General Contractor Cost · Miami · 2026
How GC fees actually work, the typical market ranges, and what separates a fee that protects your budget from one that doesn't — from a licensed general contractor who builds here.
The short answer: in the Miami market, a general contractor's fee typically runs 10% to 20% of construction cost — charged either as a management fee on a cost-plus contract or built into a lump-sum price. On smaller renovations the effective percentage is higher; on large ground-up builds it compresses. But the percentage is the least useful number here: how a contractor charges, and how disciplined the scope is, moves your total cost far more than the headline fee.
Below is how GC pricing is structured, what the fee actually pays for, what drives the number in Miami-Dade, and the question that matters more than "what's your percentage."
How you're charged
Nearly every legitimate residential contract in South Florida is one of these two structures. (Be wary of open-ended hourly or "time-and-materials" arrangements on a full project — they put the schedule risk on you.)
You pay the actual cost of labor and materials, plus the contractor's fee for managing the build. The fee is either a percentage of cost (commonly 10–20% in this market) or a fixed management fee agreed up front. Costs are open-book, so you see what everything actually costs — good for custom work where the scope evolves.
The contractor prices the entire scope and gives you one fixed number. Their fee is built in, not itemized. It's cleaner to budget against and shifts pricing risk to the contractor — but it only works when the scope is fully engineered before signing, or change orders erode the "fixed" price fast.
Fee vs. cost of work
Homeowners often see a contractor's fee and think of it as markup. It isn't. The fee is what pays for the contractor to run the project — separate from the cost of the actual construction, which you'd pay to the trades regardless. For that fee, a real general contractor is carrying:
A quote that looks cheaper because the "fee" is low often just means those responsibilities are being under-resourced — and you pay for it later in change orders, failed inspections, and schedule slips.
What moves the number
Two projects of the same square footage can carry very different fees. Here's what actually moves it:
The fee percentage is usually higher on a small bathroom than on a ground-up home — the overhead of running a job doesn't shrink proportionally. Structural work, additions, and multi-trade scopes carry more coordination than a cosmetic refresh.
Custom, high-end, and evolving scopes lean toward cost-plus because no one can fix-price the unknown. A fully-designed, spec'd project can be lump-summed — which usually means a tighter, more predictable fee.
Miami-Dade permitting, flood-zone and HVHZ requirements, HOA and condo approvals, and lot conditions all add management load. More agencies and more unknowns mean more of the contractor's time — see permit costs & timelines.
This is the hidden driver. A build priced before it was engineered invites change orders that inflate the real total far beyond the quoted fee. Scope discipline up front matters more than the headline percentage.
The real question
Comparing contractors on fee percentage alone is how homeowners end up over budget. A lower fee on a vague, under-engineered estimate almost always costs more in the end than a fair fee on a scope that was fully priced before anyone broke ground. The change orders are where budgets actually blow up — not the fee line.
The better questions: Was the estimate engineered from real plans, or ballparked per square foot? How are change orders handled? What's included, and what's excluded? That's where a fee earns — or loses — its value.
JMK works on cost-plus with a fixed management fee, or lump sum where the scope supports it — never open-ended hourly. And we don't quote a blanket percentage sight-unseen: we scan the site, engineer the scope, and give you a specific number tied to your actual project, so the fee reflects real work, not a guess.
Common questions
Related
The two ways you're charged, compared — and what aligns your builder's incentives with yours.
What permits cost, how long they take, and why Miami Beach runs slower.
Per-square-foot ranges by tier, a phase breakdown, and the Florida factors that drive the number.
Our ground-up build process — engineered estimates, 3D LiDAR, full permit management — from lot to keys.
For homeowners who want exactly what they envisioned. We work with your architect or bring one in.
Full-gut renovation — every system, coordinated and permitted, under one accountable contract.
Skip the blanket percentage. Tell us about your project — we'll review the scope and give you a fixed, engineered estimate tied to the actual work, not a guess.
