Fast, Reliable New Detached ADU Across Boynton Beach
A new detached ADU in Boynton Beach typically runs $180,000 to $340,000 all-in, from permit set through final inspection, depending on whether you choose prefab, modular, or custom stick-built. We’re Ellery ADU Studio, and we handle the entire project under one contract at one written price, so there’s no gap between the designer who drew the plans and the crew who built the walls. If you’re weighing a detached unit on a Boynton Beach lot, call (971) 497-2402 and we’ll walk you through what’s realistic for your parcel before you spend a dollar.
We know Boynton Beach lots: the 7,500-square-foot parcels west of I-95, the older CBS homes in the Heart of Boynton, and the HOA-governed communities where a state law says yes but the deed restrictions say no. That local reality changes the job before the first stake goes in the ground. Our team has built, permitted, and delivered New Detached ADU projects on tight sites across Palm Beach County, and we approach every Boynton Beach project with the assumption that the lot is smaller than it looks and the paperwork is thicker than the zoning map suggests.
Why Ellery ADU Studio Is Boynton Beach’s Preferred New Detached ADU Company
We’re a design-build studio, which means the drawings, the permit set, and the construction live in a single contract. That matters in Boynton Beach more than most places, because the city’s permit reviewers at the Building Department expect a complete, code-compliant plan set the first time. When the person who designed the foundation detail is the same person who pours the concrete, nothing gets lost between plan and slab. Nadia Ellery runs the studio, and she signs the same written scope you sign. No designer-versus-builder finger-pointing, no door-side upsells, no scope creep after the contract is signed.
We’ve designed, permitted, and built 900+ ADUs since 2015, and every one of them started with a written price before any work began. That’s Haven Standard, Clause 1. It’s not a marketing line; it’s the governing document on every project we take. We also include a documented photo record on every site visit, so you see what the crew saw, not a summary of how it went. And if the finished ADU doesn’t match the permitted drawings, our 365-Day Done Right Promise says we make it right, in writing, before the project ever starts.
This city has a specific permitting rhythm: coastal flood zones change foundation requirements in the space of a mile, HOA boards add a review layer no state statute can preempt, and older homes often carry 100A electrical panels that can’t support a second dwelling. Our crews know all three problems well. We’re not a franchise; we’re independently owned and operated, and a live person answers the phone at (971) 497-2402 around the clock, not a voicemail queue.
Our New Detached ADU Services in Boynton Beach
Here’s what we build most often on Boynton Beach lots, and what each option looks like on the ground here specifically.
Custom Built ADU
A custom detached ADU in Boynton Beach runs $220,000 to $340,000 depending on finish level, site access, and whether flood elevation requirements add a stem wall or elevated slab. We design to the actual lot: a 7,800-square-foot parcel in the Heart of Boynton gets a different footprint than a 10,000-square-foot lot in Quantum Lakes. The permit set is the core product here, and the construction follows it exactly, documented at every inspection.
Prefab ADU Installation
Prefab units from brands like Abodu, Boxabl, and Dvele run $180,000 to $260,000 in Boynton Beach, including site prep, utilities, and crane delivery. Prefab works best on Boynton Beach lots where access is straightforward: no overhead power lines across the side yard, no 90-degree turn that requires swinging the crane boom over a neighbor’s roofline. We coordinate the manufacturer, the crane operator, and the city inspections under the same single contract.
Modular ADU
Modular ADUs land in Boynton Beach between $200,000 and $290,000. The modules arrive largely finished, which compresses on-site construction time, a real advantage when your HOA limits construction hours or when you’re building on a lot where the neighbors are close enough to hear every nail gun. We specify and coordinate systems from Cover, Mighty Buildings, and Plant Prefab, and we handle site prep, foundations, and utility connections in the same written price.
1-Bed & 2-Bed ADU
A 1-bed detached ADU in Boynton Beach typically runs $180,000 to $240,000; a 2-bed runs $230,000 to $340,000. The two-bed adds square footage, a second egress, and often a bigger electrical load that pushes a panel upgrade from optional to mandatory. On a 750-square-foot one-bed, you might stay on the existing 100A panel if the main house load is modest. Add a second bedroom, a mini-split, and a laundry circuit, and a 200A upgrade becomes the standard line item.
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 Boynton Beach
We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, and Plant Prefab, along with James Hardie siding where the coastal humidity demands a fiber-cement product that won’t rot or swell. We don’t just hand you a catalog. On a Boynton Beach project, we evaluate the brand against the local conditions: flood zone, wind codes, humidity, and your HOA’s architectural guidelines. Then we write the scope to match the brand that fits, not the brand with the best brochure. If you already have a written estimate from another builder, bring it to us. Our Free Second Opinion will tell you what’s realistic, what’s missing, and what you’re actually signing.
