ADU in Delray Beach, FL
ADU design and permitting in Delray Beach almost always runs through the city’s Historic Preservation Board when the property sits inside Del-Ida Park, Nassau Park, or Old School Square, and through FEMA’s AE flood zone rules east of I-95. Most of the housing stock here is 1950s-to-1970s concrete block, which changes how we route electrical, plumbing, and HVAC lines and how we price the work. ADU Design & Permitting is the service homeowners in Delray Beach call us about first, because a permit set that clears historic review and flood elevation requirements on the first submittal is the difference between a 4-month project and a 14-month one. Call (971) 497-2402 for a written price before any work begins.
Why Delray Beach Homes Are Different
Delray Beach’s residential neighborhoods west of Federal Highway are dominated by single-story CBS ranch homes built between the 1950s and 1970s. Concrete block is excellent for hurricanes and termites, but it turns a simple garage conversion into a routing puzzle: every new electrical circuit, drain line, and duct run has to be chased through or around solid masonry, and that labor cost is real. We see it on nearly every job in Lake Ida, Seacrest, and Tropic Isle.
East of I-95 and along the canal system, large portions of the city fall within FEMA AE flood zones. A detached ADU slab in those areas must meet a minimum finished-floor elevation, which often means a raised stem-wall foundation or engineered fill, adding several thousand dollars before the first wall goes up. Palm Beach County’s wind codes also require impact-rated windows and doors on any new ADU structure, a non-negotiable line item that surprises homeowners who priced a similar project in Georgia or Texas.
Then there is the Historic Preservation Board. Any ADU proposed within the Del-Ida Park or Nassau Park historic districts triggers mandatory design review. A garage apartment with vinyl siding or a standing-seam metal roof can be denied outright if it clashes with the contributing primary home’s character. We have watched contractors new to Delray Beach learn this only after their first permit submittal came back rejected. Our permit set accounts for that review before we file.
Our Main Delray Beach Services
Most Delray Beach homeowners come to us with one of two questions: can my existing garage become a rental, or should I build a new detached unit in the backyard? Both paths are viable here, but the economics and the permit path are different enough that they deserve their own pages.
Garage Conversion ADU in Delray Beach
Converting an existing garage is the most common ADU path in Delray Beach, especially on the 1950s-1970s CBS ranch lots west of Federal Highway where the garage is already attached and under the same roofline. The catch here is the concrete block: routing new plumbing and electrical through solid CMU walls costs more than it does on a wood-frame house, and we price that honestly up front. We also check whether your garage slab sits above the FEMA flood elevation before we commit to a design, because a conversion that triggers elevation requirements can change the whole scope. See Garage Conversion ADU in Delray Beach for the full breakdown.
New Detached ADU in Delray Beach
A new detached ADU in Delray Beach gives you a clean slate on a backyard pad, but it carries two city-specific costs that attached conversions do not: flood elevation compliance east of I-95 and impact-rated openings everywhere. On the plus side, a detached unit does not have to work around existing block walls, so the framing and rough-in go faster. For seasonal rental owners targeting the October-through-April snowbird market, a detached ADU also offers better privacy and a stronger nightly rate. Read New Detached ADU in Delray Beach for line-item pricing.
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.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
ADU Design & Permitting in Delray Beach
ADU Design & Permitting in Delray Beach is where projects either get approved cleanly or stall for months. The city’s historic districts require Historic Preservation Board sign-off before any ADU can be built on a contributing property, and the FEMA AE flood zones east of I-95 force finished-floor elevations that most generic plan sets ignore entirely. What we deliver is a permit set drawn specifically for your lot, your flood zone, and your property’s architectural character, with every drawing annotated for the reviewer. That is why we treat the permit set as the core product, not a formality. ADU Design & Permitting is a single contract with a single written price, drawings through final inspection.
Site Assessment
Signs you need it
You know your lot has flood zone, setback, or historic district complications but no one has documented them in writing yet.
What it costs in Delray Beach
Site assessments run $850 to $1,900 depending on lot size and whether a surveyor is needed.
How we do it
We measure the lot, verify the FEMA flood panel, check setback and easement lines against the actual survey, and flag any historic district trigger before a single drawing is produced.
ADU Design & Blueprints
Signs you need it
You have a clear idea of the unit you want but need a permit-ready drawing set that will survive Delray Beach’s review process.
What it costs in Delray Beach
Full design and blueprint sets run $5,500 to $11,000 depending on unit size and whether historic board review applies.
How we do it
We draw the architectural, structural, electrical, plumbing, and mechanical sheets, then run the entire set through a Delray Beach-specific compliance checklist before you ever pay the city filing fee.
