Fast, Reliable Garage Conversion ADU Across North Miami Beach
Garage conversion ADUs in North Miami Beach typically run $185,000-$320,000 all-in, drawings through final inspection, with flood elevation work and HVHZ glazing accounting for $25,000-$45,000 of that total. If the existing slab sits below FEMA AE Base Flood Elevation, which is common in Eastern Shores, Skylake, and along NE 163rd Street, the permit path changes before you ever open a wall. We’re a design-build studio that writes one price for the drawings, the permit set, and the construction, so the number we give you is the number you hold. Call (971) 497-2402 and we’ll walk the site, check the slab height, and tell you exactly where your project lands.
Why Ellery ADU Studio Is North Miami Beach’s Preferred Garage Conversion ADU Company
We started as a design-build studio in 2015, the year California overhauled its ADU permitting rules, and we have carried that same permit-first discipline into North Miami Beach. Led by Nadia Ellery, our team has designed, permitted, and built more than 900 ADUs since 2015, and every one of them had a written price before work started. That is not a slogan. It is Clause 1 of our Haven Standard, the written contract terms we hand every client.
North Miami Beach projects carry a specific set of triggers: flood elevation checks, HVHZ impact glazing, panel upgrades on 1950s and 1960s CBS homes. We know which triggers will hit your project because we have already pulled permits in this city’s building department and sat through the plan reviews. Homeowners here are doing real research before they call. They want a documented permit set and a written warranty, not a sales pitch. That is what we hand them.
We also keep a Garage Conversion ADU team that stays on one project from first site visit to final inspection, so the person who measured your slab is the person signing off on the elevation certificate. Dispatch and scheduling run from our Miami office, but the crews serving North Miami Beach are local to the area and know the inspection schedule at the city’s building department.
Our Garage Conversion ADU Services in North Miami Beach
We handle five project types under one contract in North Miami Beach, and two of them dominate the work here: attached garage conversions and garage partition with bathroom adds. The city’s housing stock, mostly 1950s to 1970s concrete block homes on 7,500 to 10,000 square foot lots, shapes which path makes sense. Here is what each looks like in this market.
Attached Garage Conversion
An attached garage on a North Miami Beach CBS home usually shares the house roof line and at least one wall. That saves money on foundation work but creates a new problem: the existing roof diaphragm has to be tied into the new habitable space per Miami-Dade HVHZ, which means structural tie-downs and straps, not just drywall and flooring. We handle the engineering in-house and write the structural scope into the original contract, before the plans go to the city. When the inspector opens the walls, our crew has already documented what is inside with a photo record.
Detached Garage Conversion
Detached garages in North Miami Beach, especially on the larger lots in the central and eastern neighborhoods, give you more separation and a cleaner rental story. But they are also more likely to sit below flood elevation, because older detached slabs were poured as cheap storage, not living space. If your slab is below BFE, you decide between raising the slab with stem walls or scrapping the conversion. We measure and tell you before you spend a dollar on plans.
Carport Conversion
Carports are the wildcard. A carport enclosure in North Miami Beach usually needs new foundation work, full wall framing to HVHZ wind load, and impact-rated windows on every new opening. The cost often lands close to a new detached ADU, which surprises homeowners who assumed a carport conversion would be cheaper. We will tell you that in the first conversation, because pretending otherwise does not help you or us.
Garage Partition & Bathroom Add
For multigenerational families in North Miami Beach, this is the most common request we see. The garage becomes a private suite with its own bath and entrance, while the rest of the house stays untouched. It is popular in the Haitian-American and Caribbean communities where elder parents or adult children live on the same lot. The catch is plumbing: adding a bathroom to a 1960s garage usually means cutting into the slab to run new waste lines, and that triggers your flood elevation check. We sequence the work so plumbing rough-in happens after the elevation question is answered, not before.
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.
Trusted Brands We Service in North Miami Beach
We specify and coordinate prefab and modular systems from Cover, Dvele, and Mighty Buildings within the same single contract, which matters in North Miami Beach because HVHZ code requires engineering on every component, not just the structure. We stock and coordinate impact-rated glazing packages locally, so when your permit triggers HVHZ glass on every opening, we are not waiting on a three-week backorder from out of state. The same goes for panel upgrades and stem-wall materials. Our North Miami Beach clients get a line-by-line material schedule in the contract, and the brands we specify are listed by name, not hidden behind markup.
Common Garage Conversion ADU Problems We See in North Miami Beach Homes
- The 100-amp panel was never upgraded. Homes built in North Miami Beach between 1950 and 1975 frequently still run on the original 100-amp service. A second dwelling unit draws enough load to fail the electrical review once the city sees the permit application, and the upgrade means a new panel, meter, and possibly a service lateral from the street. If this is not in your contract, the price moves after the walls are open.
- The garage slab was poured below FEMA AE Base Flood Elevation. This is the single most common project-killer in North Miami Beach. A 1960s slab-on-grade garage in a flood zone often sits a foot or more below BFE. The city will not issue a change-of-occupancy permit for habitable space at that height. Your options are a stem-wall slab raise, fill, or abandoning the conversion. We measure the slab in the first site visit, before any plans are drawn.
