ADU Site Prep & Utilities in Hollywood, FL: What It Costs and How Long It Takes
ADU site prep and utilities in Hollywood typically runs $45,000-$130,000 for the full groundwork phase, with most projects taking 4-8 weeks before the structure goes up. That span covers soil prep, foundation excavation, utility trenching and connections, drainage, and the concrete pour - everything that happens before walls arrive. Call (844) 665-0162 for a free on-site estimate and we’ll walk your property with you.
How We Handle ADU Site Prep & Utilities, Start to Finish
We’ve learned that homeowners in Hollywood worry most about what happens while they’re living next to a construction zone. Here’s the actual sequence we follow, with the decisions you’ll need to make at each point.
Stage 1: Site survey and utility locate (Days 1-3)
We pull permits with the city, schedule Florida 811 utility marking, and run a topographic survey to catch drainage issues early. You’ll decide whether we’re connecting to existing sewer and water laterals or running new lines to the street - a choice that can swing the budget by $8,000-$15,000 depending on distance and depth.
Stage 2: Demolition and rough clearing (Days 4-7)
Existing sheds, old slabs, and mature tree roots come out. In Hollywood’s older east-side neighborhoods near Hollywood Boulevard and Federal Highway, we regularly hit original 1960s concrete pads poured without rebar - they shatter instead of lift, adding debris hauling time. We handle the haul-off; you confirm the final footprint dimensions before we cut.
Stage 3: Rough grading and drainage (Days 8-14)
Hollywood’s flat terrain hides water problems. We grade for positive flow away from both structures, install French drains or catch basins where the water table sits high, and compact the subgrade to 95% density. You’ll choose between standard PVC drainage or HDPE for areas with aggressive tree roots - HDPE costs more upfront but won’t crack.
Stage 4: Utility rough-in and foundation prep (Days 15-28)
Electrical conduit, water main, sewer lateral, and gas line get trenched, bedded, and stubbed to the ADU footprint. For the foundation, you’ll pick between a monolithic slab (faster, $12-$18 per square foot) or stem wall with crawl space (better for flood-prone Hollywood lots, $18-$28 per square foot). We pour only after Broward County plumbing and electrical inspectors sign off on the rough.
Stage 5: Final grade and pad completion (Days 29-35)
The slab cures for 7 days minimum, we backfill trenches with flowable fill to prevent settlement, and lay the finish grade. At this point, your Home Additions & ADU in Hollywood project is ready for framing - whether that’s our crew with traditional stick-built or a prefab unit from one of our partners like Abodu or Mighty Buildings.
The Material and Spec Choices That Shape Your ADU Site Prep & Utilities Job
- Foundation type: Monolithic slab pours in 2-3 days and suits well-drained western Hollywood lots in 33027 or 33029. Stem walls with raised slabs handle the seasonal flooding and saturated soils we see closer to the Intracoastal - they add $6,000-$12,000 but prevent the cracked slabs we’ve repaired in older Hollywood Hills and Lawn Acres homes.
- Concrete mix design: Standard 3,000 PSI concrete works for most ADU foundations. For coastal lots in 33019 or anywhere within a mile of the water, we spec 4,000 PSI with corrosion-inhibiting admixture - the salt air here eats standard rebar in 15 years instead of 40. The upgrade runs roughly $800-$1,400 for a typical 600-square-foot ADU pad.
- Drainage piping: PVC Schedule 40 is the default for residential drainage. On lots with mature oak or ficus canopies common in central Hollywood, we recommend HDPE corrugated pipe with a geotextile wrap - it’s flexible enough to survive root intrusion without the joints that PVC depends on. Adds $400-$900 to the drainage line.
- Electrical service routing: Tapping the existing main panel is cheapest when the ADU sits within 50 feet. Beyond that, or when the original panel is full - standard in 1950s-1970s CBS homes we work on east of I-95 - you’ll need a service upgrade or a dedicated meter. That conversation starts with FPL, and we coordinate the trenching to their spec.
- Water and sewer lateral material: Copper is the historical standard in Hollywood, but PEX-A with expansion fittings has become our preference for new lateral runs - it handles the ground movement from our wet-season saturation cycles better, and it’s easier to repair if a future landscape project nicks the line. Some HOAs in Emerald Hills or Hollywood Lakes still require copper; we verify before ordering.
What ADU Site Prep & Utilities Costs in Hollywood, FL
Expect $45,000-$130,000 for complete ADU site prep and utilities in Hollywood. The table below breaks out where that money goes.
| Component | Typical Range |
|---|---|
| Site clearing and demolition | $3,500-$8,000 |
| Rough grading and drainage | $4,000-$10,000 |
| Utility trenching and rough-in | $8,000-$22,000 |
| Foundation excavation and concrete | $12,000-$35,000 |
| Permits, surveys, and inspections | $2,500-$6,500 |
| Final grading and restoration | $2,000-$5,000 |
Five factors push you toward the high or low end:
1. Distance to existing utilities. A 15-foot lateral extension to a slab ADU in west Hollywood costs fractionally more than the connection itself. Running 80 feet of new sewer to the curb on a deep east-side lot can hit $14,000 before the foundation work starts.
