Who is responsible for what during office fit-out delivery?
A general contractor may lead the entire process, but does not replace the investor, designer or building manager. This guide shows who makes decisions, who develops solutions, who approves them and who is responsible for delivery — from the initial brief through handover and warranty.
The general contractor leads the process but does not take every decision away from the investor
A well-organised fit-out does not mean one company independently decides everything. It means every decision has an owner, a deadline, required inputs and a clear impact on cost, design and programme.
The investor defines the business objective, workplace functions, specification, budget and limits of acceptable change. Designers translate those decisions into architectural and MEP solutions. The building manager protects the building infrastructure and enforces its procedures. office general contractor organises delivery, coordinates the parties, contracts trade teams and is responsible for the scope entrusted to it under the contract.
Problems begin when responsibility for the outcome is confused with authority to make decisions. The contractor may recommend a substitution but should not independently change an approved specification. A designer may assess compliance but does not necessarily have authority to increase the budget. The building manager may approve an intervention in a building system but does not define the tenant’s workplace needs.
Usually the investor or a person formally authorised by the investor.
A designer, discipline specialist or contractor preparing the proposal.
The party that procures, organises, delivers, tests and rectifies defects.
Statutory, contractual and decision-making responsibility are three different layers of the process
In everyday discussion, the word ‘responsible’ is often used too broadly. A statutory technical role, a contractual obligation and the authority to make a business decision are three different things.
Statutory responsibility
It arises from applicable law and may apply to the investor, designer, construction or works manager and — where appointed — the investor’s supervision inspector.
Contractual responsibility
It arises from the contract. It defines who designs, supplies, installs, coordinates, commissions, documents and rectifies defects.
Decision-making responsibility
It defines who approves the layout, specification, cost, substitutions, deadlines and changes affecting the outcome.
Polish construction law identifies the formal participants in the construction process. Commercial fit-out also involves organisational and contractual roles such as the general contractor, project manager, tenant, landlord or building manager, building service providers and specialist suppliers. The role structure of each project should therefore be checked against its formal route, contracts and building guidelines.
The matrix below shows a practical allocation of activities in office delivery. It does not replace Polish construction law, the professional authority of statutory participants, the contractor agreement, design agreements or the fit-out guidelines of a specific building. More information on formal roles is provided by the General Office of Building Control (GUNB) ↗.
Four parties that most often shape office fit-out delivery
Even with a single general contractor, an office is delivered at the intersection of several centres of knowledge and authority. A clear process does not remove those parties — it structures how they work together.
Defines objectives, specification and decision boundaries
Decides on workplace functions, budget, priorities, acceptable changes and the date the organisation needs to occupy the office.
Translates decisions into delivery
Coordinates scope, prepares the programme, contracts trade teams, manages procurement, organises construction, controls quality and closes defects.
Develop and protect the design logic
Prepare documentation, coordinate disciplines within their scope, answer technical queries and review changes and equivalent solutions.
Protects the building and its systems
Issues guidelines, approves interventions, defines logistics and procedures and participates in handover of systems connected to the building.
Depending on the project, additional parties may include the landlord representative, supervision inspector, construction or works managers, fire-safety expert, IT, security, AV and furniture suppliers and specialist-system vendors. Their involvement does not change the core rule: every issue needs one defined decision route.
Who leads, who decides and who approves at each stage of office fit-out delivery?
The general contractor is responsible for organising and delivering the entrusted scope, but does not automatically take over investor decisions, designer responsibility or the building manager’s authority.
Structures the brief and identifies critical decisions.
Confirms needs, specification, budget and deadline.
Designers develop the documentation and the contractor coordinates it for construction.
The investor approves the specification; the building manager approves compliance with building requirements.
Manages the flow of samples, approvals and documents.
The investor approves the specification; the building manager approves procedures and interventions in the building.
Contracts trade teams, orders materials and secures delivery dates.
Approves substitutions and changes affecting specification or budget.
Organises construction, coordinates disciplines and is responsible for delivery of the scope.
The investor approves changes; the building manager monitors compliance with procedures.
Organises testing, measurements, snagging and handover documentation.
Confirm specification, quality of execution and integration with building systems.
Hands over documentation and warranties and activates post-completion service.
The investor accepts the office; the building manager closes the required building procedures.
A general contractor, construction manager, supervision inspector and project manager are not the same role
A company may lead a project as general contractor while designated individuals perform statutory technical functions or represent the investor. These roles may work within one team, but their responsibilities arise from different legal or contractual bases.
| Role | Basis | Primary task | What should not be assumed |
|---|---|---|---|
| General contractor | Works contract | Organisation, contracting, coordination, delivery and responsibility for the entrusted scope. | Does not make every decision about specification, function or budget without investor authority. |
| Construction / works manager | Law and professional qualifications | Proper and safe management of works within the relevant statutory technical function. | Is not automatically the commercial contracting party or budget owner. |
| Investor’s supervision inspector | Appointment by the investor or a formal requirement | Represents the investor’s interests and checks quality and compliance of the works. | Cannot simultaneously act as construction manager on the same site. |
| Project manager / investor coordinator | Contract and delegated authority | Organises decisions, communication, programme, reporting and escalation. | Does not replace statutory technical functions requiring appropriate professional qualifications. |
Not every tenant refurbishment follows the same formal route. Before works begin, establish whether the scope requires notification, a permit, a construction log, appointment of statutory roles or additional approvals. Landlord and building-management requirements are a separate issue covered in our guide to building-manager approvals and office fit-out formalities.
