ADU Design & Permitting in Hollywood, FL: Timeline, Costs, and What the Process Actually Looks Like
ADU design and permitting in Hollywood, FL typically runs 8 to 16 weeks from first site visit to issued permit, with construction adding another 4 to 8 months depending on whether you choose prefab or stick-built. Most homeowners in Hollywood invest between $45,000 and $130,000 for the full design, permitting, and build of an attached or detached accessory dwelling unit. Call (844) 665-0162 and we’ll walk through your lot’s specific constraints, no charge for the initial on-site review.
Hollywood’s position in Broward County’s High Velocity Hurricane Zone means every ADU we design has to meet product-approval and fastener-schedule requirements that don’t exist just one county north. That reality shapes our entire approach, from the first survey to the final inspection walkthrough.
How We Handle ADU Design & Permitting, Start to Finish
We’ve refined this into five clear stages so homeowners know exactly where they stand and what decision is coming next. No surprises, no “we’ll figure it out later.”
Stage 1: Site Feasibility & Zoning Review (Week 1)
We visit your property, measure setbacks, check the Broward County Property Appraiser records for lot coverage and FAR (floor area ratio), and flag any HOA restrictions or utility easements. You’ll know by the end of this visit whether your lot can legally support an ADU and what the maximum allowable footprint looks like. We also pull the existing home’s as-built permits to understand foundation type, roof structure, and whether the original construction predates the 1992 code changes, which affects how we tie the new unit into existing systems.
Stage 2: Schematic Design & Program Lock (Weeks 2-4)
This is where you choose between a detached backyard cottage, a garage conversion, or an attached addition. We produce scaled floor plans, exterior elevations, and a preliminary materials palette. You’ll decide on bedroom count, kitchen configuration, and whether you’re targeting rental income, multigenerational living, or future resale value, each of which changes the layout logic. For Hollywood’s older east-side CBS homes, we often need to address electrical service upgrades and sewer lateral capacity at this stage.
Stage 3: Construction Documents & Engineering (Weeks 5-10)
Our architects finalize permit-ready drawings while structural engineers calculate HVHZ wind loads, specify Miami-Dade NOA-rated connections, and design the foundation to match Hollywood’s variable soil conditions, from the loose sands near Hollywood Beach to the denser limestone-influenced soils west of I-95. This stage also produces the energy compliance package and plumbing isometrics. You don’t make major decisions here, but you do approve the final window and door schedule since those products must carry specific HVHZ approvals that limit your brand options.
Stage 4: Permit Submission & Review (Weeks 11-14)
We submit to the City of Hollywood Building Department and manage the plan review cycle. Broward’s consolidated review typically takes 3 to 4 weeks for ADUs, though resubmittals for HVHZ product-approval documentation can add time if a specifier missed a NOA detail. We handle all corrections and coordinate with the zoning department for any variance needs. You’ll receive weekly status updates, and we schedule the pre-construction meeting once the permit is issued.
Stage 5: Pre-Construction Handoff (Week 15-16)
Final material selections are locked, our trade partners are scheduled, and we walk the site together to confirm utility tie-in points and staging areas. If your project is part of a full Home Additions & ADU in Hollywood scope that includes interior remodeling, we sequence the work to minimize disruption to your main residence.
The Build Path You’ll Choose Between
ADU design and permitting in Hollywood isn’t one-size-fits-all. The path you pick affects timeline, cost, and how much of the design process you control.
- Traditional stick-built on your foundation: Full customization, longest timeline (12-18 months total), highest per-square-foot cost, but you get exactly the layout and finishes you want. Best for irregular lots or when matching an existing home’s architecture matters.
- Prefabricated modular from Abodu, Dvele, Mighty Buildings, or Boxabl: Factory-built to HVHZ specs, craned onto a site-poured foundation, typically 6-10 months from permit to completion. Less design flexibility, but the engineering is pre-validated and the price is more predictable. Mighty Buildings’ 3D-printed units can cut foundation complexity on tight Hollywood Beach lots.
- Garage conversion (where structurally feasible): Uses existing footprint and often existing slab, so permitting moves faster and setbacks aren’t an issue. Only works if the garage has adequate headroom, the foundation is continuous with the main house, and you’re willing to sacrifice covered parking. In Hollywood’s flood-prone areas, we verify the slab elevation against FIRM maps before committing to this path.
- Attached addition with separate entrance: Shares a wall with the main house, reducing exterior envelope costs, but requires fire separation and often triggers full-home electrical upgrades. Works well on the wider west-Hollywood lots where side-yard setbacks allow it.
Our Home Additions & ADU crew will flag which paths your specific lot can support before you invest in full architectural drawings.
What ADU Design & Permitting Costs in Hollywood, FL
| Component | Typical Range |
|---|---|
| Design & architectural drawings | $8,000 - $18,000 |
| Structural engineering & HVHZ calculations | $3,500 - $7,500 |
| Permit fees (City of Hollywood / Broward) | $2,500 - $6,000 |
| Site work, foundation & utility tie-ins | $12,000 - $35,000 |
| Construction (stick-built, per sq ft) | $180 - $280 |
| Construction (prefab module + install) | $140 - $220 |
| Total project range | $45,000 - $130,000 |
Five variables push you toward the high or low end of that range:
1. Existing conditions on site. A clear backyard with direct alley or driveway access keeps site work cheap. Mature oak roots, a failing septic system that needs connection to city sewer, or a significant grade change between house and rear lot line can add $10,000 to $25,000 before construction starts.
