Additions · Scope and permits · 2026 guide
Home Addition Guide for Miami
An addition is new construction attached to an occupied home. This guide explains the design, structural, and permit realities — and the cost drivers that shape scope per property, never as a package.
The drivers
What actually moves the number
The tie-in. How new meets existing — foundation interface, wall openings, rooflines, floor levels — is the defining technical question. Clean connections on a compatible structure cost less than reconciling mismatched levels, materials, and framing.
Structural and envelope scope. Foundation, framing, roofing, windows, doors, and exterior finishes form the shell. Each is sized to the addition and the code, and each is confirmed by drawings and engineering, not by rule of thumb.
Extended systems. Electrical, plumbing, and cooling extended into the new space — plus panel, water-heater, or equipment capacity where the existing setup is already committed. System capacity is verified before finishes are promised.
Interior finish level. Flooring, drywall, trim, paint, and any kitchen or bath scopes inside the addition finish the space to the standard of the rest of the home. Finish selections move the number the same way they do in any remodel.
Design and permit path. Drawings, engineering, applications, reviews, inspections, and closeout are real scope with real duration. Permitted and structural scopes are delivered through qualified trade partners selected for the project.
Timelines
How long an addition takes — honestly
An addition moves through design and engineering, permit review, shell construction, systems, and finishes — each with dependencies on the last. Weather exposure during tie-in, inspection scheduling, and selection timing all shape the sequence.
We provide a project-specific sequence after scoping and update it when design or approvals change. Treat any fixed duration offered before drawings and the permit path exist as a sales number, not a plan.
How pricing works here
Your price is scoped in writing after a walkthrough
Where a price range would help, here is the plain truth: additions vary too much by structure, lot, tie-in, and finish for any published band to mean something. A responsible number follows a property walkthrough, design discussion, and a defined permit path. Start with a free planning estimate and get a scope written for your house.