Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across The Acreage
A typical home addition or ADU in The Acreage runs $45,000-$130,000, with detached ADU construction reaching $90,000-$220,000 depending on utility ties and foundation work. We scope every project around your existing septic drain field, well setbacks, and the wet-season water table before quoting - because in this unincorporated Palm Beach County community, those factors determine what can be built and exactly where. Call (561) 475-3903 to schedule your free estimate; our crews serve The Acreage from our South Florida coordination office, and we pull county records before staking anything.
Why Rowan Construction Group West Palm Beach Is The Acreage’s Preferred Home Additions & ADU Company
We’ve worked the estate lots of The Acreage long enough to know that a 1.25-acre parcel doesn’t mean 1.25 acres of buildable space. The septic drain field and well setbacks carve out the real envelope, and we find them before we quote - not after permits are issued. Our Home Additions & ADU team has walked enough drain fields off 60th Street North and Seminole Pratt Whitney Road to know that county records sometimes disagree with what’s actually in the ground.
Homeowners in The Acreage choose us because we put the number in writing before anyone picks up a tool. Under Clause 1 of The Haven Standard, every quote is a flat price with a written scope and a written warranty. No “call for pricing.” No open-ended allowances. The 365-Day Done Right Promise is printed on every page, backed by terms you can read, not an asterisk.
Our crews are background-checked and uniformed; a live person answers calls 24/7. Every visit produces a documented photo record - included, not optional - so you see what we found and what we did. Across 4,000-plus projects since 2007, our signed-change-order discipline has kept costs within a few percent of the agreed price. That’s the administrative discipline Haven acquired Rowan for.
Our Home Additions & ADU Services in The Acreage
ADU Design & Permitting
Every ADU in The Acreage starts with a county records pull, not a sketch. We obtain Palm Beach County’s on-site sewage file, walk the drain field, and locate the well head before the design phase begins. The permit application then flows through the county’s unincorporated-area building division - not a city hall - with its own review timelines and inspector routing. We handle that routing, and we know the inspectors who cover The Acreage. A typical ADU design and permitting package in The Acreage runs $90,000-$220,000 for construction, with site prep and utility ties often representing a significant portion because every connection is private.
Garage Conversion ADU
Many homes in The Acreage have detached garages, workshops, or equestrian structures with their own permitting history. Converting one to an ADU means reconciling that history with current Florida Building Code, tying into existing well and septic capacity, and often upgrading the electrical service from overhead to buried to clear the buildable envelope. Garage conversion ADUs in The Acreage typically cost $30,000-$80,000. We verify the structure’s original permit status before quoting - an unpermitted outbuilding requires a different approach than one that passed county inspection in 1994.
New Detached ADU
This is where The Acreage’s large lots shine - if the drain field cooperates. A new detached ADU gives you a standalone dwelling with full kitchen and bath, ideal for rental income or multigenerational living. We prioritize these projects because the lot size supports them, but the real work is in the site prep: grading for the shallow water table, trenching for water and septic lines, and sometimes relocating the drain field itself if the county approves. New detached ADU construction in The Acreage runs $90,000-$220,000. We use prefabricated components from brands like Plant Prefab and Boxabl where they speed the schedule without compromising the structural spec.
Junior ADU & Interior Conversion
Not every project needs a new foundation. A junior ADU - an interior conversion with separate entrance and efficiency kitchen - works inside your existing footprint, avoiding drain field conflicts entirely. These suit homeowners near Seminole Pratt Whitney Road or 60th Street North who want rental income without the site complexity of a detached structure. We assess your existing septic capacity and electrical panel before designing; an overloaded system triggers a county-mandated upgrade that changes the price. Junior ADU conversions typically fall within the lower portion of the $45,000-$130,000 room addition range.
ADU Site Prep & Utilities
In The Acreage, site prep is rarely a formality. We trench for water lines from your well, run septic to the drain field, and sometimes install propane lines or buried electrical - all private systems, all requiring county inspection. The shallow wet-season water table means excavation windows matter; we schedule footing work outside June-September when possible, and when we can’t, we engineer elevated slabs and dewatering protocols. ADU site prep and utilities in The Acreage run $45,000-$130,000 depending on distance from existing ties and soil conditions.
Room Additions
Adding a bedroom, primary suite, or great room to your existing home requires the same records pull as an ADU. On a 1.3-acre lot off Hall Boulevard, our crew was adding a 400-square-foot primary suite when we pulled the county’s on-site sewage records and walked the drain field before staking. The proposed footprint landed squarely on the lateral lines, so we shifted the addition six feet east, re-set the footer elevation above the seasonal high water table, and kept the project on its original draw schedule. The inspection sign-off cleared on the first rough-in pass, and the homeowner got the suite without abandoning the design. Room additions in The Acreage run $45,000-$130,000.
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.
