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 Aventura
Home additions and ADU construction in Aventura typically run between $45,000 and $130,000 for a standard addition, with detached ADUs ranging from $90,000 to $220,000 depending on size, finishes, and site access. Most projects in Aventura take four to nine months from permit submittal to final inspection, and the biggest variables are condo board approvals, structural reviews tied to SB 4-D, and Miami-Dade’s stricter NOA product requirements. We know Aventura’s buildings because we work in them every week. Call (877) 610-1318 for a free estimate and we’ll walk your specific building before we put a single number on paper.
Why Barrett & Sons Construction Is Aventura’s Preferred Home Additions & ADU Company
We’re Barrett & Sons Construction, and we’ve been owner-operated since 1998. Tom Barrett’s name, address, and license number are published and verifiable. Ask anyone on your street, or look up the license number yourself. What Aventura homeowners find when they do is a contractor who shows up with his sons running the crews, not a franchise dispatching strangers.
Every job we do in Aventura starts with scope in writing, allowances in writing, and change orders in writing. That matters here more than most places, because Aventura’s condo buildings stack layers of approval on top of city permitting. The permit inspector works for you, not for me. That’s why I like him. When we frame a garage conversion near Yacht Club Way or add a second story off Country Club Drive, the HOA knows what’s coming, the engineer has signed off, and the price doesn’t move unless there’s a written change order first.
Our Home Additions & ADU team has handled countless projects in 33180, from interior conversions in older mid-rises to new detached ADUs on the rare single-family lot near the 1800 block of Northeast 28th Avenue. We answer our own phone, every time, and we back every completed job with our written 90-Day Done Right Promise. One call brings Tom back.
Our Home Additions & ADU Services in Aventura
New Detached ADU
A new detached ADU in Aventura runs $90,000 to $220,000, and on the city’s limited single-family parcels it’s usually the fastest path to rental income or a private suite for family. Site access drives the quote. If we can’t get a concrete pump into the backyard, the foundation plan changes. We stage materials on one reserved bay, coordinate with the HOA where there is one, and keep the job site tight and clean so neighbors stay on our side.
Second Story Additions
Second-story additions in Aventura start in the $45,000 to $130,000 range and carry a structural obligation most cities don’t have. SB 4-D milestone inspections mean the existing building’s concrete and post-tension cables may already be under engineering review. We verify that status before we price anything, because a second-story addition on top of flagged common-area concrete can trigger a conflict order that stalls your rough-in.
Garage Conversion ADU
Garage conversions in Aventura run $30,000 to $80,000 and are the most popular ADU route in the city’s condo and townhome stock. The catch here is product approval. Miami-Dade’s HVHZ designation means every window and door must carry a Notice of Acceptance. Specify a non-NOA unit and the permit gets bounced. We quote only NOA products from brands we can verify, which keeps your order from sitting in a reorder queue for six weeks.
Junior ADU & Interior Conversion
Junior ADUs and interior conversions are the quiet path in Aventura, often $45,000 to $90,000 when carved out of existing square footage in a mid-rise unit. The workflow is board-heavy. Work-hour restrictions, shared-wall party notices, and HOA submittal calendars can add four to six weeks before a hammer swings. We handle the board packet as part of the job, not as a surprise line item.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
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.
Trusted Brands We Service in Aventura
We don’t show up with mystery materials off a van. For hardscape and site work around Aventura additions, we carry Techo-Bloc and Cambridge Pavers, and we specify Quikrete products for concrete restoration where the spec allows. When a brand has a local supplier, we can pull load-ready material faster, which keeps your Aventura project moving when the crane window is tight. You can look up every brand we install.
Common Home Additions & ADU Problems We See in Aventura Homes
- Condo board approvals that eat the schedule. Aventura’s buildings are overwhelmingly condo towers and mid-rises. Work-hour limits, elevator reservations, and party-wall notices routinely add four to six weeks before framing starts. We front-load the board packet so the approval clock is running while permits are still being drawn.
- Specifying non-NOA windows or doors. Aventura sits inside Miami-Dade’s High-Velocity Hurricane Zone. If a sunroom or garage conversion specifies a product that isn’t NOA-approved, the permit is rejected and the material order stalls. We verify every product against the county’s approval list before a purchase order goes out.
