Fast, Reliable New Detached ADU Across Hialeah
A new detached ADU in Hialeah typically runs $210,000 to $340,000 all-in, from drawings through final inspection, depending on whether you build custom on-site or specify a prefab system like Abodu or Cover. We do the whole thing under one contract at one written price, which means the architectural drawings, the Miami-Dade permit set, and the construction are our responsibility, not three separate vendors pointing fingers. If you’re on a narrow lot near East 4th Avenue or out by West 68th Street and wondering whether your yard can even fit a detached unit, call (971) 497-2402 and we’ll tell you straight, with numbers, before you spend a dime.
Why Ellery ADU Studio Is Hialeah’s Preferred New Detached ADU Company
Hialeah’s housing stock is different from the rest of South Florida. The city is a dense grid of CBS (concrete block) homes built between the early 1950s and late 1970s, most on lots 50 feet wide or less. That changes how a detached ADU gets designed, permitted, and built. You cannot copy a plan from a Kendall subdivision and drop it onto a 5,000-square-foot lot off Palm Avenue. We know that because we’ve done this work here, repeatedly, and we’ve learned what the city’s reviewers flag and what they pass without comment.
We’re a New Detached ADU design-build studio, not a contractor who hands you drawings from someone else and then blames the architect when the inspector finds a problem. Nadia Ellery founded this practice in 2015, and every project we take on starts with a written price under Haven Standard Clause 1. No call-for-a-quote games. No “we’ll see once we open the walls.” The number is on paper before you sign anything.
Hialeah customers get the same documented process: a photo record of every site visit, a permit set that a third-party reviewer could audit, and a 365-Day Done Right Promise in writing. If the finished ADU doesn’t match the permitted drawings, we fix it. That clause is in the contract, not a marketing line on a van.
Our New Detached ADU Services in Hialeah
Custom Built ADU
A custom detached ADU lets you use every inch of a tight Hialeah lot. We design around your existing slab, your side setbacks, and the parking replacement requirement the city enforces, then build on-site. On a 50-foot lot near East 4th Avenue, we built a one-bedroom detached ADU for a family that had been illegally renting a converted carport. Our crew kept the site clean with flaggers and a single-truck staging plan, installed impact-rated windows to meet Miami-Dade’s 175+ mph wind-load code, and poured a replacement parking pad only after percolation tests confirmed the high water table wouldn’t undermine the slab.
Prefab ADU Installation
Prefab works well in Hialeah when your lot access is constrained. We specify and coordinate systems from Abodu and Cover within the same single contract that covers your foundation, utility trenching, and Dade County permit compliance. Prefab doesn’t dodge the wind-load rules. Impact-rated openings are still mandatory, and we price them from day one, not as a surprise line item after you’ve emotionally committed to a floor plan.
Modular ADU
Modular construction gives you factory-built precision with more layout flexibility than a fully prefab unit. Hialeah’s dense blocks mean crane access and staging need planning before the modules arrive. We coordinate that, along with off-street parking replacement and slab elevation. A two-bedroom modular ADU in Hialeah typically runs $290,000 to $360,000 all-in, impact-rated windows and permit fees included.
Studio ADU
A studio detached ADU is the most common request we get from Hialeah homeowners who want a legal rental or space for an aging parent. Expect 400 to 600 square feet, a full bath and kitchenette, and a build range of $195,000 to $250,000 depending on foundation work and utility runs. On lots where the sewer lateral runs under the only buildable yard space, that trenching cost gets priced upfront, not discovered mid-dig.
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 Hialeah
We specify and coordinate Abodu, Cover, Dvele, and Mighty Buildings systems for Hialeah projects, and we handle the foundation, utility, and wind-load compliance work that factory warranties do not cover. All of it stays inside the same written price and the same contract. We keep the process plain: one team, one scope, one set of drawings, one number.
