Trusted Home Additions & ADU for South Florida Homeowners
Home additions and ADU construction in South Florida typically run $45,000-$130,000 for room additions and $90,000-$220,000 for full detached ADUs, with most projects permitting and building within 4-8 months depending on municipality. Groundwork Construction Co. handles every phase, from ADU Design & Permitting through final inspection, so you’re not coordinating architects, engineers, and separate trades across Palm Beach County. Call (844) 665-0162 to discuss your property and get a free estimate with real numbers.
Raymond Estevez and our team have guided homeowners through the full expansion process in South Florida’s unique regulatory environment, where coastal wind codes, flood zone requirements, and HOA restrictions can derail projects that aren’t planned with local knowledge from day one. We don’t hand you off to a separate “addition specialist.” Our crew manages structural, electrical, plumbing, roofing, and finish work under one contract, one timeline, and one point of accountability. Whether you’re doing a Garage Conversion ADU in Lake Worth, adding a second story in Wellington, or building a detached ADU in Boca Raton, we bring the same material rigor and project discipline that defines every Groundwork build.
What Our Home Additions & ADU Service Includes
ADU Design & Permitting
Accessory Dwelling Units in South Florida face a maze of local zoning overlays, especially in coastal municipalities with FEMA flood zone restrictions and Florida Building Code wind-load requirements. You need this service when your property qualifies for ADU development under current Palm Beach County or city-specific ordinances, but you’re unsure how to navigate the pre-application process. At Groundwork Construction Co. of South Florida, we prepare complete permit packages including site plans, structural calculations, and utility connection diagrams, working directly with municipal planners in West Palm Beach, Delray Beach, and Boynton Beach to identify issues before they become costly change orders.
Garage Conversion ADU
Converting an existing garage into a livable unit is often the fastest path to rental income or multigenerational housing in South Florida’s tight market. This makes sense when your garage structure is sound, your lot coverage allows the conversion under current code, and you want to avoid the cost and complexity of new foundation work. We assess the existing slab for moisture intrusion (common in low-lying South Florida areas like Belle Glade and Canal Point), upgrade insulation and HVAC for year-round cooling loads, and install proper egress windows and kitchenette plumbing to meet residential code.
New Detached ADU
A standalone ADU gives you maximum design flexibility and privacy, whether positioned as a backyard rental, home office, or aging-in-place suite. This is the right choice when your lot has sufficient setback space and you’re prepared for full utility trenching and separate metering. Groundwork partners with next-generation prefab brands including Plant Prefab for clients who want accelerated timelines, while also offering traditional stick-built construction with James Hardie siding and KraftMaid cabinetry for fully custom builds that match your main residence.
Junior ADU & Interior Conversion
Junior ADU & Interior Conversion projects transform existing interior space, typically within the footprint of your primary residence, without requiring separate exterior construction. This works well for homeowners in established neighborhoods like North Palm Beach or Palm Beach Gardens where setback minimums make detached structures difficult. We reconfigure floor plans to create independent living areas with kitchenette facilities, separate entrances where code allows, and sound-rated partitions that respect privacy for both households.
ADU Site Prep & Utilities
Every ADU in South Florida requires ADU Site Prep & Utilities given our high water table, sandy soils in coastal areas, and dense limestone substrate inland. You need dedicated site work when your project involves new foundation excavation, septic system expansion or sewer connection, and electrical service upgrades. Our crews handle soil compaction testing, drainage grading to prevent the pooling that plagues properties near Lake Worth Lagoon, and coordination with Florida Power & Light for service upgrades that keep your main residence fully powered during construction.
Room Additions
Single-room additions extend your living space without the complexity of full ADU permitting, ideal for growing families who need a bedroom, home office, or expanded living area. This service fits when your foundation and roofline can accommodate the structural load, and you want to maintain architectural continuity with your existing home. We match exterior finishes precisely, whether that’s stucco, James Hardie fiber-cement siding, or impact-rated window systems that meet South Florida’s HVHZ requirements.
Second Story Additions
Adding a full second level transforms a single-story home without sacrificing yard space, a significant advantage on the smaller lots common in older Lake Worth and Delray Beach neighborhoods. This is appropriate when your existing foundation and framing can support the structural load, or when engineered reinforcement is feasible. We conduct thorough structural assessments, design stair configurations that maximize usable floor area, and install new roofing systems with GAF or CertainTeed materials that integrate seamlessly with your home’s weather protection.