Permit Application
Signs you need it
You want to avoid resubmittal fees and the 6-to-10-week delay that comes with a rejected permit package.
What it costs in Delray Beach
Permit application and city coordination runs $1,800 to $4,200 depending on review complexity and number of resubmittals.
How we do it
We file the permit set, track every comment from the city, and respond to each one in writing until the permit is issued clean.
What ADU Design & Permitting Costs in Delray Beach
| Item | Typical range in Delray Beach |
|---|---|
| Site assessment | $850 - $1,900 |
| Design & blueprints | $5,500 - $11,000 |
| Permit application & city coordination | $1,800 - $4,200 |
Does Delray Beach require Historic Preservation Board review for every ADU?
No. Only properties inside the Del-Ida Park, Nassau Park, and Old School Square historic districts trigger mandatory board review. We verify your district status during site assessment so you know before you commit.
How long does ADU permitting take in Delray Beach?
Plan on 3 to 6 months from submittal to issued permit, longer if the Historic Preservation Board is involved. A clean permit set shortens that window meaningfully. Call (971) 497-2402 to get your project started with a written price.
Junior ADU & Interior Conversion in Delray Beach
Junior ADU and interior conversion work in Delray Beach is usually the fastest path to a rentable unit, because you are working inside the existing footprint of a home rather than building new foundation walls. The local wrinkle is the concrete block construction: cutting new door openings or running a kitchenette drain line through a solid CMU interior wall costs more than it does in a wood-frame house. We account for that honestly in every written price. Junior ADU & Interior Conversion is one contract that covers the drawings, the permit set, and the construction, so no one can point a finger at anyone else when something is off.
Interior JADU
Signs you need it
You have an underused bedroom, den, or attached garage bay you want converted into a self-contained unit with its own entrance and kitchenette.
What it costs in Delray Beach
Interior JADUs run $60,000 to $105,000 depending on whether plumbing and electrical can be extended from existing lines or need new runs through block walls.
How we do it
We verify the existing framing and slab conditions, design the unit within the current footprint, file the permit set, and build it under one written price.
Room-to-ADU Conversion
Signs you need it
You want to turn a formal living room, dining room, or adjacent bedroom into a legal rental unit with its own entry, bath, and small kitchen.
What it costs in Delray Beach
Room-to-ADU conversions run $70,000 to $125,000 depending on how far new drain and supply lines must travel through the existing slab.
How we do it
We map the existing plumbing stack and electrical panel, draw the unit to minimize new runs through concrete, and execute the build with a documented photo record on every visit.
What Junior ADU & Interior Conversion Costs in Delray Beach
| Item | Typical range in Delray Beach |
|---|---|
| Interior JADU | $60,000 - $105,000 |
| Room-to-ADU conversion | $70,000 - $125,000 |
| Attached addition ADU | $95,000 - $175,000 |
Can I rent out an interior JADU in Delray Beach short-term?
Yes, if the property is not in a historic district that restricts transient rentals and the unit meets Delray Beach’s registration requirements. We flag rental restrictions during site assessment. Call (971) 497-2402 for an exact quote.
Do I need a separate meter for an interior ADU?
Not always, but Delray Beach and FPL will often require a separate panel or subpanel for a new unit, especially if it has its own HVAC. We handle that in the electrical scope, priced up front.
ADU Site Prep & Utilities in Delray Beach
ADU site prep and utilities in Delray Beach is where the flood zone rules and the concrete block reality hit the budget at the same time. East of I-95, a detached ADU slab often needs to be raised several feet to meet FEMA’s finished-floor elevation, which means engineered fill or a stem-wall foundation rather than a simple slab on grade. And on the older CBS lots west of Federal Highway, the existing electrical panel is usually a 100-amp unit from the 1960s that cannot carry a new dwelling’s load. ADU Site Prep & Utilities covers foundation, grading, panel upgrades, plumbing laterals, and gas line work under one written price, so you are not chasing four different subcontractors.
Foundation & Grading
Signs you need it
Your proposed ADU site sits in an AE flood zone, or the existing yard slopes toward the house and needs regrading before any slab can be poured.
What it costs in Delray Beach
Foundation and grading for a detached ADU run $18,000 to $40,000 depending on flood elevation requirements and soil conditions.
How we do it
We verify the FEMA panel, determine the required finished-floor elevation, and design a foundation that meets Delray Beach and county wind codes without overbuilding.
Electrical Panel Upgrade
Signs you need it
Your home’s main panel is 100 amps or less, or it is an older Federal Pacific or Zinsco panel that Delray Beach inspectors will not pass for a new ADU.
