Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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Before
AfterTrusted Home Additions & ADU for West Palm Beach Homeowners
Our Home Additions & ADU in West Palm Beach typically run $45,000-$130,000 for room additions and $90,000-$220,000 for detached accessory dwelling units, with most projects taking 3-8 months from permit to final inspection. Rowan Construction Group, founded in 2007 and operating under The Haven Standard, has delivered 4,000-plus projects across seven trades, every one with a written price before work started and a documented photo record when the crew left. If you’re weighing an in-law suite against moving, or converting a garage in Flamingo Park into rental income, we’re the contractor that puts the number in writing before anyone picks up a tool. Call (561) 475-3903 to schedule your free estimate.
What Our Home Additions & ADU Service Includes
ADU Design & Permitting
An accessory dwelling unit starts with a site plan that satisfies West Palm Beach’s zoning setbacks, parking requirements, and utility tie-in codes, not a sketch on a napkin. We produce architectural drawings, structural calculations, and MEP plans in-house, then shepherd them through the city’s planning and building departments. Most West Palm Beach ADU permits clear in 8-12 weeks when the submittal is complete the first time; our discipline is submitting complete packages, which is why we track every revision request back to its source.
Garage Conversion ADU
Converting an existing garage in neighborhoods like Northwood or El Cid into a habitable unit means raising the slab, insulating to Florida energy code, and adding a kitchenette and full bath where none existed, similar to our Home Additions & ADU in North Palm Beach projects. We assess the existing foundation’s capacity, the electrical service panel’s amperage, and the sewer lateral’s flow rate before quoting, because surprises after demolition are expensive. A typical garage conversion ADU in West Palm Beach runs $30,000-$80,000, and we deliver that range as a written flat price with a written scope before any work starts.
New Detached ADU
A standalone structure in your backyard, whether a 400-square-foot studio or a 1,200-square-foot two-bedroom, requires new foundation, framing, roofing, and full utility connections independent of the main house. We handle the site prep, the septic or sewer tap, the electrical service upgrade if needed, and the final certificate of occupancy. In West Palm Beach’s coastal climate, we specify impact-rated windows and proper moisture barriers as standard, not upgrades, because the Haven Standard defines what “done right” means before the customer asks.
Junior ADU & Interior Conversion
A Junior ADU, or JADU, is created within the existing footprint of your primary residence, typically by partitioning a portion of the home with a separate entrance and a small efficiency kitchen. This works well in West Palm Beach’s older homes near downtown, where lot coverage limits prevent detached construction but the floor plan has underused square footage. We evaluate egress requirements, fire separation, and the feasibility of a separate meter before recommending this path, and we quote it with the same written flat price discipline as any other project.
ADU Site Prep & Utilities
Before framing goes up, the site needs clearing, grading for positive drainage away from both structures, and utility rough-ins that meet Home Additions & ADU - Greenacres and Palm Beach County cross-connection control requirements. We coordinate the trenching, the sewer lateral extension, the electrical service upgrade with Florida Power & Light, and the water meter split. Our crews document each phase with dated photos, included as standard, so the customer and the inspector both see what was buried before it was covered.
Room Additions
A single-room addition, whether a master bedroom expansion in The Acreage or a family room extension in Palm Beach Home Additions & ADU territory, ties into the existing roofline, foundation, and HVAC system with surgical precision. We match the existing floor elevation, the wall stud spacing, and the exterior finish so the seam disappears. The quote includes a written scope addressing structural integration, insulation continuity, and the permit inspection schedule, because Clause 1 of the Haven Standard is the whole point.
Second Story Additions
Adding a second floor to a single-story home in West Palm Beach requires a structural engineer’s analysis of the existing foundation and first-floor walls, which were never designed to carry the load. We bring in our engineer early, produce the calculations, and quote the foundation reinforcement, the stair integration, and the full build-out as a single flat price. This is not a project where “we’ll figure it out as we go” works; every change order is signed before the corresponding work proceeds, which is the administrative discipline that has kept our projects within a few percent of the agreed cost since 2007.
Sunrooms & Enclosed Patios
Enclosing an existing patio or building a new sunroom in West Palm Beach means navigating the distinction between conditioned space and unconditioned space in the Florida Building Code, which affects insulation, glazing, and HVAC requirements. We engineer for the wind load, specify tempered or laminated glass per the exposure, and tie the roof into the existing structure with proper flashing. The result is a space that passes inspection, doesn’t leak in a summer storm, and adds real square footage to your home’s value.
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.
