Fitting Out a Commercial Space: Where the Budget Goes

A fit-out budget behaves differently from a construction budget. What drives each component, and which decisions move the total.

Fitting out a commercial space is rarely about building; it is about services, compliance and the date you open. A fit-out budget that follows a residential logic will misallocate money to finishes and underestimate the systems that determine whether you can operate at all.

What this number does and does not include

This covers fitting out an existing shell: partitions, services, finishes and compliance works. It excludes rent, the landlord's base building works, furniture and IT equipment, and the operating costs that begin at opening.

Mechanical and air conditioning

Cooling, ventilation and air distribution for the occupancy you intend, which in most commercial fit-outs is the single largest services item.

• Pushes it up: High occupant density, kitchen or process loads, long duct runs and base building capacity that must be supplemented.
• Brings it down: Laying out the space so the existing distribution can serve it without extensive rerouting.
• How to control it: Confirm the base building capacity before signing the lease. Discovering that the available cooling cannot support your use is an expensive lesson.

Electrical and low current

Distribution, lighting, power outlets, data cabling, security and fire detection interfaces.

• Pushes it up: Dense power requirements, feature lighting, extensive data points and late layout changes after containment is installed.
• Brings it down: Agreeing the furniture layout before first fix so outlets and data points are positioned once.
• How to control it: Freeze the furniture and equipment layout early. Power and data follow furniture, and furniture decided late is paid for twice.

Partitions and ceilings

Dividing the space and concealing services, including acoustic performance between rooms.

• Pushes it up: Full-height glazed partitions, acoustic ratings, and ceilings that must be removed and reinstated for service access.
• Brings it down: An open plan layout with fewer enclosed rooms, and standard partition specifications.
• How to control it: Decide acoustic requirements by room function rather than applying one specification everywhere.

Fire safety and compliance works

Detection, suppression, emergency lighting, exit routes and signage as required for the occupancy.

• Pushes it up: Changes of use, layouts that compromise exit routes, and requirements discovered after the design is complete.
• Brings it down: Designing the layout around exit requirements from the beginning rather than correcting it later.
• How to control it: Establish the applicable requirements for your intended use before the layout is finalised, and confirm them with the authority rather than assuming.

Finishes and joinery

Flooring, wall finishes, reception and counter joinery, and anything that carries the brand into the space.

• Pushes it up: Bespoke joinery, imported materials and feature elements that require specialist installation.
• Brings it down: Concentrating investment in the areas customers actually occupy and simplifying back of house.
• How to control it: Separate front of house from back of house in the specification. Uniform quality everywhere is uniformly expensive and rarely noticed.

Preliminaries and access constraints

Site management, protection of common areas, out-of-hours working and building management requirements.

• Pushes it up: Restricted working hours, limited lift access, and landlord requirements for protection and supervision.
• Brings it down: Scheduling noisy or disruptive work into permitted windows and planning deliveries around building access.
• How to control it: Read the landlord's fit-out guide before pricing. Access restrictions and working hours can add materially and are invisible in a simple area calculation.

Costs that never appear on the first page

• Landlord approval processes, supervision charges and any required deposits.
• Temporary power and cooling during the fit-out period.
• Statutory approvals and inspections for the intended use.
• Making good the base building where existing conditions differ from the drawings provided.
• Rent and service charges running during the fit-out programme itself.

Keeping the budget honest

Build the budget around services and compliance first, then finishes, and check every assumption about the base building before the lease is signed. In fit-out, the expensive surprises come from the building you inherited, not from the design you drew.

• Before signing the lease, when base building capacity and restrictions can still change the decision.
• After the layout is fixed, because services follow layout.
• Before first fix, when power and data positions are frozen.
• At every landlord comment, since their requirements can change scope without changing your design.

If you are preparing to build, Domira can review your drawings, scope and contractor offers before you commit, and supervise delivery against the programme and specification you agreed.