What it costs in Delray Beach
Panel upgrades run $3,000 to $6,500 depending on whether the mast and meter socket must be replaced as well.
How we do it
We size the new panel to the ADU’s actual load calculation, pull the electrical permit, and coordinate the FPL disconnect and reconnect so the work passes on the first inspection.
Plumbing Lateral
Signs you need it
Your existing sewer lateral is cast iron or clay from the 1960s, or the new ADU’s drain line must run under a driveway or walkway to reach the city tap.
What it costs in Delray Beach
Plumbing lateral work runs $4,500 to $12,000 depending on trench depth, distance to the tap, and whether directional boring is required.
How we do it
We camera the existing lateral, mark the actual route, and install the new line so it slopes correctly and passes Delray Beach’s inspection the first time.
What ADU Site Prep & Utilities Costs in Delray Beach
| Item | Typical range in Delray Beach |
|---|---|
| Foundation & grading | $18,000 - $40,000 |
| Electrical panel upgrade | $3,000 - $6,500 |
| Plumbing lateral | $4,500 - $12,000 |
Does every Delray Beach ADU need a panel upgrade?
No. If your current panel has 200-amp service and available breaker slots, we can often feed the ADU from a subpanel. We do a load calculation before recommending any electrical work. Call (971) 497-2402 for an exact scope and price.
What is the FEMA finished-floor elevation requirement in Delray Beach?
It varies by flood panel and the specific AE zone designation on your lot. We pull the actual FEMA panel and determine the required elevation during site assessment, before you commit to a foundation design.
Brands We Service in Delray Beach
We specify and coordinate systems from James Hardie, Abodu, and Cover in Delray Beach, including Hardie siding and trim profiles that clear the city’s historic district design review and Abodu and Cover prefab units that reduce on-site framing time in tight backyard lots. See our brands for the full range.
Pricing for ADU in Delray Beach, FL
| Service | Typical range in Delray Beach |
|---|---|
| Site assessment | $850 - $1,900 |
| ADU design & blueprints | $5,500 - $11,000 |
| Permit application & city coordination | $1,800 - $4,200 |
| Interior JADU | $60,000 - $105,000 |
| Room-to-ADU conversion | $70,000 - $125,000 |
| Attached addition ADU | $95,000 - $175,000 |
| Foundation & grading | $18,000 - $40,000 |
| Electrical panel upgrade | $3,000 - $6,500 |
| Plumbing lateral | $4,500 - $12,000 |
Prices in Delray Beach push higher when the property is east of I-95 in an AE flood zone, when the home is inside a historic district that triggers design review, or when the existing slab and lateral lines are original 1960s construction. Every project we quote carries a written price before any work begins, per Haven Standard Clause 1, so the number you see on paper is the number you pay.
Neighborhoods We Serve in Delray Beach
We work across Delray Beach, from the historic enclaves near downtown to the canal-front lots east of I-95 and the CBS ranch subdivisions west of Federal Highway.
- Lake Ida
- Seacrest
- Tropic Isle
- Nassau Park
- Del-Ida Park
Most sites in Delray Beach can be scheduled for a site assessment within five to seven business days of your call.
Service Area - Cities Near Delray Beach
We also serve homeowners in Boynton Beach, FL, Boca Raton, FL, Lake Worth, FL, and Pompano Beach, FL. Each city has its own permit path and flood zone profile, and we draw every permit set to the specific rules of the property’s jurisdiction, not a generic template.
Serving Delray Beach, FL - Our Local Coverage Area
We’re based in the Delray 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 About ADU in Delray Beach
No, you do not need to own the property free and clear. If you have a mortgage, you will likely need the lender’s awareness, and if you have a HOA, its rules may limit rentals or architectural changes. We verify both constraints during site assessment before any design work begins.
Yes, and many Delray Beach homeowners do exactly that, targeting the October-through-April snowbird market near Atlantic Avenue. The unit must meet city registration and fire safety requirements, and historic districts may restrict short-term rental use. We flag rental restrictions up front.
We will review any written estimate in hand as part of our Free Second Opinion, and we will tell you honestly whether the scope is complete or missing line items like flood elevation, impact-rated openings, or historic board review. Call (971) 497-2402 to schedule that review at no charge.
Call Ellery ADU Studio at (971) 497-2402 for a written price on your Delray Beach ADU project. Every estimate is a fixed line-item price before any work starts, with a documented photo record on every visit and the 365-Day Done Right Promise in writing.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Delray Beach Customers Say
"Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
- Benedict H."Handled the whole planning process. We went to one hearing and that was it."
- Rowena C."Garage conversion finished on the drawings and close to the schedule. They were honest that the sewer connection was the unknown, and it was."
- Arjun D.