Commercial construction timelines in Sydney depend on the delivery model chosen before design begins. Traditional tendering runs the longest program because design and construction proceed in sequence. 

Design and construct compresses the program by overlapping design and early construction packages. Construction management shortens the program further through concurrent trade packages. Fitout and refurbishment timelines follow project scope rather than a fixed delivery model.

Traditional Tendering Timeline

Traditional tendering runs the longest program because design and construction proceed in sequence, not overlapping stages.

• Design phase: 3 to 6 months for full documentation before tender.
• Approvals and tender: 2 to 5 months for council approval and builder bidding.
• Construction phase: 8 to 18 months or more, since building cannot start until design and contract are locked.

Total program length runs 14 to 26 months or more on a mid to large commercial project. Approval pathway and site conditions move this range in either direction.

Early Contractor Involvement (ECI) Timeline

Early Contractor Involvement shortens the gap between design and construction start, though it does not carry a separate total duration figure of its own.

ECI brings a builder into cost and buildability decisions before design is finalised. This reduces rework and mobilisation delay once construction begins. ECI then transitions into either a design and construct or construction management contract, and the build phase that follows takes on the timeline of whichever model is adopted.

Design and Construct (D&C) Timeline

Design and construct compresses the total program to 9 to 18 months by overlapping design and early construction packages.

• Design and approvals: 2 to 4 months, often faster where a Complying Development Certificate pathway applies instead of full council review.
• Construction phase: 6 to 12 months, since early packages such as piling or substructure can start while upper level design is finalised.

Single point contractor accountability under this model removes the handoff delay that slows traditional tendering. Our design and construct service sets out how this integration works on a live program.

Construction Management Timeline

Construction management runs 8 to 16 months by breaking the build into overlapping trade packages instead of one sequential program.

• Planning and early packages: 2 to 4 months for initial design and trade procurement.
• Construction phase: 6 to 14 months, with multiple trade packages built concurrently.

This model suits high complexity or phased projects, though the overlapping packages depend on tight trade coordination and material procurement. Delays in either area extend the program faster than under a single sequential contract. Our construction management service coordinates this trade sequencing directly.

Fitout and Refurbishment Timelines

Fitout and refurbishment timelines follow the scope of works rather than a fixed delivery model, and range far more widely than a new build program.

Commercial Fitout Timeline

A small tenancy fitout takes a few weeks to complete. A full floor or base building fitout extends to several months depending on services complexity and finish grade. Our commercial fitout service scopes this against the specific tenancy before a program is confirmed.

Commercial Refurbishment Timeline

Minor refurbishment work takes a few weeks for cosmetic upgrades. Major structural refurbishment extends past a year where the building stays operational during works. Live environment sequencing adds time that a vacant refurbishment does not carry. Our commercial refurbishment service plans around occupied sites where required.

What Moves These Ranges

Approval pathway, site occupancy and trade availability move a timeline more than the delivery model alone.

A Complying Development Certificate pathway removes months from council-dependent approval stages. A live, occupied site adds sequencing time that a vacant site does not require. Sydney trade and material availability shifts construction phase duration independent of the contract model chosen.\

Choosing a Delivery Model for Program Certainty

Delivery model selection sets the realistic completion date before a head contract is signed, not after.

Tau Constructions delivers projects under early contractor involvement, design and construct, and construction management models across Sydney. Confirming the right model for a project’s scale and site condition protects the completion date from the outset, and our team sets out the tradeoffs for each model before tender.

Frequently Asked Questions

How long does commercial construction take in Sydney? 

A mid to large commercial project takes 8 to 26 months depending on the delivery model, project scale and approval pathway. Fitouts and minor refurbishments run in weeks to a few months rather than a full program length.

What are the phases of a commercial construction project? 

The core phases are design, approvals, procurement, construction and handover. Overlapping stages under design and construct or construction management compress these phases against the sequential traditional tender model.

How long do approvals take before construction starts? 

Council development approval typically runs 2 to 5 months. A Complying Development Certificate pathway, where the project is eligible, reduces this stage significantly.