Interior design proposals can be difficult to compare because firms package services differently. One may lead with a single fee, another with multiple stages, another with a construction offer. The client’s job is to convert those different presentations into a common decision framework.

Start by confirming everyone answered the same brief

If one bidder assumes a 500 m² office, another assumes 450 m² and a third excludes furniture, their totals are not directly comparable. Issue clarifications before scoring so each proposal responds to the same project objectives, area, service expectation and target programme.

Build a simple evaluation scorecard

Useful comparison headings

  • Understanding of the brief.
  • Relevant sector and project experience.
  • Design approach and team capability.
  • Scope and deliverables by stage.
  • Programme and availability.
  • Technical and consultant coordination.
  • Site and delivery involvement.
  • Professional fee or construction price basis.
  • Exclusions, assumptions and reimbursables.
  • References, governance and communication approach.

Do not score fee without scope

A lower design fee may exclude technical documentation, procurement support or site review. A higher fee may include specialist coordination and more complete deliverables. Convert every proposal into a stage-by-stage matrix before deciding whether the fee difference represents better value, unnecessary scope or a genuine commercial advantage.

Test project evidence

Relevant experience should be specific enough to interrogate. Ask what the firm did, which team members were involved, what constraints were encountered and whether the project was completed. For specialist sectors such as laboratories and healthcare, generic commercial-interior experience should not automatically be treated as equivalent.

Interrogate the programme

A very short programme can look attractive but may simply omit client approvals, consultant coordination, landlord review, procurement lead times or mobilisation. Ask what decisions the proposed dates depend on and what happens if those decisions move.

Separate presentation quality from project quality

A polished pitch is helpful, but the proposal should also demonstrate how the project will be governed after appointment. Look for clear outputs, responsible people, decision gates, commercial assumptions and a route for managing changes.

Before award, reconcile the preferred proposal

  1. Confirm final scope and exclusions in writing.
  2. Attach or reference the agreed brief.
  3. Confirm the fee basis, taxes and payment milestones.
  4. Confirm the programme and information required from the client.
  5. Identify the project lead and approval contacts.
  6. Agree how additional services and changes are instructed.
  7. Confirm ownership and permitted use of project documents.