- Starting a second-story addition without checking milestone inspection status. Most Aventura buildings are over 30 years old, which means they’re already inside SB 4-D’s inspection window. If the building’s common-area concrete has been flagged, your unit-level structural work may conflict with building-wide remediation drawings. We reconcile those scopes before rough-in begins.
- Parking and material staging on tight lots. Aventura is dense. There’s no laydown yard on a condo site off Yacht Club Way. Staging on one reserved bay, scheduling crane picks, and coordinating with the HOA’s loading dock all affect the timeline and the quote. We price access realistically from the first walkthrough.
Pricing for Home Additions & ADU in Aventura, FL
Here’s what we’re seeing in Aventura right now. A standard home addition runs $45,000 to $130,000. Detached ADUs run $90,000 to $220,000. Garage conversions land between $30,000 and $80,000. If we’re also touching a kitchen or bath as part of the addition, those trades add $14,000 to $45,000 or $9,000 to $28,000 respectively. These are all-in ranges for typical Aventura buildings, not teaser prices.
| Project Type | Typical Aventura Cost Range |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
| Kitchen Remodel | $14,000-$45,000 |
| Bathroom Remodel | $9,000-$28,000 |
What moves the number in Aventura is access, board approval status, and whether your building’s milestone inspection has flagged anything structural. We give free estimates and written line-item quotes. Call (877) 610-1318 and you’ll get a real conversation with someone who has walked your building type before.
We Also Serve Cities Near Aventura
If you’re just outside Aventura in North Miami Beach, Ojus, Sunny Isles Beach, or Hallandale Beach, we cover those areas too. Much of what we’ve described here, including SB 4-D issues and NOA product requirements, applies across the coastal strip. Learn more about our Home Additions & ADU in Aventura coverage and how we handle neighboring city permits.
Serving Aventura, FL - Our Local Coverage Area
We’re based in the Aventura 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 Aventura
Yes. You need Miami-Dade building permits plus written approval from your condo board or HOA before any demo or framing starts. In Aventura, the board approval is often the longer timeline. Work-hour restrictions, elevator reservations, and party-wall notices can take four to six weeks. We prepare the board packet while the city permit is being drawn, so both approvals run in parallel. Call (877) 610-1318 if you want us to review your building’s specific submittal calendar.
SB 4-D requires structural milestone inspections for buildings 30 years or older within three miles of the coast, which captures most Aventura towers and mid-rises. If your building’s inspection has flagged common-area concrete, post-tension cables, or a balcony condition, your second-story addition’s structural drawings must be reconciled with the building-wide remediation scope. We verify your building’s milestone inspection status before we price the job, and we bring in a structural engineer to resolve any conflict orders. Call (877) 610-1318 for a free estimate and we’ll check your building’s current inspection filing.
Most Aventura condo buildings restrict construction to weekday business hours, often 9 a.m. to 5 p.m., with no hammering on weekends or some holidays. Some mid-rises require elevator protection and negative-air containment for common corridors. We pull the specific rules from your HOA’s governing documents during the board approval phase and build the schedule around them, not against them. Call (877) 610-1318 and we’ll review your building’s restrictions in the first conversation.
Because Aventura is a dense, built-out city where there’s no laydown yard on a condo site. Materials get staged on one reserved parking bay, crane picks are scheduled days in advance, and the HOA’s loading dock may be shared. Access determines whether we hand-carry framing lumber or pay for a crane, and that rewrites the labor number. We price access after a real walkthrough, never from a satellite image. Call (877) 610-1318 for an exact quote with your building’s access conditions factored in.
Probably not, especially in an older building. If the patio slab or balcony frame is part of the building’s common-area structure, your conversion ties into the building’s SB 4-D inspection scope. Even when the patio is private, any new enclosure must use NOA-approved windows and doors, and the permit department will want stamped drawings. We check the building’s inspection status and the patio’s structural classification before recommending a path. Call (877) 610-1318 for a free second opinion on any written estimate you’ve already received.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Aventura and South Florida since 1998.