Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Hialeah Gardens
A home addition or ADU in Hialeah Gardens typically runs $45,000-$130,000 for a room addition and $90,000-$220,000 for a detached ADU, with garage conversions falling between $30,000-$80,000. Every quote we write includes a flat price, a written scope, and a documented photo record before any crew arrives. Call (786) 321-4970 to schedule your free estimate.
We serve Hialeah Gardens from our Miami office, with crews dispatched directly to the Okeechobee Road corridor, the residential pockets near West 68th Street, and the industrial flex spaces along the Florida Turnpike. Whether you’re expanding a 1980s CBS block home or converting warehouse space, we price the surprises before we find them.
Why Rowan Construction Group Miami Is Hialeah Gardens’s Preferred Home Additions & ADU Company
We’ve worked the narrow residential band of Hialeah Gardens long enough to know what opens up behind the stucco. Our Home Additions & ADU team has delivered projects across the city’s 1980s-1990s housing stock, and our documented photo record shows exactly what we found and what we fixed.
Our crews are background-checked and uniformed; a live person answers calls 24/7. Under Clause 1 of The Haven Standard, the price is written before anyone starts. Our 365-Day Done Right Promise is printed on every contract, backed by a terms page, not an asterisk. And our Free Second Opinion on any written estimate means you can bring a competitor’s quote and we’ll review it line by line at no charge.
Dispatch and scheduling are coordinated from our Miami office, but the crew that arrives in Hialeah Gardens knows the local conditions: the shallow limestone substrate, the high water table, the pre-Andrew CBS construction, and the Miami-Dade HVHZ requirements that invalidate materials approved elsewhere in Florida.
Our Home Additions & ADU Services in Hialeah Gardens
ADU Design & Permitting
ADU design in Hialeah Gardens starts with a slab and moisture plan, not a floor plan. Because the water table here sits within 2-4 feet of grade over shallow limestone, any new detached unit needs engineered dewatering, a below-slab moisture barrier, and capillary break detailing that most statewide designs omit. We handle the Miami-Dade Notice of Acceptance research ourselves, specifying only assemblies that carry the county’s independent product approval. A typical permitted ADU in Hialeah Gardens runs $90,000-$220,000.
Garage Conversion ADU
Garage conversions are the most common residential ADU we see in Hialeah Gardens, but they’re also where the pre-Andrew surprises hide. On a garage conversion ADU off the Okeechobee Road (US-27) corridor, our tech pulled the drywall to find the 1980s CBS wall had no moisture barrier and the existing subfloor was furred directly on a slab with no capillary break, so the rough-in inspection flagged water intrusion at the base plate. We priced the fix as a written change order before touching anything - below-slab moisture barrier, new pressure-treated base plate, and impact-rated openings that carry a Miami-Dade Notice of Acceptance - then pushed the punch list to include a HVHZ roof-deck attachment upgrade so the final inspection sign-off cleared the whole structure, not just the new room. Garage conversions in Hialeah Gardens typically run $30,000-$80,000.
New Detached ADU
A new detached ADU in Hialeah Gardens faces the same limestone and water-table constraints as any slab-on-grade construction here, plus the HVHZ wind-load requirements that govern every fastener, window, and roof-deck attachment. We engineer for 175 mph equivalent wind speeds, specify impact-rated openings with Miami-Dade NOA numbers, and document the slab prep with photos before the pour. The written scope includes the dewatering plan, the moisture barrier spec, and the elevation certificate if flood zone mapping requires it.
Junior ADU & Interior Conversion
Junior ADUs and interior conversions in Hialeah Gardens’ older CBS homes often trigger full electrical upgrades once the permit pulls the existing wiring into scope. We’ve opened walls to find aluminum branch wiring, ungrounded circuits, and unpermitted prior work that the inspector tags immediately. Our quotes include an allowance for electrical rough-in upgrades based on what we find during pre-construction inspection, and any surprise beyond that allowance is priced and approved in writing before we touch it.
ADU Site Prep & Utilities
Site prep for any Hialeah Gardens addition means dealing with the shallow limestone and seasonal water table fluctuations. We plan for aggressive dewatering during the dry season, specify pressure-treated base plates and below-slab moisture barriers as standard, and coordinate sewer and water tie-ins with Miami-Dade Utilities. The photo record starts at site prep and continues through final inspection.