Sunrooms & Enclosed Patios
Enclosed outdoor living spaces bridge South Florida’s indoor-outdoor lifestyle while adding conditioned square footage under roof. These projects suit homeowners who want year-round usability without the full cost of conventional addition construction. We use impact-rated glass and aluminum framing systems rated for our coastal wind zones, with insulated roofs that reduce cooling loads compared to traditional patio covers.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service for Home Additions & ADU
Groundwork Construction Co. of South Florida builds with Plant Prefab for clients who want factory-precision wall panels delivered to site, cutting weather delays during our summer thunderstorm season. We’ve completed multiple Plant Prefab ADU installations across Palm Beach County, and their standardized connection details integrate cleanly with our foundation and utility work. For homeowners who prefer traditional construction with premium finishes, KraftMaid cabinetry gives us consistent lead times and a range of door styles from transitional to contemporary, installed by our own finish carpenters rather than subcontracted trim crews.
James Hardie fiber-cement siding is our standard for exterior durability in South Florida’s salt-air environment, resisting the moisture infiltration that degrades wood products within seasons. We maintain current installation certifications and stock the full color palette locally, so your addition’s siding matches existing walls without the patchy fade lines that come from mismatched production lots. Whether you have Plant Prefab, KraftMaid, James Hardie, or any other make, we can help. Our 50+ brand partnerships mean you’re never locked into a single manufacturer’s limitations or pricing.
Signs You Need Home Additions & ADU Right Now
- Your family has outgrown your current square footage. Kids sharing rooms past comfort, no dedicated workspace for remote employment, or aging parents needing ground-floor access aren’t lifestyle preferences, they’re structural needs that affect daily function. In South Florida’s market, moving to a larger home triggers $30,000-$60,000 in transaction costs alone, often making an addition the smarter capital decision.
- You’re considering long-term rental income from your property. ADU rental rates in West Palm Beach and Boca Raton consistently exceed $1,500 monthly for studio units, turning underutilized yard space into revenue-producing real estate. Zoning changes in multiple Palm Beach County municipalities have relaxed ADU restrictions specifically to address housing shortages.
- Your garage or basement sits unused while you lack functional living space. South Florida homes rarely have basements, but detached garages and large utility rooms represent conversion opportunities that add value without expanding your footprint. These spaces already have roof structures and often electrical service, reducing base construction costs significantly.
- Local code changes have made ADUs newly permissible on your lot. Several South Florida cities updated zoning in 2023-2024 to allow ADUs in previously restricted single-family districts. If you’ve checked zoning in the past and been denied, current regulations may now permit what you need, but early applicants often secure more favorable interpretations before staffs tighten interpretations.
- Your home’s layout creates daily friction that remodeling alone won’t solve. Some problems, like a single bathroom for four people or no first-floor bedroom for aging-in-place planning, require additive solutions rather than reconfiguring existing space. Room additions address these fundamental mismatches between your home’s envelope and your household’s needs.
Our Home Additions & ADU Process - Step by Step
- 1
Property Assessment & Zoning Review. We visit your South Florida property to document existing conditions, measure setbacks, and verify your lot’s ADU eligibility under current municipal code. This includes preliminary flood zone verification and HOA covenant review where applicable, so we don’t waste your time on designs that can’t be permitted.
- 2
Design Development & Material Selection. Raymond Estevez works with you to develop floor plans that match your functional needs and aesthetic preferences, selecting from our 50+ brand partnerships including KraftMaid for kitchens and James Hardie for exterior finishes. You’ll see material samples and firm pricing before any permitting begins, not after.
- 3
Permit Submission & Plan Review. Our team prepares complete construction documents and submits to the appropriate South Florida building department, tracking plan review comments and responding to examiner requests without involving you in bureaucratic back-and-forth. We know the specific requirements of Palm Beach County, West Palm Beach, and surrounding municipalities from repeated project experience.
- 4
Construction & Quality Verification. Groundwork’s crew executes foundation, framing, roofing, mechanical, and finish work under direct supervision, with progress inspections at structural, rough-in, and final phases. We don’t subcontract critical trades to unknown crews; our foremen know your project timeline and specifications personally.
- 5
Final Inspection & Project Closeout. We coordinate all required municipal inspections, obtain certificate of occupancy, and conduct a detailed walkthrough with you to confirm every specification is met. Your warranty documentation and maintenance guidance are delivered in writing, with our team available for any post-occupancy questions.
How Much Does Home Additions & ADU Cost in South Florida?
