitchen, AV and considered finishes. Each represents a different level of landlord capital investment and carries different leasing speed and cost implications.
What does a cold shell office space include in Australia?
A cold shell in Australian commercial office leasing typically includes base building services only (HVAC, fire and electrical connections) with exposed structure, concrete floors, no ceiling grid or tiles, no lighting, no partitions and no internal finishes. It represents the most stripped-back tenancy condition and is most common after a long-term tenant vacates or in new developments where the leasing strategy is tenant-driven design.
What is a spec suite and why do landlords build them?
A spec suite is a fully fitted, move-in-ready office tenancy built speculatively by the landlord before a tenant is secured. It typically includes workstations, meeting rooms, breakout and kitchen areas, flooring, lighting, AV and joinery. Landlords build spec suites to accelerate leasing campaigns, particularly in competitive markets where tenants want speed and certainty. The trade-off is higher upfront capital expenditure, usually offset by faster deal velocity and the ability to achieve stronger rents.
How does shell condition affect Capex planning for commercial property?
Shell condition is one of the earliest and most significant Capex decisions in an office repositioning or leasing strategy. A cold shell minimises upfront landlord expenditure but typically requires stronger tenant incentives and longer leasing campaigns. A warm shell requires moderate investment and preserves design flexibility. A spec suite requires the highest upfront capital but generally achieves the fastest leasing outcomes. The right choice depends on building grade, target tenants, market conditions and the asset's wider capital works program.
For more on how Projx supports client-side project delivery teams across property development and capital works programs, see how owner-side teams use Projx
Last updated on August 23, 2026
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