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 Doral
A home addition or ADU in Doral typically runs $45,000-$130,000 for room additions and second-story builds, while detached ADU construction ranges from $90,000-$220,000 depending on size, utilities, and site constraints. Most Doral projects require 4-8 months from permit to final inspection, with the timeline driven more by Miami-Dade NOA material approvals and tight-lot logistics than by construction itself. Call (786) 321-4970 to schedule your free written estimate - our crews serve Doral from our Miami office, and we’ll put the full scope and price in writing before anyone picks up a tool.
We’ve worked in Doral’s master-planned communities from Doral Isles to the townhomes near Downtown Doral and the CBS homes off NW 107th Avenue. The lots are tight, the HOAs are active, and the building department enforces Miami-Dade’s NOA product approval system strictly. That combination changes how we quote, stage, and schedule your job. We account for it upfront so the number you agree to is the number you pay.
Why Rowan Construction Group Miami Is Doral’s Preferred Home Additions & ADU Company
We’ve delivered written quotes on over 4,000 projects since 2007, and the Doral jobs stand out for one reason: nearly every one starts from a post-1992 CBS structure built to High Velocity Hurricane Zone standards. That means the framing is solid, the uplift straps are already in place, and the challenge isn’t structural remediation - it’s logistics on a constrained site with an HOA watching the curb. Our Home Additions & ADU team knows the difference.
Doral customers find us the same way they research appliances: they read the three-star reviews, they want the price range on the page, and they expect a text confirmation after the call. We deliver all three. A live person answers our phones 24/7, every crew member is background-checked and uniformed, and every visit produces a documented photo record included as standard - not an upgrade.
Our 365-Day Done Right Promise applies to every Doral project: if it is not done right, we make it right. The guarantee is printed on every page and backed by a terms page, not an asterisk. And under Clause 1 of The Haven Standard, the price is written before any work starts - always.
We also offer a Free Second Opinion on any written estimate. Bring a competitor’s quote and we’ll review it line by line at no charge.
Our Home Additions & ADU Services in Doral
ADU Design & Permitting
ADU design and permitting in Doral starts with a site survey that accounts for more than setback and square footage. The city’s post-2003 building department enforces Miami-Dade NOA approvals on every roofing fastener, impact glazing unit, and underlayment sheet - materials carrying only a generic Florida Building Code approval will fail inspection and require full replacement at your expense. We spec NOA-approved products from the first line item so the permit package moves through plan review without a material revision. Our design team coordinates with Doral’s municipal engineers on flood-zone compliance for properties in FEMA AE areas, where finished floors must meet Base Flood Elevation standards. The permit timeline typically runs 6-10 weeks, and we include that in our written schedule so you know when breaking ground is realistic.
Garage Conversion ADU
Garage conversion ADUs are popular in Doral’s gated communities where lot coverage limits rule out detached construction. The existing garage slab often sits below FEMA AE flood elevation, which means the floor must be raised or the living space elevated on a new stem wall before insulation and finishes go in. We identify this requirement during our first site visit and include the elevation work in the written quote - not as a change order discovered at rough-in. A typical Doral garage conversion runs $30,000-$80,000 depending on whether the slab stays or gets lifted, whether the roofline needs modification for HVHZ uplift compliance, and how the kitchen and bath utilities tie into the main house. We’ve converted garages in Doral Isles and near the Blue Monster golf course; in each case, the HOA required party-wall notice to adjoining neighbors and restricted material staging to the driveway, not the street.
New Detached ADU
Detached ADU construction in Doral faces the tight-lot reality of master-planned communities where side setbacks can be 10 feet or less and HOAs prohibit curb-side material storage. We built a detached ADU behind a CBS home in the gated enclaves off NW 107th Avenue, and the first two weeks were mostly logistics: the Miami-Dade NOA-approved impact glazing and roofing fasteners had to be staged inside the homeowner’s garage because the HOA prohibited curb-side material storage, and the dewatering pump ran around the clock to keep the Biscayne Aquifer out of the footing trench before the concrete pour. Every tie-beam strap was inspected and signed off before the underlayment went down, and the punch list closed with the homeowner walking the finished unit alongside our general contractor. New detached ADU construction in Doral typically costs $90,000-$220,000.