Common New Detached ADU Problems We See in Boynton Beach Homes
- HOA deed restrictions that outrank state law. Florida’s 2023 HB 1239 opened single-family lots to ADUs statewide, but it did not preempt private deed restrictions. In Boynton Beach, where communities like Century Village and dozens of 55+ associations govern a huge share of the housing stock, skipping the HOA review can mean fines, a stop-work order, and a demand to demolish within 30 days. We check the HOA documents before we draw a single wall.
- 100A panels that can’t carry a second dwelling. Homes built in the 1970s through 1990s, the dominant stock across Boynton Beach, often still run on 100A service. A detached ADU with a mini-split, water heater, and kitchen loads will trip breakers and fail final inspection. We budget the 200A upgrade as a standard line item, not a surprise change order.
- Flood elevation requirements east of Federal Highway. Eastern Boynton Beach sits partly in FEMA Special Flood Hazard Areas along the Intracoastal. A slab-on-grade ADU that’s fine a mile inland will be denied at permit review. Stem walls or elevated slabs add cost, and we write that cost into the written price before you sign.
- Old sewer laterals in the Heart of Boynton. Many parcels east of I-95 still connect to the city sewer through aging clay pipes. Palm Beach County won’t issue a certificate of occupancy for a second unit on a lateral that fails inspection. We test it during site prep and budget for replacement if it’s needed, so you’re not finding out at final.
Pricing for New Detached ADU in Boynton Beach, FL
A new detached ADU in Boynton Beach runs $180,000 to $340,000 all-in, drawings through final inspection. Prefab units like a one-bed Abodu or Boxabl typically land at $180,000 to $260,000. Custom builds run $220,000 to $340,000. Modular units split the difference at $200,000 to $290,000. What moves the number: lot access and crane staging, whether you’re in a flood zone that triggers a stem wall, whether the existing electrical panel needs a 200A upgrade, and whether the sewer lateral passes inspection. Every one of those items is written into your price before work starts, under Haven Standard Clause 1. Call (971) 497-2402 for a free written estimate.
Working on a Tight Boynton Beach Lot: What Actually Happens
The editorial spine of this page is the constraint: most Boynton Beach lots are 7,500 to 10,000 square feet, single-story CBS construction, with a house already occupying the buildable interior. A detached ADU has to fit what’s left. That means staging, access, and neighbor relations get solved before the first inspection, not after the first complaint.
We did a 650-square-foot Abodu prefab on a 7,800-square-foot lot in the Heart of Boynton CRA, east of I-95. The original 100A panel couldn’t carry the second unit, so we upsized to 200A and ran a new lateral sewer connection after the county flagged the old clay pipe. The site was so tight we staged materials on the front lawn and scheduled the crane delivery for 7 a.m. under the city’s noise ordinance. The neighbors knew the schedule two weeks in advance. That’s how a constrained site stays clean and how a project keeps its permit timeline.
On any Boynton Beach lot, we handle the specifics: parking and material staging within the property line, party-wall notice when the ADU sits close to a shared boundary, historic or overlay-district review where it applies, and the city’s work-hour and noise rules. Access affects the quote directly. A tight side yard that forces a crane to swing over a neighbor’s roof costs more than an open backyard approach. We write that cost in the written price, not as a surprise line item later. This is what our New Detached ADU in Boynton Beach work looks like on the ground, not on a rendering.
Boynton Beach’s Real ADU Obstacle: The HOA Gap
Florida’s 2023 HB 1239 legally opened single-family lots across the state to accessory dwelling units. But Boynton Beach has an extraordinarily dense concentration of HOA-governed and age-restricted 55+ communities, including large developments like Century Village. That means a far higher share of homeowners here run into private deed-restriction barriers that the state law does not preempt. Contractors and ADU builders in Boynton Beach must routinely navigate the gap between what state zoning law now permits and what a homeowner’s HOA documents actually allow, a conflict that is far less common in neighboring Delray Beach or Lake Worth Beach.
This is not a paperwork nuisance. A contractor who skips HOA review and builds a detached ADU anyway can leave the owner facing fines and a 30-day demolition demand, with no state statute to lean on. We read the deed restrictions before we draw the plans. If your HOA bans detached units outright, we’ll tell you before you’ve spent a dollar, and we’ll talk through what the documents actually say about a garage conversion or an interior conversion instead. Sometimes the answer is no; better to know that at the start than at the stop-work order.
Housing Stock, Climate, and What They Mean for Your ADU
Boynton Beach’s dominant housing stock is 1970s to 1990s concrete block stucco, single-story, slab-on-grade, often with an attached one- or two-car garage. Most lots are just large enough to fit a detached ADU under the new state minimums, but the CBS wall framing and original 100A electrical panels typically require real upgrades to meet current Palm Beach County code. Garage conversion ADUs are often the most feasible option on these parcels, but the slab, the panel, and the sewer lateral all need a hard look before the conversion is viable.