Brands We Service for Home Additions & ADU
Our sourcing depth across fifty-plus vetted brands gives the written quote honest numbers rather than inflated ones. For kitchenettes and full kitchens within ADUs, we specify Kohler sinks and faucets for their ceramic disc valve reliability in hard water conditions common in West Palm Beach’s municipal supply, and Moen shower valves for their 1225 cartridge design that a homeowner can service without calling a plumber. For countertops in compact ADU kitchens where every inch matters, Caesarstone quartz offers consistent slab dimensions and stain resistance that holds up to rental turnover. We’ve installed these brands across hundreds of units and can show you the spec sheets, not just the showroom samples.
Whether your plans call for Kohler, Moen, Caesarstone, or any other make, we can source it, warranty it, and document the installation. Our relationships with distributors in Palm Beach County mean we don’t markup materials to recover a vague “project management fee”; the line-item price in your written quote reflects what we actually pay, plus our labor, with no hidden category. If you have a preferred brand not listed here, we vet it for availability and warranty support before including it in the scope.
BeforeAfterSigns You Need Home Additions & ADU Right Now
- Your household has outgrown the existing floor plan. Three bedrooms for five people means someone’s working from the dining table, and in West Palm Beach’s market, selling and buying up carries $50,000-$80,000 in transaction costs plus a higher mortgage rate. An addition or ADU solves the space problem without the moving problem.
- You’re paying for off-site storage that exceeds $200 monthly. A garage conversion ADU or room addition that reclaimsthat space pays for itself in 12-15 years at current storage rates, and you regain daily access to your belongings. We see this pattern regularly in neighborhoods like Southland Park, where original 1,200-square-foot homes never anticipated modern accumulation.
- Aging parents need proximity without loss of independence. The “granny flat” model works when the unit has a separate entrance, kitchen, and bath, which is the legal definition of an ADU in West Palm Beach. Moving parents into a detached unit preserves family dynamics that a shared hallway would erode.
- Your property has rental income potential you’re not capturing. West Palm Beach’s short-term rental market and the presence of Palm Beach Atlantic University create demand for small, well-located units. An ADU that rents for $1,500-$2,200 monthly recovers its construction cost in 5-8 years, a return that improves if you self-manage.
- The garage or patio structure is deteriorating and needs replacement anyway. If you’re facing $15,000-$25,000 to rebuild a failing garage, the incremental cost to convert it to habitable space is often 40-60% less than starting from bare ground. We assess the existing slab, walls, and roof structure to determine whether this path is viable before quoting.
Our Home Additions & ADU Process - Step by Step
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Site evaluation and feasibility study. We visit your West Palm Beach property, measure the lot, photograph the existing structure, and identify zoning constraints like setbacks, height limits, and impervious surface ratios. Within 48 hours, you receive a written feasibility summary stating what can be built, what permits will be required, and the anticipated timeline.
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Written flat-price quote with line-item scope. Under Clause 1 of the Haven Standard, the price is written before anyone starts. Your quote breaks out design, permits, materials, labor, and inspections with specific brands and quantities named. The 365-Day Done Right Promise is printed on the same page, not referenced by asterisk.
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Design development and permit submittal. Once you approve the quote, our architect produces construction drawings, our engineer stamps the structural calculations, and we submit to the City of West Palm Beach Building Division. We track the review status weekly and respond to corrections within 72 hours.
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Construction with documented photo record. A background-checked, uniformed crew arrives on schedule, and every visit produces dated photos of progress, conditions found, and work completed. These are uploaded to your project portal as standard, not an upgrade you pay extra for. No change proceeds without a signed change order, which is why our projects finish within a few percent of the agreed number.
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Final inspection, walkthrough, and warranty activation. We pass all inspections, conduct a punch-list walkthrough with you present, and deliver the final documentation: permit closure, photo archive, and written warranty. The 365-Day Done Right Promise begins at certificate of occupancy. If it’s not done right, we make it right.
How Much Does Home Additions & ADU Cost in West Palm Beach?
A typical room addition in West Palm Beach runs $45,000-$130,000 depending on square footage, foundation type, and whether the existing HVAC and electrical require upgrading. ADU construction, which includes full kitchen and bath infrastructure, ranges $90,000-$220,000 for detached units and $30,000-$80,000 for garage conversions. Second-story additions fall at the higher end of the room-addition range because of the structural reinforcement required to bring a 1960s slab-on-grade home up to current load standards.
Several factors move the needle within these ranges. Soil conditions in West Palm Beach’s coastal plain sometimes require helical piers or auger-cast piles where standard footings would suffice inland; we test bearing capacity during the feasibility study and quote the foundation accordingly. Impact-rated windows and doors, required in the wind-borne debris region, add $8,000-$25,000 over standard glazing but are non-negotiable for permit approval. Kitchenette specifications, whether a two-burner cooktop with mini-fridge or a full four-burner range with dishwasher, create a $4,000-$12,000 swing within the same footprint.