Five interfaces where responsibility most often becomes unclear
The biggest problems usually arise not within one package, but between parties. The work still has to be done even if no owner is identified in the documents.
Material substitutions
The contractor proposes; the designer checks performance and aesthetics; the investor approves cost and specification; and the building manager approves any impact on building systems.
Discipline clashes
Define who designs the correction, who approves its impact on the concept, who implements the change and how its cost is settled.
Variations
Without a defined procedure, the contractor waits for approval, the investor waits for a price, the designer waits for a decision and the programme loses more days.
Building approvals
The general contractor may manage the approval workflow, but the building manager must issue requirements, the designer must prepare documentation and the investor must decide within the programme deadline.
Testing and documentation
Define in advance who performs measurements, programs the system, issues test records, updates drawings and collects handover sign-offs.
If the answer to any task is ‘the other party will probably do it’, the scope is not closed. Every interface should identify the executing party, solution author, approving party and decision deadline.
How do you create a responsibility structure that actually works on site?
A list of participants is not enough. You need a decision system that defines not only ‘who’, but also ‘by when’, ‘based on what information’ and ‘what happens when no answer arrives’.
Define the required outcome
First define what must be handed over: a ready-to-use office, operating systems, documentation, tests, training and warranties.
Map packages and interfaces
Separate architecture, MEP, fire safety, IT/AV, furniture and building systems, then define the work that sits between them.
Assign four actions
For every issue identify who initiates, who develops, who approves and who executes.
Set response deadlines
Late material approval can block production. An RFI without a response deadline is not a management tool.
Define the change procedure
A change should show its impact on price, programme, design, orders and responsibility allocation.
Define escalation
When a decision blocks the critical path, it must be clear who takes ownership of the issue and how quickly the conflict is resolved.
W formule office Design & Build in one process some interfaces are resolved within the contractor’s team. This does not remove the need for timely investor decisions, building approvals and formal allocation of design responsibility.
What should be agreed before the final offer and contract signature?
This checklist does not replace the contract, but quickly shows whether the project has a clear decision structure.
Who is authorised to approve costs, materials and changes for the investor?
Who is responsible for keeping architectural and MEP documentation current and coordinated?
Who maintains the RFI, decision, revision and clarification registers binding on all parties?
Who prepares, reviews and approves materials and equivalent solutions?
Who obtains building-manager approvals and who owns the complete set of building-required documents?
Who designs and delivers discipline interfaces such as equipment power, controls and penetrations?
What is the process for raising, pricing, approving and instructing variations?
What response deadlines apply to the investor, designers, contractor and building manager?
Who organises testing, measurements, programming, handover and defect rectification?
Who prepares as-built documentation, warranties, manuals and the final handover package?
Explore delivery model, documentation, formalities and programme
This article answers ‘who?’. The related guides expand on ‘under which delivery model?’, ‘based on which documents?’, ‘with whose approval?’ and ‘within what programme?’.
Frequently asked questions about responsibility in office fit-out delivery
Who is responsible for office fit-out delivery?
The general contractor is responsible for delivering the scope included in its contract. The investor remains responsible for organising its own side of the process and making decisions about objectives, specification, budget and changes. Designers are responsible for design solutions, while the building manager is responsible for building requirements and approvals.
Does the general contractor make every decision for the investor?
No. The contractor should recommend, show consequences and manage the decision workflow, but without appropriate authority should not change function, specification, price or approved scope.
What is the difference between a general contractor and a construction manager?
The general contractor is the contracting party responsible for delivering the works. The construction manager or works manager performs an independent statutory technical function within the scope defined by applicable regulations and professional qualifications.
Who approves material substitutions?
The contractor prepares the proposal and shows its price and programme impact. The designer reviews compliance with the design, the investor approves the specification and commercial consequences, and the building manager participates when building requirements or systems are affected.
When should the responsibility matrix be prepared?
Ideally before final pricing and contract signature. This helps bidders price the same scope and allows the parties to define decision deadlines, the change procedure and documents required for handover.
The best responsibility model does not take control away from the investor — it removes gaps between parties
The investor should retain control over the objective, specification and budget. Designers should own the quality and consistency of solutions. The building manager should protect the building and its systems. The general contractor should translate these requirements into procurement, programme, work organisation, quality and handover.
A single-contractor model works not because one party can decide everything, but because someone actively manages the interfaces. That party runs RFIs, monitors approval deadlines, shows change impacts, integrates disciplines and drives the process to a clearly defined result.
The earlier decisions, scopes and response deadlines are assigned, the lower the risk that construction stops at the question: ‘who was supposed to do this?’
decision owner → solution author → approving party → contractor → handover and confirmation of the result.