2. Soil condition and water table. We’ve hit groundwater at 18 inches in Driftwood and Hollywood Hills properties during rainy season - that means dewatering, imported fill, and a raised foundation design. Dry, well-draining lots in 33029 might see none of that.
3. Foundation complexity. A simple monolithic slab on grade is our most common pour. Flood-zone requirements, FEMA base elevation rules, or architect-designed stem walls with crawl-space access add concrete, rebar, and formwork labor.
4. Structural remediation of the main house. When your ADU electrical ties into a 1960s Zinsco or Federal Pacific panel - both common in pre-1975 Hollywood stock - the service upgrade isn’t technically “site prep,” but it blocks your CO until it’s done. We flag this during estimate so you’re not surprised.
5. Coastal Construction Control Line proximity. Properties on the barrier island or within the CCCL zone need DEP permits for any ground-disturbing work. That adds 3-6 weeks to permitting and $1,500-$4,000 in application and survey costs that inland Broward projects avoid entirely.
Our written estimates itemize each line above. What they don’t include: landscaping restoration, driveway or walkway repair disrupted by trenching, or the ADU structure itself - that’s quoted separately once you’ve chosen stick-built or prefab.
What Hollywood Homes Specifically Do to This Job
Hollywood sits entirely within Florida’s High Velocity Hurricane Zone, sharing that designation only with Miami-Dade County. Every ADU site prep and utilities project here must use HVHZ-listed assemblies backed by Miami-Dade Notices of Acceptance - a requirement invisible on standard Florida Product Approval searches and one that routinely catches contractors from Palm Beach or Central Florida off-guard at the Broward permit desk. We’ve seen projects stall for weeks while non-HVHZ rebar, fasteners, or window assemblies get swapped for compliant alternatives.
The housing stock splits the job in two. East of I-95, in ZIPs like 33020 and 33021, we work on 1950s-1970s CBS homes built for the Northeast snowbird market - original flat roofs, jalousie windows, and aging electrical panels that complicate utility tie-ins. The foundation work often turns up undocumented concrete pads, abandoned septic tanks, or original cast-iron sewer laterals that need full replacement before the ADU can connect. West of the interstate, in 33024 through 33029, the 1980s-2000s tract homes have more current infrastructure but stricter HOA design covenants in communities like Emerald Hills or West Lake Village that govern setback, height, and exterior finish - rules we verify before the first shovel hits dirt.
Salt-air corrosion on the barrier island strip in 33019 forces shorter replacement cycles for exposed rebar, aluminum conduit, and structural fasteners. We spec hot-dip galvanized or stainless hardware within a mile of the Atlantic, and we never pour standard concrete without corrosion inhibitor in those zones. The DEP permit layer for CCCL properties adds time, but skipping it isn’t an option - we’ve seen unpermitted coastal work red-tagged mid-construction, with the homeowner holding the cost of demo and restart.
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 Site Prep & Utilities in Hollywood
Most projects run 4-8 weeks from permit pull to cured slab, with coastal CCCL properties adding 3-6 weeks for DEP approval. Weather delays in Hollywood’s wet season (June-October) can push concrete pours, so we schedule foundation work for drier windows when possible. Call (844) 665-0162 and we’ll review your specific timeline.
Hollywood requires separate plumbing, electrical, and building permits for the site work phase, all coordinated through Broward County’s unified permitting system. We pull the full bundle upfront so inspections cascade properly - plumbing rough before concrete pour, electrical rough before backfill. Our Home Additions & ADU crew handles this as part of our single-source process.
Sometimes, if your main panel has capacity and the sewer lateral is within 25-30 feet of the ADU footprint. In Hollywood’s older east-side homes, we more often find full panels and undersized laterals that require upgrades - we map this out in the first site visit so you know before we price the foundation. The Hollywood properties we work on in 33027 and 33029 tend to have fewer constraints.
ADU site prep is often more complex because you’re building a standalone structure with independent utilities, not tying into an existing envelope. That means dedicated sewer and water laterals, separate electrical service or subpanel, and often a longer trench run. Homeowners often pair this work with Small & Partial Kitchen Remodels in Hollywood or Full Bathroom Remodeling in Hollywood on the main house while we’re already on-site with equipment.
We warranty our workmanship on foundations, drainage, and utility rough-ins against defects in installation. Material warranties come from the manufacturers - the concrete supplier, pipe manufacturer, or rebar mill. The critical protection is in the written estimate: we specify the mix design, compaction test results, and inspection sign-offs that prevent disputes later. Ask us for sample warranty language when we meet.
Get Your Hollywood Property Assessed for ADU Site Prep
We’ll walk your lot, flag the utility routing, and give you an itemized estimate for ADU site prep and utilities with no obligation. Call (844) 665-0162 to schedule - most Hollywood appointments happen within 48 hours, and we’ll bring the survey notes and permit checklist so you know exactly what comes next.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving Hollywood since our founding in Fort Lauderdale.