Junior ADU & Interior Conversion
Junior ADUs - a self-contained unit within the existing footprint, with a separate entrance but shared utilities - work well in Doral’s townhome and villa product where exterior walls are shared and detached construction is impossible. The challenge here is fire separation: Doral’s building department requires rated assemblies between the JADU and the primary residence, plus independent ventilation per Miami-Dade mechanical code. We map the existing MEP layout in our first site visit and quote the separation work as a line item, not a discovery. Junior ADUs in Doral typically fall on the lower end of the home addition range because the envelope is already built.
Room Additions
Single-story room additions in Doral - master suites, expanded kitchens, or family rooms - must match the existing CBS construction and stucco finish while meeting current HVHZ uplift requirements for the roof tie-down. We source matching stucco texture and paint through our fifty-plus vetted brand relationships, including Toto fixtures and Delta plumbing trim where the addition includes bath or kitchen space. The quote includes a mockup panel for HOA architectural review where required.
Second Story Additions
Second-story additions on Doral CBS homes differ fundamentally from the same project in older Miami-Dade municipalities. Because Doral was incorporated only in 2003 and its housing stock is almost entirely post-1992 CBS construction, a second-story addition here typically starts from a roof and truss package designed to old HVHZ uplift rules - not from the sagging joists and undersized framing a contractor expects when adding up in older Miami-Dade municipalities. The existing walls are 8-inch block with poured cells, the footings are already sized for two stories in many cases, and the engineering focuses on tie-beam continuity and new stair penetration rather than structural rescue. This changes both the schedule and the price: Doral second-story work typically moves faster through framing but requires careful coordination of the roof removal phase to maintain HVHZ envelope integrity during construction. Expect $45,000-$130,000 depending on square footage and interior finish level.
Sunrooms & Enclosed Patios
Enclosed patios and sunrooms in Doral must meet the same HVHZ glazing and wind-load standards as the primary residence, which rules out the lightweight aluminum kits common in inland Florida markets. We spec NOA-approved impact windows and doors, with Schluter waterproofing systems at the slab interface to prevent the moisture intrusion that flat, low-lying sites near the Everglades margin invite. The enclosure is quoted as a conditioned or unconditioned space from the start so the permit path is clear.
ADU Site Prep & Utilities
Site prep for Doral ADUs often includes dewatering for excavation, especially on properties west of NW 87th Avenue where the Biscayne Aquifer rides close to grade. We specify active dewatering in our written scope when soil borings or adjacent construction history indicates it’s needed, and we include the pump rental and monitoring as a line item. Utility trenching for sewer, water, and electrical to a detached unit must avoid existing HOA irrigation, drainage, and lighting systems mapped in our pre-construction survey.
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 Doral
We source across fifty-plus vetted brands so our written quotes carry honest numbers rather than inflated allowances. For Doral home additions and ADUs, we regularly spec Toto toilets and lavatories, Delta shower and kitchen faucets, and Schluter waterproofing membranes at wet-area transitions. These are stocked through our Miami-area supply chain with typical lead times of 3-5 business days for standard finishes, or 2-3 weeks for special-order colors. We don’t quote “allowances” that shift risk to the customer; we name the brand, the model, and the installed price in the written scope. If you prefer American Standard fixtures or a different Schluter profile, we adjust the line item before you sign, not after.
Common Home Additions & ADU Problems We See in Doral Homes
- NOA non-compliance on specified materials. A competitor quotes generic FBC-approved roofing underlayment or impact windows to hit a lower number, then the Doral inspector rejects it and the homeowner pays for full material replacement mid-project. We spec Miami-Dade NOA products from the first revision.
- Flood-zone elevation misses on garage conversions and rear additions. The existing slab sits below BFE in FEMA AE zones, which isn’t obvious until the rough-in inspection fails. We survey grade and reference the FEMA map in our first visit, then include elevation work in the base quote.
- Underestimated tight-lot logistics. HOA storage bans, shared-wall party-wall notice to neighbors, and Doral’s work-hour/noise ordinance routinely add staging and scheduling cost that never appeared in the original scope of work. We walk the site, read the HOA docs, and quote the logistics explicitly.
- Dewatering surprises during excavation. The Biscayne Aquifer sits close to surface grade across much of Doral. A footing trench fills overnight without active pumping. We specify dewatering equipment and monitoring when our pre-construction survey indicates it’s needed, so the concrete pour happens on schedule.