BeforeAfterTrusted Brands We Service in The Acreage
We source across fifty-plus vetted brands - KraftMaid and Wellborn cabinets, Cambria and Caesarstone countertops, GAF and Owens Corning roofing, Kohler and Toto fixtures - giving the written quote honest numbers rather than inflated ones. For ADU construction in The Acreage, we also work with modular and panelized suppliers including Mighty Buildings and Plant Prefab, whose systems can reduce on-site labor days and weather exposure on open lots. Every brand is named in your quote with model numbers and spec sheets, not generic descriptions. Local material coordination happens from our South Florida office; crews don’t wait on deliveries because we don’t order after permits - we order after the signed change order, which is always before work starts.
Common Home Additions & ADU Problems We See in The Acreage Homes
- Staking before pulling septic records. We see this on inherited projects - a homeowner hires a designer who stakes the addition in the side yard, only to discover the drain field runs exactly there. Pulling county records first costs nothing; redesigning after permits are issued costs thousands and delays the project by months.
- Standard-depth footings in wet-season conditions. Western Palm Beach County’s water table sits 12-24 inches below grade from June through September. Footings poured to inland standards collapse or heave. We engineer elevated foundations and schedule accordingly.
- Assuming municipal utilities. The Acreage has no city water or sewer. Every addition must account for well capacity, septic flow, and sometimes propane tank relocation. Treating the job like a Royal Palm Beach or Wellington project means missed scope and change orders you didn’t budget for.
- Underestimating material haul and equipment access. A 1.25-acre lot sounds spacious until you’re threading a concrete pumper around existing outbuildings, horse paddocks, and mature oak hammocks. We walk the access route with the homeowner before quoting delivery logistics.
Pricing for Home Additions & ADU in The Acreage, FL
Here’s what home additions and ADUs cost in The Acreage’s market:
| Service | Price Range |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
| ADU Site Prep & Utilities | $45,000-$130,000 |
| Room Additions | $45,000-$130,000 |
| Second Story Additions | $45,000-$130,000 |
| Sunrooms & Enclosed Patios | $45,000-$130,000 |
Three factors push The Acreage projects toward the higher end: private utility ties (well, septic, propane) that must be extended or upgraded; elevated foundations to account for the shallow water table; and longer material hauls with limited equipment access on rural-residential lots. Every quote includes these as line items, not buried contingencies. Bring a competitor’s written estimate and we’ll review it line by line at no charge - our Free Second Opinion is a standing offer. Call (561) 475-3903 for your free estimate.
We Also Serve Cities Near The Acreage
Our crews work throughout unincorporated Palm Beach County and adjacent municipalities, including The Acreage itself plus West Palm Beach, Westgate, Riviera Beach, and Lake Park. Each jurisdiction has its own permitting authority - city halls versus county building divisions - and we route accordingly. The same documentation discipline applies everywhere: written price before work starts, signed change orders, photo records on every visit.
Serving The Acreage, FL - Our Local Coverage Area
We’re based in the The Acreage 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 - Home Additions & ADU in The Acreage
Usually yes, but the buildable envelope is often much smaller than the lot suggests because of septic drain field coverage and mandatory well setbacks. We pull county on-site sewage records and physically walk the drain field before designing to confirm exactly where the structure can go. Call (561) 475-3903 to schedule a free site evaluation - estimates are free.
The water table rises to within 12-24 inches of grade from June through September, which can collapse standard excavations and heave slabs poured without elevation adjustments. We engineer raised footings and schedule critical digging outside the wet season when possible. Call (561) 475-3903 and we’ll walk you through the seasonal schedule for your specific project - estimates are free.
County permit - The Acreage is unincorporated, so all permits flow through Palm Beach County’s unincorporated-area building division, not a city hall. Review timelines and inspector routing differ from incorporated cities like Royal Palm Beach or Wellington. We handle that routing as part of our standard service. Call (561) 475-3903 for a free estimate.
We locate every utility, verify flow and capacity against the addition’s demand, and quote the extension or upgrade as a line item before work starts. A written price with written scope - no allowances, no surprises. Typical room additions in The Acreage run $45,000-$130,000 depending on utility complexity. Call (561) 475-3903 for an exact quote - estimates are free.
Yes - garage conversions often inherit existing structures with partial permitting history, which we reconcile with current code, while new detached ADUs start from raw site prep and full utility extension. The price reflects the difference: garage conversions run $30,000-$80,000 versus $90,000-$220,000 for new detached units. Both get the same written-quote discipline and 365-Day Done Right Promise. Call (561) 475-3903 to discuss which fits your lot - estimates are free.
Ready to build? Call (561) 475-3903 to schedule your free estimate. Grant Rowan and our team will pull the county records, walk your site, and deliver a written price before any work starts - that’s Clause 1 of The Haven Standard, and it’s how we’ve operated since 2007.
Written by Grant Rowan, Owner at Rowan Construction Group, serving The Acreage since 2007.