Climate shapes the build too. Eastern Boynton Beach near the Intracoastal sits partly in FEMA Special Flood Hazard Areas, and any ADU there has to meet base flood elevation requirements, which means stem walls or an elevated slab, and a cost that doesn’t apply a mile inland. Year-round heat and humidity also demand continuous mechanical ventilation and moisture-resistant materials in any detached or garage-converted ADU, or you’ll be fighting mold in unconditioned wall cavities within two years. We spec for that from day one, because fixing it later means tearing out drywall in a unit that’s already occupied.
The Heart of Boynton: A Different Kind of ADU Demand
The Heart of Boynton Community Redevelopment Area, the historically Black neighborhood east of I-95 with older CBS homes and a large Haitian-American multigenerational population, has some of the strongest organic ADU demand in the city. But many parcels there still rely on older lateral connections to the city sewer system. That clay pipe has to be inspected, and often upsized, before a second unit gets its certificate of occupancy from Palm Beach County. We saw it on that Abodu prefab lot: the county flagged the old clay line, and the new lateral became a line item we had already anticipated in the written price. That’s the difference between a builder who knows the neighborhood and one who’s just running a county permit checklist.
This page exists because there is no other Boynton Beach-specific guide to building a new detached ADU that accounts for HOA deed-restriction conflicts, Intracoastal flood elevation costs, and old sewer laterals in the Heart of Boynton at the same time. Most pages will tell you the state law changed. This one tells you what the state law did not change, and what that means for your lot.
We Also Serve Cities Near Boynton Beach
Our crews work throughout southern Palm Beach County. If you’re in Delray Beach, Boca Raton, Lake Worth, or West Palm Beach, the same one-contract design-build model applies, and the same written-price guarantee covers your project. Call (971) 497-2402 and we’ll tell you what applies to your specific parcel, whether it’s in Boynton Beach or the next city over.
Serving Boynton Beach, FL - Our Local Coverage Area
We’re based in the Boynton 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 - New Detached ADU in Boynton Beach
No. Florida’s 2023 HB 1239 preempts local zoning restrictions, but it does not override private deed restrictions or HOA covenants. If your Boynton Beach community’s governing documents ban detached ADUs, the HOA can still enforce that ban, fine you, and in some cases demand removal. We read the HOA documents before we draw the plans, so you know exactly where you stand before the first permit fee is paid. Call (971) 497-2402 for a free review of what your community actually allows.
East of Federal Highway, portions of Boynton Beach fall within FEMA Special Flood Hazard Areas along the Intracoastal, and any detached ADU there must meet base flood elevation requirements, typically achieved with stem walls or an elevated slab. The exact elevation is set by your flood zone designation on the current FEMA map, and it can add $15,000 to $40,000 to the foundation line item depending on the site. We write that cost into your written price before you sign. Call (971) 497-2402 for a free estimate.
On a tight Boynton Beach lot, we stage materials within the property line, often on the front lawn or the side yard, and we schedule deliveries, including crane placement for prefab units, in specific windows that respect the city’s noise ordinance. We notify adjacent neighbors in writing at least two weeks before crane day. The staging plan is part of the written scope, so you see exactly how the site will be used before work starts. Call (971) 497-2402 to talk through your lot.
No, a garage conversion is an attached ADU, not a detached one, and it’s a different permit path. But on many 1980s Boynton Beach CBS lots, converting the attached garage is the most feasible option: the slab is already there, the walls are already there, and you avoid the setback and flood-elevation issues that a new detached unit triggers. We’ll evaluate the slab thickness, the panel capacity, and the sewer lateral, then give you a written price for whichever path makes sense on your parcel. Call (971) 497-2402 for a free estimate.
Often, yes. Many parcels in the Heart of Boynton still connect to the city sewer through aging clay pipe laterals, and Palm Beach County won’t issue a certificate of occupancy for a second unit if the lateral fails inspection. We test the lateral during site prep and, if it’s undersized or deteriorated, we replace it as a written line item in the original price, not a surprise. Call (971) 497-2402 and we’ll check what your parcel is likely to require before you commit.
Get Your Written Price Before Any Work Starts
If you’re considering a new detached ADU on a Boynton Beach lot, the next step is simple: call (971) 497-2402 and ask for a free written estimate. You’ll get a real price, in writing, before any work begins, per Haven Standard Clause 1. No “call for a quote,” no vague ranges, no change orders after signing. Just the number, the scope, and the documentation you’ll receive along the way. We’re Ellery ADU Studio, and we build ADUs the way we’d want them built on our own lots.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving Boynton Beach and southern Palm Beach County.