ADU — Detached 1-bedroom Cost in Miami, 2026

Why detached 1-bedroom × Miami produces this band

A detached 1-bedroom scope for a adu in Miami combines two price levers: scope and metro labor rates. A detached 1-bedroom ADU is the category anchor: 500-750 SF standalone unit with a full kitchen, full bath, and bedroom. Separate foundation, roof, MEP, and entrance. Against the national median remodel labor rate, Miami runs 10% above the national median — so the detached 1-bedroom band comes in at the mid-range, then scales 10% above the national median on top of that. Permit timelines for residential work in Miami typically run 6-14 weeks, which is the window you plan your design and decision sequence against. This page gives you the actual 2026 Miami bands for this exact combination, plus the three cost drivers Baily asks about first when scoping the project live.

What drives cost for a detached 1-bedroom scope

• ·New foundation (slab-on-grade or stem-wall)
• ·New roof system and weather envelope
• ·Full MEP rough-in from the street (water, sewer, gas, electric)
• ·Site prep, grading, drainage

What makes Miami different

• Labor — HVHZ-certified impact-window installers and roofers are in high demand — commonly booked 10-16 weeks out.
• Labor — Post-hurricane insurance-repair cycles pull labor into cycles that compress remodel availability.
• Labor — Bilingual (English/Spanish) crew standard; reduces coordination overhead on most residential jobs.
• Material — Impact-rated glazing + hurricane shutters carry 35-60% premium over non-impact equivalents.
• Material — Coastal-grade (316 stainless steel) hardware adds 10-15% vs standard 304.

Miami rules that affect this scope

• Miami-Dade and Broward County HVHZ codes require Product Approval (NOA) for every impact window, door, and roof system — non-NOA products fail inspection.
• FEMA flood-zone requirements affect ground-floor scope in Zone AE and VE parcels — foundation and utility placement limits apply.
• Florida Building Code 2023 (FBC) wind-mitigation checklist directly affects homeowner insurance premiums post-remodel.
• Miami-Dade RER permits via iBuild — homeowner-direct for small scopes; GC-required for most kitchen/bath/addition work.

Scope your adu with Baily.

Baily asks the eight questions that determine where your project lands inside the $198K-$418K band for Miami and hands the scoped brief to one licensed builder.

Related pages

Questions LA homeowners actually ask

• What is the 2026 cost range for a detached 1-bedroom scope adu in Miami?

  $198,000-$418,000, with the median landing near $308,000. The range reflects finish tier and layout complexity within the detached 1-bedroom scope; the Miami labor multiplier of 1.10× vs national median is baked in.

• How long does a detached 1-bedroom scope adu take in Miami?

  26-40 weeks of on-site construction for the detached 1-bedroom scope, plus 6-14 weeks of permit review in Miami if the scope requires a permit. Cosmetic-only refreshes often skip permits; anything touching plumbing, electrical, or structural does not.

• What is the single biggest budget-overrun risk for this scope?

  Sewer connection — if the existing lateral runs under the new foundation line, a new lateral cut plus utility easement and right-of-way bond can add $12-22K.