2. Utility capacity and routing. If your main electrical panel is already maxed out at 150 amps and the ADU needs its own 100-amp subpanel, you’re looking at a service upgrade and trenching. Same for sewer laterals that need extension or replacement, common in the 1950s-1970s housing stock east of Federal Highway.
3. Material and finish grade. A rental-focused ADU with vinyl flooring, fiberglass shower surrounds, and stock cabinetry runs lean. A unit for aging parents with porcelain tile, Kohler fixtures, and Silestone countertops shifts the budget. You choose the tier; we price it transparently.
4. Foundation type required. Standard monolithic slab on grade is economical. If flood zone requirements or poor soils push us to stem walls or auger-cast piles, costs rise accordingly.
5. Permit complexity. Straightforward zoning compliance keeps permit fees minimal. Variances for reduced setbacks, coastal construction control line issues on the barrier island, or HOA architectural review board approvals add professional time and sometimes third-party consultants.
A written estimate from Groundwork includes all design, engineering, permit fees, and construction labor with material allowances you can adjust. It does not include your own appliance selections, window treatments, or landscaping restoration, which we itemize separately so there’s no confusion.
What Hollywood’s Specific Conditions Mean for Your ADU Project
Hollywood isn’t Fort Lauderdale, and it definitely isn’t Palm Beach. The city sits entirely within Florida’s High Velocity Hurricane Zone, sharing that designation only with Miami-Dade County. Every window, door, roofing assembly, and structural connector we specify must carry a Miami-Dade Notice of Acceptance with explicit HVHZ listing. Contractors who don’t regularly work Hollywood or Miami-Dade often discover this the hard way at permit review, when their standard Florida Product Approval gets rejected and the project stalls for weeks while replacement materials are sourced.
The housing stock here creates two distinct project profiles. East of I-95, in neighborhoods like Hollywood Hills and the original Hollywood Beach residential streets, we work on 1950s-1970s concrete block homes with original flat roofs, jalousie windows, and 100-amp electrical services. These ADU projects almost always require structural hurricane tie-down retrofits, roof deck re-nailing to current standards, and full electrical upgrades before the ADU can even tie in. West of I-95, in Emerald Hills or the newer developments near Full Kitchen Remodeling in Hollywood projects we’ve completed, the 1980s-2000s tract homes have more current framing and utilities, so the ADU work is cleaner and faster.
For properties on the barrier island, ZIP 33019, salt-air corrosion accelerates degradation of any exposed fasteners or aluminum components. We specify stainless steel or hot-dip galvanized hardware with shorter replacement cycles, and if your lot falls within the Coastal Construction Control Line, we manage the additional DEP permit layer that inland Broward projects never encounter.
Many homeowners pair their ADU with interior updates to the main house, and we’ve found that coordinating Cabinets & Countertops in Hollywood selections across both units creates visual continuity and often saves on material freight costs.
Serving Hollywood, FL - Our Local Coverage Area
We’re based in the Hollywood area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked - ADU Design & Permitting in Hollywood
From first site visit to issued permit, expect 8 to 16 weeks depending on complexity and whether your lot requires variances or HOA approval. Prefab paths often move faster because factory engineering is pre-approved, while custom stick-built designs with unique foundations take longer. Call (844) 665-0162 and we can give you a tighter estimate after seeing your specific property.
Yes, absolutely. The City of Hollywood requires full building permits for any ADU, and Broward County’s HVHZ status means additional product-approval documentation for windows, doors, roofing, and structural connections. Attempting to build without permits risks stop-work orders, fines, and inability to legally rent the unit. We handle the entire permit package as part of our design service.
Sometimes, but rarely for a fully independent unit. Most Hollywood homes, especially the older CBS stock east of Federal Highway, need at least electrical service upgrades and often sewer lateral extensions to support a second kitchen and bathroom. During our Week 1 feasibility visit, we trace your existing utilities and tell you exactly what must move versus what can tie in place.
A garage conversion on a slab with existing utility access runs lowest, typically starting around $45,000 total if the structure is sound and no major upgrades are needed. Detached prefab units fall in the middle. Custom stick-built is the premium path. The real savings come from choosing your build path based on what your lot already offers, not forcing a preferred style onto unsuitable conditions.
Our design and permitting service is backed by our commitment to permit approval, meaning we revise and resubmit at no additional fee if the city requests corrections related to our documentation. Construction work carries material warranties through our manufacturer partners, GAF, CertainTeed, and Owens Corning for roofing, Andersen and PGT for windows, and labor coverage that we detail in your specific contract. We don’t offer generic guarantees; we offer named products with their own backing, installed by our accountable team.
Ready to See What Your Lot Can Support?
We’ll visit your Hollywood property, review your zoning and existing conditions, and give you a clear read on whether an ADU makes sense and what path fits your budget. The initial on-site consultation is free, and you’ll leave with a rough footprint, a realistic timeline, and a price range you can actually plan around. Call (844) 665-0162 or request your appointment online.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Hollywood and South Florida homeowners since our founding.