- HVHZ impact glazing was not priced into the quote. Miami-Dade’s High Velocity Hurricane Zone requires impact-rated windows and doors on every ADU opening. On a garage conversion with a new bath, a bedroom, and a kitchenette, that can mean 8 to 12 openings. A lowball garage conversion quote that skips this line item blows up the moment the permit review catches it. Our written price includes it from day one.
- The septic-to-sewer conversion stalls the permit. Some North Miami Beach lots still connect to septic systems, especially in older pockets of the city. A second dwelling unit changes your sewage demand, and the city or the utility will require a sewer connection before they approve the ADU. That is a five-figure line item if it is not anticipated. We check your sewer status during the site walk.
Pricing for Garage Conversion ADU in North Miami Beach, FL
Here are the honest ranges for North Miami Beach, written out so you can plan before you call. An attached garage conversion with a bathroom add runs $185,000-$260,000. A detached garage conversion on a slab that needs a stem-wall raise runs $240,000-$320,000. A carport enclosure runs $210,000-$290,000, because of the new foundation and full HVHZ wall framing. A garage partition with bathroom add runs $140,000-$210,000. Flood elevation work, if required, adds $25,000-$45,000. HVHZ impact glazing adds $12,000-$28,000 depending on the number and size of openings. These are written prices, not verbal estimates. You receive the number on paper before any work begins, per Haven Standard Clause 1. Call (971) 497-2402 and we will walk your property, measure your slab, and give you a written price.
We Also Serve Cities Near North Miami Beach
Our crews serve Hollywood, Miami Gardens, Hialeah, and Miami, and we understand how the code triggers differ in each. If you are just outside the North Miami Beach line, we can still pull your permit, check your flood zone, and write the same single-contract price. For a full picture of what we do across the region, visit our Garage Conversion ADU in North Miami Beach page.
Serving North Miami Beach, FL - Our Local Coverage Area
We’re based in the North Miami Beach 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 - Garage Conversion ADU in North Miami Beach
North Miami Beach sits inside Miami-Dade County’s High Velocity Hurricane Zone, and Aventura does too, but the trigger comes down to whether the project is a remodel of existing habitable space or a change of occupancy from garage to dwelling. A change-of-occupancy permit for an ADU requires every new opening, every replaced window, and every door to carry an HVHZ impact-rating label. A simple interior remodel of an existing bedroom does not always trigger the same scope. When a garage becomes living space, the city treats it as new habitable construction, and the glazing line item lands in your permit review regardless of what your original quote said. We price HVHZ glass into the written contract on day one. Call (971) 497-2402 for a written price that already includes it.
Yes, in most cases, but you will have to raise the finished floor above Base Flood Elevation. On a 1960s slab-on-grade garage in North Miami Beach, that means either pouring a raised slab with stem walls or, if the structure allows it, adding fill and a new slab on top. The city will not issue a change-of-occupancy permit for habitable space below BFE. We have handled this on multiple Eastern Shores homes, and the cost typically lands between $25,000 and $45,000 depending on how high the raise needs to go and whether the existing slab can be reused as a base. We measure the slab height during the first site visit and tell you before any plans are drawn. Call (971) 497-2402 to schedule that walk.
The most common one is the original 100-amp panel still serving the entire house. Once the city sees a second dwelling unit on the permit application, the electrical review flags the panel as undersized, and the permit stalls until the service gets upgraded to 200 amps. Sometimes the issue is aluminum branch wiring from the 1960s, which has to be remediated before the walls close. Sometimes it is a subpanel buried in a wall that was never permitted. On a 1962 CBS home in the Eastern Shores area, our crew opened the garage walls and found the original 100-amp panel serving both house and future ADU, plus a slab 14 inches below the FEMA AE Base Flood Elevation. We wrote the panel upgrade and a stem-wall slab raise into a change-order allowance, then installed impact-rated glazing on every new opening per Miami-Dade HVHZ before the final inspection passed. That is the difference between a real contract and a quote that moves after the walls are open. Call (971) 497-2402 and we will inspect before you commit.
Yes. A second dwelling unit increases your sewage demand, and Miami-Dade Water and Sewer will not approve the ADU while the lot is still on septic. The utility will require a connection to the municipal sewer line, which means a new lateral from the street, possible road cutting, and a site restoration. On a North Miami Beach lot in an older pocket of the city, that line item can run $15,000 to $35,000 depending on distance from the main and whether the city requires a new cleanout at the property line. If you do not know whether your lot is on septic or sewer, we can check that in the first site visit. Call (971) 497-2402 and we will verify it before you spend money on plans.
Flood elevation and HVHZ glazing drive the difference. Hialeah sits farther inland and much of it is outside FEMA AE flood zones, so a garage slab there often meets the elevation requirement without added stem walls or fill. North Miami Beach’s coastal and near-coastal neighborhoods fall inside FEMA AE, and the older garages on those lots were poured low. Add impact-rated windows on every ADU opening, which the HVHZ code mandates, and the cost curve shifts by $25,000 to $45,000 before you factor in anything else. It is not markup. It is the physics and the code of building living space in this city. We write the same price in Hialeah and North Miami Beach; the scope is what changes. Call (971) 497-2402 for a written breakdown specific to your lot.
Call (971) 497-2402 to schedule your free site walk in North Miami Beach. We will measure the slab, check the flood zone, review the panel, and hand you a written price for the drawings, the permit set, and the construction. One contract, one price, no surprises.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving North Miami Beach with design-build ADU services since 2015.