Office and Shop Defit Sydney What Really Happens from Brief to Bank Guarantee

Picture this. A bank guarantee of $180,000 sitting at risk. Four weeks to complete a full defit in a building where the goods lift closes at 6pm and the building manager requires 10 business days notice for access permits. And the lease expired last Friday.

This is not an unusual situation. It is a routine one for commercial tenants who did not plan the defit with enough lead time. And the gap between a defit that goes smoothly and one that drags into holdover rent territory is almost always a planning and sequencing problem, not a physical one.

A defit is not demolition. Knocking down a building happens on an open site where the environment is controlled. A defit happens in a live commercial building with other tenants operating on the floors above and below, building management setting the rules, goods lifts with booking windows, and a landlord waiting to inspect against a specification before releasing funds.

This covers every stage of a professional Sydney office or shop defit: what back to base building means in practice, how services isolation works, why strip-out follows a specific sequence, how night work logistics are managed, what building management requires, and exactly what documentation triggers the bank guarantee release.

What “Back to Base Building” Actually Means in Practice

Back to base building means returning the tenancy to the condition it was in before the fitout was installed, as defined by the landlord’s specification. The phrase sounds straightforward. The reality is that every building has a different base building specification, and the same words in two different leases can require completely different scopes of work.

For each requirement in the specification, three questions cut through the ambiguity:

1. What standard? Is patch and paint to match the existing base building colour, or is it to a fresh repaint standard? Is carpet replacement the full floor plate or just the leased area?
2. Who certifies? Does the work need sign-off from a licensed trade, an independent inspector, or is the contractor’s sign-off sufficient?
3. What documentation? Does the landlord require as-built drawings, isolation certificates, or just photographic records?

Common Requirements Interpreted

“Remove all fitout”: This requires identifying what is fitout and what is base building. Fitout is everything the tenant installed. Base building is what the developer delivered. The confusion arises when a tenant inherits items from a previous occupant. Those inherited items may or may not be base building depending on whether they appear on the original base building drawings. Obtain those drawings. Check them. Do not guess.

“Patch and paint”: Standard interpretation is fill all penetrations left by the fitout, patch any surface damage, and repaint to a fresh, even finish in the base building colour. Some specifications require the entire tenancy to be freshly painted even if only one wall has penetrations. Clarify the extent in writing before work starts.

“Restore services”: Services must be returned to the base building condition with all tenant modifications removed. Certification from licensed trades is typically required. Each service type has its own certification requirement, covered in the services isolation section below.

“Replace carpet tiles”: Most large commercial buildings use modular carpet tiles. The question is whether replacement applies to the leased area only, or whether matching tiles must be sourced for areas adjacent to the tenancy if the existing floor tile stock has been discontinued. Raise this early. Discontinued tiles that cannot be matched create a whole-floor replacement scenario.

What is commonly disputed: landlords claiming fitout items are base building because they want them retained, and tenants claiming base building items are their fitout because removing them is cheaper than reinstating them. Both happen regularly. The base building drawings are the definitive reference. If there is no agreement on what the drawings show, this is a matter for your solicitor under the lease.

Services Isolation: The Step That Cannot Be Skipped

Nothing physical gets stripped before services are isolated. This is not a preference or a best practice suggestion. It is a safety requirement. Commercial tenancy fitouts sit on top of live building services in ways that are not always visible. Live electrical cables run inside partition walls. Pressurised hydraulic lines sit below raised floor tiles. Charged fire suppression systems connect to sprinkler heads above the ceiling grid. Starting demolition before these are made safe puts people at immediate risk.

Electrical Isolation

All tenant electrical circuits must be isolated and de-energised by a licensed electrician before any partition, ceiling, or flooring is touched. The electrician traces the circuits back to the distribution board, isolates each tenant circuit individually, and confirms isolation with a test instrument before signing off. This is not a task for the strip-out crew to do themselves. The electrician’s sign-off is the confirmation the contractor needs before any physical work begins in any area.

What the isolation certificate for electrical must confirm: each isolated circuit identified by board reference, test confirmation of de-energisation, the licensed electrician’s name and licence number, date and signature. This certificate becomes a mandatory document in the close-out pack.

HVAC Decommissioning

HVAC decommissioning means returning the mechanical systems to the base building state. In most commercial buildings, this involves removing any tenant-installed fan coil units, diffusers, or supplementary units, and returning connections to the base building VAV (variable air volume) or chilled water system. A mechanical services contractor carries out the decommissioning. What stays and what comes out is defined by the base building mechanical drawings.

The decommissioning certificate confirms the system has been returned to base building configuration, all connections are capped or reinstated, and the base building mechanical system is functioning correctly after the work. This certificate is provided by the mechanical contractor and forms part of the close-out documentation.

