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 Greenacres
A typical home addition in Greenacres runs $45,000-$130,000, while a full detached ADU usually falls between $90,000 and $220,000. Most projects take 8-16 weeks from permit to final walk, though anything near a Lake Worth Drainage District canal needs a separate District right-of-way license that can add 2-4 weeks if your contractor doesn’t file it upfront. Call (561) 475-3903 and we’ll schedule your free estimate, run the canal setback check, and give you a written price before anyone picks up a tool.
We’ve been building in Palm Beach County since 2007, and our crews know the difference between a Greenacres lot that clears the LWDD easement and one that doesn’t. Our Home Additions & ADU team dispatches from our South Florida office and serves Greenacres directly - no out-of-area subcontractors guessing at local drainage rules or canal setbacks.
Why Rowan Construction Group West Palm Beach Is Greenacres’s Preferred Home Additions & ADU Company
Greenacres homeowners tend to research the way they buy appliances: they read the three-star reviews, screenshot the price, and want documentation before they commit. We’ve delivered 4,000-plus projects since 2007, every one with a written price before work started and a documented photo record when the crew left. That discipline is why our projects finish within a few percent of the agreed number - not because we’re optimistic, but because we don’t start without a signed scope and we don’t proceed on a change without a signed change order.
Our crews are background-checked, uniformed, and verified before they arrive. A live person answers calls 24/7. And our 365-Day Done Right Promise is printed on every page, backed by a terms page you can read - not an asterisk. Under Clause 1 of The Haven Standard, the price is written before anyone starts. Under the change-order clause, no work proceeds on a revision until the paperwork is signed. That’s the administrative discipline Haven acquired Rowan for, and it’s what keeps your project from drifting.
We also offer a Free Second Opinion on any written estimate from another contractor. Bring their quote and we’ll review it line by line at no charge. Greenacres customers use this to spot missing permit costs, undefined material specs, or LWDD license agreements that weren’t accounted for.
Our Home Additions & ADU Services in Greenacres
ADU Design & Permitting
Every ADU in Greenacres starts with a survey against two permit layers: the city of Greenacres and, if your lot abuts a canal, the Lake Worth Drainage District. We run the LWDD setback check before we draw a single wall. A detached ADU near the canal laterals off Jog Road or Lake Worth Road needs the District’s 20-foot maintenance right-of-way cleared, plus finished-floor elevation set above the seasonal high water table. We file both permits concurrently so one doesn’t wait on the other. Typical ADU construction in Greenacres runs $90,000-$220,000 depending on size, utility connections, and whether we’re running sewer lateral across a flat, low-lying lot.
Garage Conversion ADU
Converting an existing garage in Greenacres avoids new foundation work, which helps on lots where the water table sits high six months of the year. But a garage conversion still needs to meet current Florida Building Code for habitability - insulation, egress windows, and often an upgraded electrical panel. We see a lot of 1970s and 1980s CBS homes in the Sherwood Lakes and Pine Ridge areas where the original garage slab was poured at grade with no moisture barrier. We test for vapor transmission and specify the correct floor assembly before we quote. Garage conversions in Greenacres typically run $30,000-$80,000.
New Detached ADU
A new detached ADU gives you the most flexibility and the most complexity. In Greenacres, we specify coastal-grade materials from the start: stainless or hot-dip galvanized fasteners, pressure-treated or composite framing where the structure breathes canal air, and sealed paver joints if we’re running a small patio. The inland-spec package - galvanized hardware, untreated railings, standard aluminum - costs less on the draw schedule but corrodes within a few seasons this close to the coast. We quote the coastal spec in writing so you’re not replacing fasteners in year seven. Site prep and utilities on Greenacres’s flat terrain often require engineered fill and careful drainage grading to keep the finished floor above FEMA base flood elevation.
Junior ADU & Interior Conversion
A junior ADU converts existing interior space - often a master suite wing or an attached in-law area - into a separate dwelling unit with its own kitchenette and exterior door. In Greenacres’s garden-style condos and older single-family homes, this can be the most cost-effective path, but it requires verifying that the original structure’s roof-to-wall hurricane strapping can handle the modified load path. Many pre-Andrew CBS homes here lack continuous strapping, and opening walls to add a kitchenette can reveal the gap. We inspect the attic framing before we quote so the number accounts for any retrofit.
Room Additions
A single-room addition - family room, master suite, home office - is the most common request we get from Greenacres homeowners who bought between 2015 and 2025 and need space without moving. We match the existing CBS wall type, tie into the roofline with proper flashing, and specify impact-rated windows if the addition faces the prevailing wind. The room addition range of $45,000-$130,000 covers everything from a 200-square-foot bump-out to a 600-square-foot master wing with full bath.
Second Story Additions
Adding a second story to a 1970s or 1980s CBS ranch in Greenacres requires verifying the foundation and the roof-to-wall connection before design is final. The original construction often predates the post-Andrew strapping requirements, and the load path from a new second floor needs engineered connections that weren’t specified in 1982. We bring a structural engineer to the first site visit, document the existing framing with photos you receive, and build any needed retrofit into the written quote. This isn’t a surprise we find later - it’s a condition we name before you sign.
Sunrooms & Enclosed Patios
A sunroom or enclosed patio in Greenacres needs to survive salt air and the summer wet season. We specify aluminum frames with marine-grade finishes, impact glass rated for Palm Beach County wind zones, and positive drainage away from the existing slab. On canal-side lots, we also verify the LWDD setback so the enclosure doesn’t encroach on the District’s maintenance easement.