Common New Detached ADU Problems We See in Hialeah Homes
- The parking replacement rule catches people off guard. Hialeah requires that any off-street parking lost to a new detached ADU be replaced on the same parcel. On a narrow, fully-paved lot, that often means engineering a new concrete pad in what little yard remains, and the cost goes into our quote from day one, not after demolition starts.
- Impact-rated openings get ignored in the first bid. Miami-Dade’s post-Hurricane Andrew protocol requires impact-resistant windows and doors, rated for 175+ mph wind loads. We quote them from the start. A competitor who doesn’t will look cheaper on paper and then hand you a change order for $18,000 when the permit reviewer rejects the window schedule.
- Slab elevation gets skipped. Hialeah’s water table sits high, and seasonal flooding is real. A ground-level ADU poured without proper elevation will show moisture intrusion within two wet seasons. We run percolation tests before we design the foundation, not after the inspector flags it.
- A contractor blocks a neighbor’s driveway during staging. Dense streets don’t forgive bad logistics. A neighbor complaint to code enforcement can trigger a stop-work order. Our crews stage on-site where possible and coordinate flagging when the street is genuinely too tight.
Pricing for New Detached ADU in Hialeah, FL
Here are the numbers we’re seeing in Hialeah, not generic Florida averages. A studio detached ADU runs $195,000 to $250,000. A one-bedroom custom unit lands between $230,000 and $310,000. A two-bedroom, whether modular or stick-built, sits at $290,000 to $360,000. Prefab systems from Abodu and Cover add coordination cost but can reduce site time, which matters when your yard doubles as your staging area. Every quote we write includes the Miami-Dade wind-load upgrades, the parking replacement pad, permit fees, and our photo record. You get one written price, and under Haven Standard Clause 5, the scope is locked at signing. No door-side upsells. Call (971) 497-2402 to schedule your free estimate.
We Also Serve Cities Near Hialeah
Our crews serve Hialeah and the surrounding South Florida cities: Miami Gardens, Miami, North Miami Beach, and Miami Beach. Dispatch and scheduling are coordinated from our Miami (South FL) office, with local crews working Hialeah sites daily.
Serving Hialeah, FL - Our Local Coverage Area
We’re based in the Hialeah 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 - New Detached ADU in Hialeah
Yes, but the unpermitted garage conversion must be legalized first, and Hialeah’s parking replacement rule applies to the total off-street parking lost across both structures. That means your new detached ADU may require replacing two parking spaces, not one. We map the full compliance picture before you spend on drawings. Call (971) 497-2402 for an exact scope, and we’ll walk the existing conversion with you.
Yes. Every new detached ADU in Hialeah must meet Miami-Dade’s post-Hurricane Andrew building protocol, which means impact-rated windows and doors rated for 175+ mph wind loads. No inland Florida county requires this, and it adds $14,000 to $22,000 to a typical ADU. We price it in the initial written estimate, not as a change order.
Hialeah enforces standard Miami-Dade construction hours, generally 7:00 a.m. to 6:00 p.m. on weekdays, with weekend work restricted and often requiring notice to neighbors. On dense blocks, noise complaints are the fastest way to a code enforcement visit. Our crews follow the posted hours and keep heavy equipment to a single staging location per site. We’ll also handle any required neighbor notifications before demo or crane work begins.
Hialeah’s water table sits close to the surface, which means ground-level ADUs need proper slab elevation and moisture barriers to pass inspection and stay dry through the wet season. We run percolation tests before foundation design. A home without that testing is gambling on an inspector catch and a mold problem within two years. Our quote includes the testing, the elevation, and the documentation.
Some Hialeah neighborhoods fall under overlay districts with additional setback or design review requirements. Whether your property is affected depends on its specific location, and we verify that before you commit to a design. We pull the planning documents, check the overlays, and tell you what applies to your address. Call (971) 497-2402 if you have a written estimate in hand; a second-opinion review is free.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving Hialeah since 2015.