Room Additions & Second Story Additions
Room additions on Hialeah Gardens’ 1980s-1990s CBS homes require careful matching of existing block and stucco, plus structural verification that the original slab and footings can handle the load. Second story additions are rare here given the modest residential footprint, but where structurally feasible, we engineer for HVHZ lateral loads and specify Miami-Dade-approved impact assemblies throughout.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Hialeah Gardens
We source across fifty-plus vetted brands, and for Hialeah Gardens additions and ADUs, that means specifying fixtures and assemblies that carry both Florida statewide approval and Miami-Dade Notice of Acceptance. For bathroom components in ADU wet walls, we stock Toto toilets and American Standard vanities with confirmed NOA numbers, avoiding the delays that come from specifying a catalog item the county rejects. For tile showers and wet-area waterproofing, we use Schluter membrane systems with documented Miami-Dade approval, installed per manufacturer spec so the inspection passes the first time. Our written quotes name the brand, the model, and the approval number - not “or equal.”
Common Home Additions & ADU Problems We See in Hialeah Gardens Homes
- Aluminum branch wiring and ungrounded circuits behind existing walls. Opening a 1980s CBS wall for a room addition often reveals electrical that predates modern grounding requirements. The permit triggers a full rough-in upgrade that was never in the original scope. We inspect before we quote and write an electrical allowance into every contract.
- Slabs poured with no capillary break over shallow limestone. Hialeah Gardens’ high water table means moisture wicks directly into furred subfloors. We specify below-slab moisture barriers and pressure-treated base plates as standard on any addition touching grade, and we photograph the prep before the pour.
- Materials with Florida approval but no Miami-Dade Notice of Acceptance. HVHZ rules invalidate many assemblies approved elsewhere in the state. We verify NOA status before specifying any window, door, roof fastener, or wall assembly, and we document that verification in the project file.
- Pre-Andrew roof-deck attachments that fail current HVHZ standards. Many 1980s structures in Hialeah Gardens lack the enhanced nailing patterns and structural panel fastening required post-Hurricane Andrew. We inspect existing roof structures during addition design and price the upgrade before permit submission.
Pricing for Home Additions & ADU in Hialeah Gardens, FL
Home additions and ADUs in Hialeah Gardens carry the premium you’d expect for HVHZ-compliant construction over challenging substrate, but the range is predictable once you know what’s being built and what condition the existing structure is in.
| Project Type | Typical Range in Hialeah Gardens |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
What moves the number: the condition of existing electrical and framing, the need for below-slab moisture management, the extent of HVHZ upgrades required on the existing structure, and the finish level specified. Under The Haven Standard, every quote is a flat price with a written scope and a written warranty. No change proceeds without a signed change order. That discipline is why our projects finish within a few percent of the agreed number. Call (786) 321-4970 for your free estimate - we’ll inspect, document what we find, and put the price in writing.
We Also Serve Cities Near Hialeah Gardens
Our crews work throughout Miami-Dade County, including Home Additions & ADU in Hialeah Gardens and neighboring Miami, Brownsville, Miami Beach, and Miami Springs. Every project carries the same written-price guarantee, documented photo record, and 365-Day Done Right Promise.
Serving Hialeah Gardens, FL - Our Local Coverage Area
We’re based in the Hialeah Gardens area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Home Additions & ADU in Hialeah Gardens
The 1980s-1990s CBS homes here were built before current electrical, moisture, and structural standards, and the permit process pulls any deficient existing work into scope. We control this with pre-construction inspection, written allowances for likely surprises, and a signed change order before any additional work begins. Call (786) 321-4970 for an exact quote - estimates are free.
Yes. Miami-Dade County enforces High-Velocity Hurricane Zone standards that are stricter than the rest of the Florida Building Code, including independent product approval through the Notice of Acceptance system. We specify only NOA-carrying materials and assemblies, and we document that verification in every project file. Call (786) 321-4970 for an exact quote - estimates are free.
Yes, but the slab and moisture detailing must be engineered for the shallow limestone and high water table typical of the area. We specify below-slab moisture barriers, pressure-treated base plates, and proper capillary breaks as standard on every garage conversion here. Call (786) 321-4970 for an exact quote - estimates are free.
We start with a geotechnical assessment of the limestone depth and water table, then engineer for aggressive dewatering during construction, a robust below-slab moisture barrier, and a capillary break between slab and any furred finish floor. The spec is written into the contract and photographed before the pour. Call (786) 321-4970 for an exact quote - estimates are free.
The permitted scope includes the new structure, any required upgrades to existing electrical, structural, or envelope systems that the inspector flags, and full HVHZ compliance for the combined building. We price the likely existing-system upgrades as an allowance in the original contract, then handle any surprises with a signed change order before work proceeds. Call (786) 321-4970 for an exact quote - estimates are free.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Hialeah Gardens since 2007.