New Detached ADU in University Park - Same-Day Service, Done Right the First Time

What Does a New Detached ADU Cost and Take in University Park?

A new detached our Home Additions & ADU in University Park runs between $90,000 and $220,000 for a complete build, with most projects finishing in 4 to 7 months from permit approval to final inspection. That range covers everything from a compact 400-square-foot studio to a 1,000-square-foot two-bedroom unit with full kitchen and bath. Call (844) 665-0162 and we’ll walk your lot, check setbacks against Miami-Dade’s HVHZ requirements, and give you a written estimate with real numbers.

Call (844) 665-0162

How We Build a New Detached ADU in University Park

We’ve learned that homeowners stay sane when they know what’s happening when. Here’s the actual sequence we follow on every new detached ADU in University Park, with the decisions you’ll need to make at each point.

Stage 1: Site survey and HVHZ material submittal (Weeks 1-3)

We measure your lot, confirm setbacks to property lines, and check existing utility locations. This is where we also submit our material list to Miami-Dade for NOA verification, every product that will touch your ADU. You’ll decide on unit size and preliminary layout here. A 400-square-foot studio keeps you under the threshold that triggers additional parking requirements in some University Park subdivisions. Go bigger and we’ll need to address that in the design.

Stage 2: Design development and permit drawings (Weeks 4-8)

Our architect produces stamped drawings showing foundation type, wall assembly, roof system, and impact-rated openings. You’ll choose between stick-built construction on a monolithic slab or a prefab unit from partners like Mighty Buildings or Boxabl. Prefab shortens onsite build time but requires crane access, which some University Park lots with overhead FPL lines can’t accommodate. You’ll also finalize kitchen layout, bath configuration, and whether the unit needs its own electrical service or can sub-meter from the main house.

Stage 3: Foundation and rough utilities (Weeks 9-14)

We excavate for slab or stem walls, install sewer lateral and water line from the main house, and rough in electrical conduit. In University Park, this stage demands sealed forms and same-day pours because the water table sits within two to three feet of grade, especially during the June through October rainy season. Any trench left open overnight can flood, washing out compaction and triggering a redo. You’ll make your final selections on flooring, cabinetry, and countertop materials during this window so we can order with lead times factored for our Small Bathroom Remodels service in University Park.

Stage 4: Structure, envelope, and MEP rough-in (Weeks 15-22)

Walls go up, roof gets sheathed and dried in, and we install impact-rated windows and doors, every one carrying that Miami-Dade NOA sticker the inspector will look for. Plumbing, electrical, and HVAC get roughed in. You’ll do a walkthrough to confirm outlet locations, switch positions, and any data cable runs before insulation and drywall close the walls.

Stage 5: Finishes, final inspection, and certificate of occupancy (Weeks 23-28)

Flooring, cabinets, countertops, fixtures, and appliances go in. We schedule Miami-Dade’s final inspection, which includes a blower door test and verification that all HVHZ products match the approved submittal. You’ll do a punch list walkthrough with our project manager. Once the CO is issued, the ADU is legally rentable or occupiable.

The Build Options You’ll Actually Choose Between

Every new detached ADU in University Park forces real trade-offs. Here’s what we see homeowners weighing:

• Stick-built vs. prefab: Traditional framing on a poured slab gives unlimited customization and typically appraises higher, but takes 5 to 7 months. Prefab options from Plant Prefab or Boxabl cut onsite time to 6 to 10 weeks and arrive with HVHZ engineering pre-approved, though you’re working within their module dimensions and facade options. Budget overlap is significant, prefab isn’t automatically cheaper once crane rental and site prep are factored.
• Foundation type: Monolithic slab on grade is standard for University Park’s flat lots and high water table. Elevated stem walls add $8,000 to $15,000 but protect against flooding and create usable storage underneath. We only recommend elevation if your lot sits in a documented flood zone or if the ADU will house electronics or valuable equipment.
• Impact window grade: Standard HVHZ-rated vinyl frames from PGT or CGI meet code at lower cost. Upgrading to aluminum-clad architectural grade from Andersen or Pella adds $4,000 to $9,000 depending on unit size, but the thermal performance and resale value difference is measurable in South Florida’s climate.
• Kitchen spec level: A full kitchen with range, refrigerator, dishwasher, and cabinet run adds $12,000 to $28,000 depending on whether you choose KraftMaid semi-custom or Wellborn’s full-custom line with soft-close and dovetail construction. Some homeowners building a rental ADU spec durable, replaceable finishes. Those building for aging parents tend toward higher-grade materials they’ll live with long-term.
• Utility independence: Sub-metering from the main house saves $3,000 to $6,000 in electrical service upgrades but complicates landlord-tenant billing. Separate meters add upfront cost and require FPL coordination that can extend permitting by 3 to 4 weeks.

What New Detached ADU Costs in University Park, FL

A new detached ADU in University Park typically costs between $90,000 and $220,000. That’s a wide range because the variables are real and specific.

Jobs land at the low end when we’re building compact, connecting to existing utilities, and selecting proven mid-grade materials that carry the required NOA. The number climbs with square footage, elevation, separate services, and premium finishes. What our written estimate includes: all labor, materials, permits, inspections, and project management. What it typically doesn’t include: FPL service upgrade fees, separate water meter installation, landscaping restoration beyond basic grading, or furniture and decor.

Call (844) 665-0162 for an exact quote on your lot. Estimates are free and come with a line-item breakdown, not a single vague number.

What University Park Homes Specifically Do to This Job

University Park sits entirely within Miami-Dade County’s High Velocity Hurricane Zone, the most stringent construction jurisdiction in the United States. Every building product, from roofing fasteners to windows to the adhesive under your flooring, must carry a Miami-Dade Notice of Acceptance that doesn’t exist in neighboring Broward County. We’ve watched out-of-area contractors arrive with Florida Building Code-compliant materials that nonetheless lack this separate NOA, triggering inspector rejections and forcing expensive last-minute substitutions. Our crew vets every product in the submittal phase, long before the first truck rolls to your lot near Florida International University.

The housing stock here is dominated by concrete block structure homes built primarily in the 1970s through 1990s, many substantially rebuilt after Hurricane Andrew to meet updated codes. That means your main house likely has solid utility capacity, but we still verify amperage and sewer line condition before designing the ADU tie-in. The western edge position, adjacent to Everglades drainage systems, means any below-slab work demands sealed forms and rapid pours. We’ve had June afternoons where a trench flooded in four hours. We don’t schedule foundation work during afternoon thunderstorms, and we keep pump trucks on standby during pour days.

Proximity to FIU also means some University Park properties fall under homeowners associations with additional architectural review requirements beyond city and county permits. We pull those documents in week one, not week six.

Frequently Asked - New Detached ADU in University Park

Ready to Expand Your Property in University Park?

We’ll walk your lot, check setbacks and utility access, and deliver a written estimate for your new detached ADU with real numbers and a real timeline. No pressure, no vague promises. Call (844) 665-0162 to schedule your free on-site consultation in University Park.

Written by Raymond Estevez, Owner at Groundwork Construction Co., serving University Park and South Florida.