A standard interior fit-out process runs through 5 consecutive steps: detailed cost estimate, contract signing, production and installation, handover acceptance, and finally warranty and maintenance. At AIC, installation time is a reference 20–30 days depending on the quantity and complexity of the work; every project is handed over with a warranty of up to 24 months and a scheduled maintenance plan. This article walks through each step so owners know exactly where they stand in the timeline.

Interior fit

Step 1: Prepare the cost estimate

Once both sides agree on the design, the estimating team breaks down each work package to produce a realistic total. A complete estimate (BOQ) usually includes:

  • Quantities and unit prices for materials: engineered wood, stone, tile, glass, paint…
  • Quantities and unit prices for hardware, equipment and furniture product data.
  • Labour, transport and installation costs.

Thanks to a standardised take-off process, AIC can draft a BOQ estimate in about 4 working hours so owners can size their budget before signing.

Step 2: Sign the construction contract

Once the estimate and unit prices are agreed, both parties sign the construction contract. It is drawn up in two legally equal copies, one per party, as the basis for execution and payment. The owner pays the first instalment per the contract schedule; the contractor is responsible for delivering to the agreed design, materials and timeline.

Step 3: Production and installation

Based on the agreed technical requirements, types and materials, the contractor manufactures in the workshop and installs on site. With two in-house workshops (1,200 m² and 600 m²), most timber components are fabricated under quality control before reaching the site — shortening assembly time and reducing dimensional errors. Reference build and install time is 20–30 days, subject to change for unforeseen or force-majeure factors.

Step 4: Acceptance and handover

On completion, the owner and the technical supervision team inspect quality, quantity and volume. If everything matches the commitment, both sides sign the acceptance minutes, hand over and liquidate the contract. The owner settles the remaining cost per the contract.

Step 5: Warranty and maintenance

Every project is handed over with a warranty of up to 24 months and a scheduled maintenance plan. Maintenance catches early issues such as misaligned hinges, surfaces warping from humidity, or joints that need re-tightening — small tasks that shorten furniture life if ignored.

Why keep design and build under one point of contact

When designer and contractor are separate, the owner often ends up refereeing every time the drawing and the site disagree. A single-point design-build model brings design, take-off, production and installation under one accountable roof — reducing finger-pointing and keeping consistency from concept to finished product. AIC follows this model, with over 10 years in the trade (predecessor Nhan Viet from 2016, AIC founded in 2019); for advice on a specific interior fit-out project, you can talk to the AIC team directly.

Frequently asked questions

How long does interior fit-out take?

Installation time is a reference 20–30 days, depending on volume and complexity. Workshop fabrication typically takes 7–10 days, with the rest being on-site installation and cleaning.

How long is the furniture warranty?

AIC provides a warranty of up to 24 months plus scheduled maintenance after handover, addressing issues from use or humidity early.

Is payment required before construction?

Yes. Per standard contract practice, the owner pays the first instalment on signing, with later instalments tied to acceptance and handover milestones.