MEP Design Deliverables, Stage by Stage: Concept to GFC to As-Built

A client should expect MEP design deliverables at six stages: concept (design basis and load estimate), schematic design (single-line and system diagrams), detailed design (calculations, layouts and statutory drawings), tender (BOQ and specifications), good-for-construction drawings, and as-built records with manuals. Each stage should end with a named set of documents that you can accept, comment on or reject.

What documents belong to each stage?

Use this table as the deliverables schedule in your consultant's appointment. If a stage in your appointment lists only "MEP design", ask for the rows below to be written in.

What must the client supply and decide at each stage?

Delay in design usually comes from missing client inputs, not from drawing time. Agree these in the appointment so the consultant's clock and yours are the same.

What is the difference between GFC and as-built?

GFC drawings are the design issued for construction, and they should be frozen and numbered by revision. As-built drawings record what was installed after site changes. The Government of India's Manual for Procurement of Works (Second Edition, 2025) is explicit about the second set: on completion the contractor hands over the work with an inventory, as-built drawings, maintenance manuals or standard operating procedures for equipment, and clearances and certificates from statutory authorities, and a completion report follows. A private owner can copy that list into the contract. Without it, the only record of what was built is the memory of the site team.

Where do these stages go wrong?

• Statutory drawings and GFC drawings drift apart. The Fire NOC set is approved at one revision and the contractor builds from another. Put both on the revision register.
• Builder's work drawings are missing. Openings and sleeves that are not in the civil drawings are cut on site afterwards.
• The design basis is never signed. When loads grow, nobody can say whether the design or the brief changed.
• Redundancy is left implicit. State whether the building must survive the loss of one transformer, one chiller or one fire pump.
• As-built is not paid for. Make it a stage with its own deliverables and a milestone.

A revision register is a one-page list of every drawing, its current revision, the date and the purpose of issue: for approval, tender or construction. Ask the consultant to keep it and attach it to each issue. It shortens most disputes about which drawing governs, and it shows the fire officer and the electrical inspector that the set they reviewed is the set being built.

If BIM is part of the scope, say at which stage each discipline model is delivered and how clash resolution is evidenced. The MEPF cost calculator is useful at stage 1 to test a budget against the concept.

How should design payments follow the stages?

The Government of India's Manual for Procurement of Consultancy Services (Second Edition, 2025) makes two points an owner can borrow. First, a lump sum contract is based on output and deliverables, so draft deliverables should be checked carefully before a stage payment is released. Second, it discourages percentage-of-project-cost contracts for architectural and engineering services unless they rest on a fixed target cost and precisely defined services, because they give no incentive for an economical design. It also advises that extra services in a lump sum contract are covered by a timely amendment. Our article on how MEP consultant fees are structured compares the fee models.

What does a technical review of a design check?

If a design already exists, an independent review can test it at any stage. A useful review reads the design basis against the loads, checks calculations against the schedules, compares the single-line diagram with the layouts, tests the fire scheme against NBC 2016 Part 4 and the state's practice, and lists what the approvals bodies are likely to query. The output is a short list of observations with an owner and a priority, not a redesign. Our MEP design and approvals service offers this as a standalone appointment.

How Secured Engineers helps

MEP design is done in-house across electrical, HVAC, plumbing, fire and ELV, and we prepare and file the Fire NOC, CEIG and DISCOM papers ourselves, so statutory drawings and GFC drawings stay on one revision register. Design can be appointed alone, or MEPF and solar can sit under one contract. We work from offices in Noida (Delhi NCR) and Ludhiana, with 535+ projects across 18+ states and 89.77% repeat clients.

If you have a design at any stage, send the drawings and the brief, and we will review them and list what is missing. Start from the design and approvals page, message us on WhatsApp, call +91 70099 85817, or ask for a free proposal.