Hydraulic Services

Cold water and hot water services installed as part of the fitout, typically for kitchens, tea points, and bathrooms within the tenancy, must be capped at the point of connection to the base building supply. A licensed plumber performs this work. After capping, a hydraulic test is conducted to confirm there are no leaks at the cap points. Leaving a water service connection uncapped in a raised floor void or above a ceiling is one of the more common causes of serious water damage in commercial buildings discovered weeks after a tenant vacates.

The hydraulic isolation certificate confirms each service has been capped, the cap locations, and the pressure test result. Issued by the licensed plumber who did the work.

Fire Suppression System

The fire suppression system requires specific handling. The base building manager must be notified before any work that affects the sprinkler system or fire detection system begins. In some circumstances, particularly where the fire brigade monitoring service is connected, the local fire brigade must also be notified and the system may need to be isolated at the building level rather than at the tenancy level. This requires advance coordination with the building fire safety officer.

What gets isolated versus what remains: tenant-installed sprinkler drops and heads that are not required in the base building configuration are removed. The base building sprinkler grid and mains remain. Any changes to the configuration must be tested and certified by a licensed fire protection contractor before the system is returned to active status.

The fire system certificate confirms the tenancy sprinkler configuration has been returned to base building specification, the system has been tested, and no live connections have been left open. This is typically the most strictly scrutinised certificate in the close-out pack because of the life safety implications.

Physical Strip-Out Sequence: Why Order Matters

Strip-out does not happen in a random order based on what is convenient to access first. The sequence exists for three reasons: safety, dust management, and protecting the base building substrate. Every deviation from the correct sequence either creates a hazard, generates rework, or damages something that then becomes a reinstatement cost.

Step 1: Ceiling Tiles and Grid

Ceiling tiles and the suspended ceiling grid are removed first. They are the lightest elements, and removing them first exposes the service zone above the ceiling for confirmation that all services have been correctly isolated before any partition is touched. It also sets up containment for the dust and debris that will be generated by partition removal. Starting with the ceiling allows the crew to work with visibility of the full service zone above, which is where the highest proportion of surprises occur.

What stays and what goes: Base building ceiling grids are retained. Tenant-installed suspended ceiling structures are removed. Check the base building drawings to confirm which grid elements are base building before any cutting or removal begins.

Step 2: Partitions

Partition removal proceeds from the top floor down in multi-storey tenancies. The reason is straightforward: if a floor is open, debris from partition removal on the level above will fall through. Working from the top down keeps debris contained on each level until it is cleared. Each level is worked, cleared, and the floor below is opened only when the level above is complete.

Demountable partitions (proprietary modular systems) are handled differently from fixed partitions. Demountable systems are disassembled panel by panel and either returned to the supplier, reused, or disposed of as a system. Fixed gyprock or masonry partitions are broken down and loaded out as demolition rubble. The disposal pathway is different and must be priced separately in the scope.

Step 3: Flooring

Flooring is removed last. This is the step that confuses people most. The reason: the floor surface protects the base building slab substrate from damage during all the other strip-out activity above it. If you strip the flooring first, every dropped tool, heavy debris load, and equipment movement is hitting the bare concrete slab. Damage to the slab creates a reinstatement cost that far exceeds the effort of protecting it. Flooring comes out only after all the debris above it has been removed and cleared.

Step 4: Joinery

Joinery removal requires a structural check before anything is cut away from a wall. Kitchen cabinetry, reception counters, and built-in joinery are sometimes fixed to structural elements of the base building or to partitions that carry loads. Cutting through a structural element that is concealed behind joinery creates an immediate hazard. The strip-out crew confirms each joinery element’s fixing method and connection to the wall structure before removal begins. Where a structural connection is suspected, the structural engineer is consulted.

Night Work and Live Building Logistics

Most major Sydney CBD and retail defits involve significant night work. The reason is not complicated. Other tenants are operating during the day. Noise from strip-out equipment, dust, and the movement of large waste loads through common areas during trading hours is not acceptable in a live commercial building. Night work is not an option in many buildings. It is the only option.

Goods Lift Booking Windows

In major Sydney retail centres and CBD office towers, goods lift access for construction work is strictly controlled. Typical night booking windows run from approximately 10pm to 6am. In high-traffic retail centres during peak periods, the usable window for heavy waste removal can be as narrow as 2am to 6am. Outside those windows, the goods lift is shared with cleaning contractors, restocking deliveries, and other building maintenance crews.

What needs pre-booking versus on-demand: large waste loads and skip bin exchanges need to be pre-booked with building management, often at least 48 hours in advance. Small tool movements and personnel access are typically managed on-demand within the approved access window. Crew supervisors need to know the lift schedule for every night of the defit so the programme can be built around it.