A typical room addition in South Florida runs $45,000-$130,000 depending on size, foundation type, and finish level, while full ADU construction ranges from $90,000-$220,000 and garage conversions fall between $30,000-$80,000. These figures reflect our current market for permitted, inspected work with licensed trades, not unpermitted backyard builds that expose you to code enforcement and resale complications.
Several factors move your project within these ranges. Coastal properties in Boca Raton or Delray Beach often require impact-rated glazing and enhanced wind connections that add $8,000-$15,000 compared to inland builds. Site conditions matter: properties with poor drainage access, buried utility conflicts, or mature tree preservation requirements need additional engineering and protection measures. Interior finish selections create the widest variance, a basic Tuff Shed studio shell costs far less than a Plant Prefab unit with KraftMaid cabinetry and stone countertops.
To avoid overpaying, get your zoning confirmation in writing before paying for design work, and demand itemized proposals that separate structural, mechanical, and finish costs so you can value-engineer without starting over. Our free estimates include exactly this breakdown, with no deposit required to receive firm numbers. Call (844) 665-0162 for an exact quote on your specific property.
Home Additions & ADU Near South Florida - Our Service Area
Groundwork Construction Co. of South Florida builds across Palm Beach County and surrounding communities, with typical initial site visits scheduled within 48-72 hours for properties in Home Additions & ADU in West Palm Beach, Home Additions & ADU in North Palm Beach, and Home Additions & ADU in Palm Beach Gardens. We also serve Wellington, Boynton Beach, Boca Raton, Belle Glade, Canal Point, Bryant, Clewiston, Delray Beach, and Lake Worth. Response times extend slightly for western communities like Belle Glade and Clewiston given travel distance, but we maintain the same permitting expertise for properties in Palm Beach County’s unincorporated areas and smaller municipalities with less frequent construction activity.
Serving South Florida, FL - Our Local Coverage Area
We’re based in the South Florida 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 South Florida
An ADU (Accessory Dwelling Unit) is a complete independent living space with kitchen, bathroom, and sleeping facilities, either attached to or detached from your main residence. A room addition expands your existing home without creating a separate dwelling unit. Groundwork Construction Co. of South Florida designs and builds both, helping you choose based on your zoning, budget, and whether you need rental income or simply more living space.
Room additions generally take 3-5 months from permit to completion, while detached ADUs run 4-8 months depending on municipality plan review times and utility connection schedules. Prefab options through Plant Prefab can compress the construction phase by 30-50% compared to stick-built methods. Call (844) 665-0162 to discuss your target timeline and which approach fits your schedule.
ADU construction in South Florida typically costs $90,000-$220,000, while room additions run $45,000-$130,000. The ADU premium reflects full kitchen and bathroom infrastructure, separate utility metering where required, and additional permitting complexity. Our free estimates break out these costs specifically so you understand where your investment goes.
Yes, Groundwork is an experienced installer for Plant Prefab units and can also source from Dvele, Mighty Buildings, Boxabl, and other prefab partners. We handle site preparation, foundation, utility connections, and final finish work that factory delivery doesn’t include. Call (844) 665-0162 to compare prefab timeline and cost against traditional construction for your specific project.
While home additions aren’t emergency services, we maintain crew availability to address unexpected conditions like termite damage, failing foundations, or concealed structural deficiencies that discovery during demolition. Our full-scope capability means we don’t pause your project waiting for a separate contractor to address these issues. Contact us immediately if your current project has uncovered problems.
Groundwork Construction Co. of South Florida provides written workmanship warranties on all construction, supplemented by manufacturer warranties on materials from brands like James Hardie, KraftMaid, and GAF. Specific warranty terms are detailed in your construction agreement before work begins, so you know exactly what’s covered and for how long.
Gather your property survey, any existing floor plans, and your HOA’s architectural guidelines if applicable. Mark or note any underground utilities, irrigation systems, or landscape features you want preserved. The more information you bring to our first meeting, the more precise our initial feasibility assessment and budget range will be. Call (844) 665-0162 to schedule your free consultation with Raymond Estevez.
Schedule Your Home Additions & ADU Service in South Florida Today
Call (844) 665-0162 now to speak with Raymond Estevez about expanding your South Florida home. We’ll schedule a free site visit, confirm your zoning and feasibility, and deliver a detailed estimate with real numbers, not ballpark guesses. Every project starts with clarity and ends with a build you can trust, from foundation to finish.
Written by Raymond Estevez, Owner at Groundwork Construction Co., serving South Florida since our founding.