ADU Site Prep & Utilities
Site prep on Greenacres’s former agricultural flatlands means managing water, not fighting terrain. The high seasonal water table and flat grades mean new slabs need engineered fill, proper vapor barriers, and finished-floor elevation set with FEMA flood maps in hand. We coordinate sewer lateral extensions, electrical service upgrades, and sometimes well-separation requirements if the property uses septic. All of it is itemized in the written quote before work starts.
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 Greenacres
We source across fifty-plus vetted brands so our written quotes use honest numbers, not inflated allowances. For ADU and addition foundations in Greenacres, we frequently specify Tremron pavers for walkways and patios - their coastal-grade sealers hold up to canal-side salt air better than standard products. For hardscaping adjacent to new structures, Techo-Bloc and Cambridge Pavers both offer permeable paver systems that help manage the flat-lot drainage issues common in the Lake Worth Drainage District. We don’t list brands to impress; we name them so you know what you’re getting and can compare spec-for-spec against other quotes. Everything is documented in the scope, with substitution clauses if a material becomes unavailable.
Common Home Additions & ADU Problems We See in Greenacres Homes
- LWDD easement violations on canal-side lots. Out-of-area contractors regularly draw site plans that ignore the Lake Worth Drainage District’s 20-foot maintenance right-of-way. The city permit gets held up for weeks while the District license agreement is filed retroactively - if it’s possible at all. We run the LWDD check before design starts.
- Slabs poured at grade on high water table lots. Greenacres’s flat, low-lying terrain means seasonal water can sit within inches of the surface. A slab poured without proper elevation and vapor management fails inspection or traps moisture for decades. We engineer fill and specify finished-floor height with FEMA maps in hand.
- Inland-spec materials specified for canal-side salt air. Galvanized fasteners, untreated railings, and standard aluminum window frames corrode faster here than a few miles inland. We specify stainless or hot-dip hardware and marine-grade finishes from the start. Cheaper on paper, more expensive when you replace it.
- Pre-Andrew hurricane strapping missing on load-bearing additions. Adding a room or second story to a 1970s CBS home without verifying the roof-to-wall connection can mean discovering mid-project that the structure won’t carry the new load. We inspect and engineer the retrofit before we quote, not after we open walls.
Pricing for Home Additions & ADU in Greenacres, FL
We put the number in writing before anyone picks up a tool. Here’s what home additions and ADU work costs in the Greenacres market:
| Service | Price Range in Greenacres |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Garage Conversion | $30,000 - $80,000 |
What moves you within these ranges: size, finish level, structural retrofit needs, and utility extension distance. A second-story addition on a 1978 CBS home with no hurricane strapping costs more than a same-size addition on a 2005 build because of the engineered retrofit. An ADU on a canal-side lot with LWDD filing and engineered fill costs more than the same unit inland. We itemize every line in the written quote - materials by brand, labor by phase, permits and fees separate - so you know what you’re paying for and can compare apples-to-apples. Call (561) 475-3903 for your free estimate. The price we write is the price you pay, minus any change you sign.
We Also Serve Cities Near Greenacres
Our crews build throughout central Palm Beach County. We also serve Home Additions & ADU in Greenacres neighboring communities including West Palm Beach, Wellington, Palm Beach, and Royal Palm Beach. Each city’s permit environment and drainage conditions differ - Wellington’s equestrian zoning, Palm Beach’s architectural review - and we adjust the filing strategy accordingly.
Serving Greenacres, FL - Our Local Coverage Area
We’re based in the Greenacres 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 Greenacres
Yes, if your lot abuts or is crossed by an LWDD lateral canal, you need a District right-of-way use permit in addition to your city building permit. This dual-approval step doesn’t exist in most neighboring municipalities, and out-of-area contractors often miss it. We run the LWDD setback check before we draw walls and file both permits concurrently so one doesn’t wait on the other. Call (561) 475-3903 and we’ll verify your lot’s status at no charge during the estimate.
Three factors: the LWDD license agreement adds filing time and fees, engineered fill and elevated slabs cost more than standard foundations, and coastal-spec materials - stainless fasteners, marine-grade finishes, sealed joints - run higher than inland-grade alternatives. We quote the coastal spec in writing because the cheap version costs more when you replace corroded hardware in year seven.
Greenacres’s flat, low-lying terrain and high seasonal water table mean slabs need engineered fill, vapor barriers, and finished-floor elevation set above FEMA base flood levels. A slab poured at grade traps moisture and can fail final inspection. We engineer the foundation with flood maps in hand and document the elevation with photos you receive. Call (561) 475-3903 and we’ll walk through the site prep specifics for your lot.
Yes, but the existing structure needs verification first. Most pre-Andrew CBS homes in Greenacres lack continuous roof-to-wall hurricane strapping, and the foundation may need reinforcement for the new load path. We bring a structural engineer to the first site visit, document existing conditions with photos, and build any needed retrofit into the written quote. The second story is buildable; we just don’t promise it before we inspect.
The Haven Standard’s change-order clause: no work proceeds on a revision until the change order is signed. Since 2007, this discipline has kept our projects within a few percent of the agreed price across 4,000-plus jobs. The quote you receive is flat, with a written scope and written warranty. If you don’t sign a change, the price doesn’t change. Call (561) 475-3903 for a written estimate you can screenshot and compare.
Ready to add space without moving? Call (561) 475-3903 to schedule your free estimate. We’ll run the LWDD check, verify your lot’s buildable area, and deliver a written price with line-item specs before anyone picks up a tool. Under The Haven Standard, the number is fixed when you sign, and the 365-Day Done Right Promise backs every project we build in Greenacres.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Greenacres since 2007.