CM or GC? How Your Fit-Out Gets Built

Before a single drawing is stamped, you make a decision that quietly governs the whole project: how it gets delivered. The same fit-out, run as a fixed-price job versus a construction-management engagement, can carry very different budgets, risk and pace. Here's how the main models differ — and which tends to fit which kind of interior.

General contractor versus construction manager

General contractor, fixed price

A general contractor takes a finished design and builds it, coordinating the trades. On a lump-sum (stipulated-price) contract the price is locked: the contractor carries the risk of overruns, and any savings stay with the contractor.

It's the cleanest path when your scope is fully designed and stable and you want pricing risk transferred early. The trade-off is rigidity — once it's signed, changes mean change orders, because a fixed price assumes a fixed design.

Construction management

A construction manager is brought in early, during design, as a professional extension of your team — usually on a fixed fee. Because the CM isn't betting on a lump sum, their interests line up with yours on budget, schedule and quality, and the builder's perspective shapes the design before it's final.

It suits projects that are fast-tracked or phased, where the scope is still evolving, or where you want open-book transparency and an early, realistic budget. We've run retail builds this way — pricing developed openly across several budget passes, so the client could decide with real numbers in front of them.

The hybrids: GMP and design-build

GMP — the middle ground

A guaranteed-maximum-price contract — often called construction manager at risk — caps the total. The contractor absorbs overruns above the cap, but savings below it come back to you. It's cost certainty with flexibility: a ceiling, without locking the design as hard as a lump sum.

Design-build

Design and construction sit under one contract, so pre-construction and design overlap. The builder is in the room for design decisions — less risk of something beautiful but unbuildable — and accountability is single-point. It tends to suit fit-outs where speed and one point of responsibility matter, like retail with a hard opening date.

Lump sum buys you a fixed number. Construction management buys you a partner whose savings come back to you. The right pick depends on how settled your design is.

So which one fits your fit-out?

None of this is a rule — but a few patterns hold up across most interior projects:

• Office TI, fully designed, stable scope — a lump-sum GC is often the cleanest path.
• Fast-track or phased, or you want transparency and an early budget — construction management or GMP.
• Lab, medical or MEP-heavy interior where buildability dominates — CM, GMP or design-build, to get the builder into design early.
• Retail on a tight opening date — design-build or CM, for speed and single accountability.

The right answer depends on how settled your design is, how much risk you want to hold, and how much you value transparency over a single fixed number. That conversation belongs at the budgeting table, early — Enduro works as both general contractor and construction manager, so it can start with your project, not our preferred contract. You can also browse recent projects to see both models in practice.