Rubbish Removal Timing

Waste must leave the building during the approved night access window. Loading docks in commercial buildings are often shared with food delivery and cleaning contractors in the early morning, so the window for construction waste removal is typically the middle section of the night. Waste that is not cleared within the window either sits in the tenancy (taking up working space) or requires a dedicated clearance run the following night. Scheduling waste removal as a separate programme item, not an afterthought, is what keeps the defit on track.

What Can and Cannot Be Done at Night

Hydraulic breaking and concrete cutting cannot be done at night in most commercial buildings regardless of floor isolation. The vibration and impact noise transmits through the structure and affects other floors. Tasks that can be done at night with appropriate controls include manual partition removal, ceiling strip-out, flooring removal, and joinery removal. Power tool use is governed by the building’s noise management conditions.

Crew Changeover in a Live Building

Night shift crews in commercial buildings must be inducted into the building before starting work, even if day shift crew members have already been inducted. Buildings require individual inductions because they track who is on site at any given time. Managing crew changeover for a defit that runs both day and night means two sets of inductions, two site registers, and a handover briefing between shift supervisors at each changeover. Skip this and the building manager will stop the work until it is rectified.

Building Management Coordination: What They Require and When

Building management in a major Sydney commercial property is not a single point of contact. There is typically a building manager, a facilities coordinator, a security manager, and a fire safety officer. Different approvals come from different people. Starting this process early is not optional if the defit needs to begin by a fixed date.

Before Work Starts

• Contractor induction: Every worker on site must complete the building’s contractor induction, often online plus an on-site component. Inductions must be current and registered with building management before any access is granted.
• Public liability insurance certificate: Minimum $20 million for most major Sydney commercial buildings. The certificate must name the building owner or manager as an interested party. Expired or non-compliant certificates will halt the job.
• Safe Work Method Statement (SWMS): Specific to the defit scope, not a generic document. Building managers in major properties review SWMS documents and can reject them if they do not reflect the actual work being done.
• Base building drawings: The contractor needs these to understand what is base building before any removal begins. Request them from building management as part of the pre-commencement coordination.

Access Permits

Access permits in major Sydney commercial buildings typically require 5 to 10 business days for processing. This is not negotiable. If the defit start date is fixed by the lease expiry, the access permit application needs to be submitted before the lease expires, not after. Permits cover the scope of work, the access hours, the approved areas, and the trade types involved. Any work outside the approved scope requires a variation to the permit, which takes additional time.

Common Restrictions

• No concrete cutting or grinding during occupied hours
• No debris in common area corridors at any time
• Goods lift must be padded before any large item is moved
• Waste bins must be covered when in transit through the building
• No unaccompanied contractors in common areas after hours

Hot Work Permits

Hot work (cutting, grinding, welding) requires a separate hot work permit issued by the building fire safety officer. Hot work permits are typically issued daily for the specific location and time, not as a blanket approval for the duration of the defit. A fire watch is required during and for a specified period after any hot work. The building fire safety officer defines the conditions.

After-Hours Contact

Before night work begins, confirm the after-hours contact in the building management team. This is the person who can resolve access issues, lift faults, or security queries at 3am. Every night shift supervisor should have this number before the shift starts. An unresolvable access issue at 3am that stops the waste run or locks the crew out of the lift does not just cost that night’s productivity. It compresses the programme and puts the lease expiry date at risk.

Close-Out Documentation: What Releases the Bank Guarantee

The bank guarantee does not get released because the defit looks finished. It gets released because the landlord has inspected the tenancy against the back-to-base specification, found it compliant, and received the complete documentation package. Every item below must be in order before you request that inspection.

Landlord Inspection

Request the landlord inspection in writing once the documentation pack is complete. The inspection is conducted by the landlord or their building consultant against the back-to-base specification, room by room. Prepare the tenancy in the order the specification lists items so the inspector can move through it systematically. A tenancy presented in logical order that matches the spec inspects faster and gives a better impression of thoroughness.

Rectification

If items are disputed at inspection, respond in writing to each one specifically. Do not accept a blanket list of defects. For each disputed item, either agree to address it with a completion date, or contest it with reference to the base building drawings or the specification language. Items that are genuinely unclear should be escalated to your solicitor, not resolved verbally at the inspection.

Bank Guarantee Release

The bank guarantee is released when the landlord provides written confirmation that the make-good obligations have been met to their satisfaction. Processing time through the bank is typically 5 to 10 business days after the landlord issues the release letter. If the landlord delays the release without cause after a passed inspection, request it in writing with a stated timeframe and note that further delay may be referred to your solicitor. Do not let it drift.