Pricing for Home Additions & ADU in Doral, FL
We put the number in writing before anyone picks up a tool. For Home Additions & ADU in Doral, our typical ranges are:
| Service | Typical Range in Doral |
|---|---|
| Home Addition (room or second story) | $45,000 - $130,000 |
| ADU Construction (detached, new) | $90,000 - $220,000 |
| Garage Conversion ADU | $30,000 - $80,000 |
What moves a project within these ranges? Finish level is the largest variable: porcelain tile and Toto fixtures cost more than vinyl and builder-grade fiberglass. Site constraints matter too - a tight lot with HOA staging restrictions adds labor hours for material handling. Flood-zone elevation work adds $8,000-$15,000 to garage conversions when the slab must be raised. And dewatering for excavation on properties near the Everglades margin runs $2,500-$5,000 for the rental and monitoring period. Every factor is listed as a line item in our written quote, with a signed change order required before any adjustment proceeds. That’s the discipline that has kept our projects within a few percent of the agreed price across 4,000-plus jobs. Call (786) 321-4970 for your free estimate.
We Also Serve Cities Near Doral
Our crews work throughout Miami-Dade County, with regular projects in Miami, Brownsville, Miami Beach, and Miami Springs. Each city’s building department, housing stock, and flood-zone profile differs, and we adjust our quotes accordingly - the same detailed site survey and written scope we bring to Doral. If you’re comparing contractors across these markets, bring us any written estimate for a free line-by-line review.
Serving Doral, FL - Our Local Coverage Area
We’re based in the Doral 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 Doral
Doral’s post-2003 municipal building department operates under Miami-Dade County’s High Velocity Hurricane Zone jurisdiction, which maintains its own Notice of Acceptance product approval system separate from and stricter than the standard Florida Building Code. The NOA process tests roofing fasteners, impact glazing, underlayment, and structural connectors under sustained wind and missile-impact conditions specific to South Florida’s storm exposure. A product with FBC approval but no Miami-Dade NOA will fail Doral inspection, forcing removal and replacement at full cost. We verify NOA status on every specified material before the permit application is filed. Call (786) 321-4970 if you want us to review a competitor’s material list for compliance.
Most Doral lots in master-planned communities have side setbacks of 8-12 feet, which allows a detached ADU of 400-600 square feet with careful placement, but not the 800-plus-square-foot units common on larger suburban lots. The limiting factor is often the HOA design guidelines rather than the zoning code - many gated enclaves restrict accessory structures to specific zones of the rear yard and prohibit two-story ADUs entirely. We measure the buildable envelope and review the HOA docs during our first site visit, then quote only what the site can legally accommodate. Call (786) 321-4970 to schedule that survey.
Yes. FEMA AE zones in Doral require the finished floor of any habitable space to meet or exceed Base Flood Elevation, and most existing garage slabs sit 12-24 inches below BFE. The conversion requires either raising the slab on a new stem wall or constructing an elevated floor system within the existing envelope. We identify the BFE for your property in our first visit and include the elevation method, structural connection, and revised MEP routing as line items in the written quote. Skipping this step means a failed rough-in inspection and a reset draw schedule. Call (786) 321-4970 for a quote that includes the elevation work upfront.
Doral’s flat, low-lying terrain near the Everglades margin puts the Biscayne Aquifer close to surface grade across much of the city, especially west of NW 87th Avenue. Excavation for footings, utility trenches, or elevator pits routinely requires active dewatering pumps even during the dry season, whereas eastern Miami-Dade sites on higher coastal ridges often drain passively. We specify dewatering equipment, discharge permitting, and 24-hour monitoring when our pre-construction survey indicates it’s needed, and we include the cost as a line item rather than a contingency. Call (786) 321-4970 to discuss your site’s drainage conditions.
The starting condition is fundamentally different. Doral’s post-1992 CBS construction typically presents 8-inch block walls with poured cells, engineered truss roofs, and footings already sized for two-story loads in many master-planned designs. An older Miami home - pre-1980s frame or early CBS - often requires sistered joists, reinforced footings, or full structural remediation before the new floor can load the existing walls. The Doral project moves faster through framing and structural inspection but requires precise coordination of the roof removal to maintain HVHZ envelope protection during construction. We engineer for the specific house we find, and we quote the structural work - or lack of it - explicitly. Call (786) 321-4970 for a written scope based on your home’s actual condition.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Doral since 2007.