To avoid overpaying, get a written scope that names brands and quantities, not a square-foot allowance that shifts risk to you. Our quotes specify “Caesarstone Calacatta Nuvo, 2cm, 24 square feet” rather than “countertops, $3,500 allowance,” because the latter invites change orders when your selection exceeds the budget. 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.
Every free estimate includes the site evaluation, the feasibility summary, the written flat price, and the 365-Day Done Right Promise terms. Call (561) 475-3903 to schedule yours.
Home Additions & ADU Near West Palm Beach - Our Service Area
Rowan Construction Group serves West Palm Beach and the surrounding communities including Home Additions & ADU in Westgate, Home Additions & ADU in Riviera Beach, Lake Park, North Palm Beach, Royal Palm Beach, Palm Beach, Palm Beach Gardens, Palm Springs, Greenacres, The Acreage, and Wellington. Typical response time for a feasibility evaluation is 24-48 hours in the urban core and 48-72 hours in outlying areas like The Acreage, where travel time is longer but the lot sizes often make ADU construction more straightforward. We pull permits in each jurisdiction and understand the municipal variations, from Palm Beach County’s unified code to the individual requirements of smaller towns.
Serving West Palm Beach, FL - Our Local Coverage Area
We’re based in the West Palm 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.
Frequently Asked Questions - Home Additions & ADU in West Palm Beach
A home addition expands your existing residence with new conditioned space, while an ADU, or accessory dwelling unit, is a separate living quarters with its own kitchen, bath, and entrance, either attached or detached from the main house. You need one if your household has outgrown its floor plan, you’re seeking rental income, or you want to house family members with independence preserved. In West Palm Beach’s 2024 zoning update, ADUs are permitted by right in most residential districts, removing the variance requirement that previously delayed projects by 4-6 months. Call (561) 475-3903 to discuss whether your property qualifies.
Room additions typically take 3-5 months from permit to completion, while detached ADUs run 6-8 months due to the additional utility connections and inspections. Garage conversions are faster, often 2-4 months, because the shell exists and utility tie-ins are shorter. West Palm Beach’s building department currently processes complete ADU permit packages in 8-12 weeks; incomplete submittals, which we avoid, can stretch to 20 weeks. Call (561) 475-3903 for a timeline specific to your project.
Room additions cost $45,000-$130,000, detached ADUs run $90,000-$220,000, and garage conversions fall at $30,000-$80,000, all as flat written prices with scopes before work begins. The variation within each range depends on foundation requirements, kitchen and bath specifications, and whether the existing electrical service needs upgrading from 150 to 200 amps. We deliver the exact number for your project after the feasibility study, not a ballpark that changes later. Call (561) 475-3903 for your free estimate.
Yes, we specify and install Kohler, Moen, and Caesarstone regularly in ADU kitchenettes and full kitchens, and we stock common repair parts for warranty service. Our quotes name the exact model and finish, not a generic equivalent, so you know what you’re receiving. If your plans include another brand, we vet it for availability and warranty support in Palm Beach County before including it. Call (561) 475-3903 to discuss material specifications.
Home additions and ADU construction are planned projects, not emergencies, and we do not promise same-day dispatch for this trade. A live person answers our phones 24/7 to schedule feasibility evaluations, answer questions about active projects, and address any urgent issue that arises during construction, such as a weather event compromising an open structure. For genuine emergencies like storm damage to an existing roof, our roofing division responds with temporary protection. Call (561) 475-3903 to reach a live person.
Every project carries the 365-Day Done Right Promise: if it is not done right, Rowan makes it right, backed by The Haven Standard, not a handshake. This covers workmanship, material installation, and functional performance of all systems we install. Beyond one year, manufacturer warranties on Kohler fixtures, Moen valves, Caesarstone surfaces, and other branded materials remain in effect per their terms, which we document and transfer to you at completion. Call (561) 475-3903 for the full warranty terms page.
Gather your property survey, any existing architectural drawings, and a rough idea of your budget range and intended use, rental or family. Clear personal items from the construction zone, including garage contents for conversions, and ensure access for our equipment and material deliveries. We’ll handle the permit application, the utility coordination, and the inspection scheduling; your preparation is mostly informational so we can produce an accurate written quote. Call (561) 475-3903 to schedule your free estimate and feasibility evaluation.
Schedule Your Home Additions & ADU Service in West Palm Beach Today
Call (561) 475-3903 to schedule your free estimate. You’ll receive a site evaluation, a written feasibility summary, and a flat-price quote with line-item scope before any work starts. The 365-Day Done Right Promise, the documented photo record, and the Haven Standard’s signed-change-order discipline come with every project. A live person answers our phones 24/7.
Written by Grant Rowan, Owner at Rowan Construction Group, serving West Palm Beach since 2007.