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Once you understand what is an interior fit-out, the next thing that trips people up is the different types of fit out referenced in lease agreements and contractor quotes. Shell and core, Cat A, Cat B, residential fit-out, these terms get used loosely and inconsistently, and knowing which one applies to your space changes what work is actually left to do and who’s responsible for it.
Shell and core is the most basic state a commercial unit gets handed over in, structural walls, facade, and core building services like the main electrical riser and fire systems, but nothing usable inside. No flooring, no ceilings, no internal partitions, no finished MEP distribution within the unit itself. It’s the starting point for the rest of the types of fit out that follow.
Cat A fit-out is the next layer up. It typically includes raised access flooring, suspended ceilings, basic lighting, and MEP distributed around the space, along with painted walls, but without partitions or anything specific to how a particular tenant’s business operates. Many landlords deliver units at Cat A standard specifically so tenants have a consistent, presentable base to build from.
Cat B fit-out is the tenant-specific layer built on top of Cat A, partitions for meeting rooms and private offices, branded reception areas, kitchenettes, and any specialized fit-out relevant to the business, a server room, a treatment room, a display kitchen. Of all the types of fit out, Cat B is the one that varies most from tenant to tenant, since it’s built entirely around how that specific business operates. It’s also the type of fit out most commercial tenants in Dubai actually end up budgeting for, since Cat A is usually already handled by the landlord.
Residential handovers work on a simpler scale of the same idea. Some developments hand apartments over fully finished, flooring, kitchen, wardrobes, ready to move in. Others hand over as a genuine shell, requiring the buyer to fit out everything from flooring to kitchen cabinetry before the unit is livable. Villas sometimes fall somewhere in between, structurally complete but needing a full interior fit-out for finishes and joinery. Of the residential types of fit out, shell handover is the one that surprises first-time buyers most, since the sale price rarely makes clear how much additional work is actually needed.
Understanding which category your space falls into changes your budget expectations significantly. A Cat B fit-out on top of an existing Cat A base costs considerably less than fitting out a bare shell from scratch, since the flooring, ceilings, and base MEP are already done. Confusing these types of fit out when budgeting is one of the most common reasons commercial tenants end up surprised by a quote that’s higher than expected. Getting clear on the type of fit out you’re dealing with before requesting quotes saves everyone time comparing numbers that aren’t actually comparable.
It also affects approvals and timelines. A Cat B fit-out on an existing Cat A base typically moves faster through approvals than a full shell fit-out, since there’s less structural and MEP work to review and sign off on. This timeline difference alone is worth clarifying early, since the types of fit out involved can shift a project from a six-week job to a four-month one.
Check your lease or sale agreement for the handover specification, it should state explicitly whether the unit is shell and core, Cat A, or fully finished. If it’s unclear, a site visit tells you quickly, bare concrete and exposed services mean shell and core, finished ceilings and flooring with empty rooms mean Cat A, and a fully furnished, move-in ready space means the fit-out is already complete. When in doubt, ask your contractor to walk the space with you and confirm which of the types of fit out you’re actually starting from before any design work begins.
For office fit-out projects specifically, most commercial leases in Dubai hand over at Cat A, meaning the Cat B scope is what you’re actually budgeting and planning for, partitions, branding, and workstation layout. For residential clients, an apartment fit-out on a shell-handover unit needs the full sequence, flooring through to joinery, while a fully finished handover might only need styling and furniture. Matching the right approach to the right one of these types of fit out from day one avoids paying for scope you don’t actually need.
Tenants sometimes assume Cat A means the space is ready to move into, when in commercial leasing it usually just means the base is done and Cat B work is still needed before the business can actually operate there. Another common mix-up is assuming all the types of fit out follow the same approval process, when shell and core work typically needs more extensive sign-off than a Cat B fit-out layered onto an existing base. And some residential buyers assume a shell-handover unit includes basic finishes, only to find out during the site visit that literally everything, flooring, ceilings, kitchen, needs to be built from scratch. Getting these types of fit out sorted out clearly before signing a contract avoids most of this confusion.
The main types are shell and core, Cat A, and Cat B for commercial spaces, along with shell-handover and fully finished categories for residential units.
Shell and core is the bare base building with no internal finishes. Cat A adds raised flooring, suspended ceilings, basic lighting, and MEP distribution, but no tenant-specific partitions or branding.
Cat B includes tenant-specific work like partitions, branded reception areas, kitchenettes, and any specialized spaces relevant to that particular business.
Check your lease or sale agreement for the handover specification, or do a site visit, bare concrete means shell and core, finished ceilings and flooring with empty rooms usually mean Cat A.
Generally yes, since the flooring, ceilings, and base MEP are already in place with a Cat A base, so the remaining Cat B work is more limited in scope.
Not exactly, residential units are usually described as either fully finished, partially finished, or full shell handover, rather than using the Cat A and Cat B commercial terminology.
Knowing which of the types of fit out applies to your space is the first real step in budgeting and planning a project accurately, since it changes both the scope of work and the approval process ahead of you. Whether you searched “types of fit out” to make sense of a lease agreement or a sale contract, the categories above should clear up most of the confusion. If you’re not sure which category your unit falls into, book a free consultation and we’ll assess it during a site visit before quoting anything. You can also see more of our completed fit-out projects on the Dream Heaven Decoration homepage.
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