Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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Before
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Before
AfterTrusted Home Additions & ADU for Boca Raton Homeowners
Most Boca Raton families who call us bought their homes between 2015 and 2022, paid a premium for the location, and now need space that matches what they paid for, not what the original builder included. Our Home Additions & ADU in Boca Raton typically cost $45,000-$130,000 for room additions and $90,000-$220,000 for detached ADU construction, with permits, site prep, and utility tie-ins included in the written scope. We’ve delivered over 4,000 projects since 2007, every one with a flat written price before work started and a documented photo record when the crew left. Call (754) 254-8065 to schedule your free estimate.
The Haven Standard, which Rowan Construction Group operates under, was built on one administrative discipline: no work proceeds on a change until the change order is signed. That discipline is why our projects finish within a few percent of the number the customer agreed to. In Boca Raton, where Palm Beach County permitting can add six to ten weeks to a timeline, that predictability matters. We’ve worked through the county’s online permitting portal since 2019 and know which plans examiners flag roof tie-in details versus which ones focus on egress window sizing.
What Our Home Additions & ADU Service Includes
ADU Design & Permitting
An accessory dwelling unit, or ADU, is a self-contained living space on the same lot as a primary residence, and in Boca Raton it can be attached, detached, or converted from existing space like a garage. You need this service when you want rental income, multigenerational housing, or to increase property value without buying new land. For Deerfield Beach Home Additions & ADU and Boca Raton projects alike, we produce architectural plans, structural calculations, and energy compliance documentation in-house, then shepherd the package through Palm Beach County’s Building Division, because we’ve learned that incomplete MEP (mechanical, electrical, plumbing) riser diagrams are the most common reason plans get rejected on first review.
Garage Conversion ADU
A garage conversion ADU transforms an existing attached or detached garage into a permitted living space with kitchen, bath, and independent climate control, which in Boca Raton’s market often returns $1,200-$2,400 monthly in rental income. You need this when your garage sits empty, your lot won’t accommodate new construction, or you want the fastest path to a permitted ADU. We assess the slab thickness, ceiling height, and existing electrical panel capacity before quoting, because a 100-amp service common in 1980s Boca Raton homes usually requires an upgrade to 200 amps, and we put that number in writing before anyone picks up a tool.
New Detached ADU
A new detached ADU is a standalone structure, typically 400-1,200 square feet, built from foundation to finish on your property, and in Boca Raton it’s subject to the same Florida Building Code standards as the primary residence, including impact-rated windows if you’re east of I-95. You need this when you want maximum privacy for tenants or family members, or when your garage is unsuitable for conversion. We handle site prep including soil compaction testing, utility trenching from the main house, and Florida Power & Light coordination for separate metering, because we’ve found that FPL’s residential new service timeline in Boca Raton runs four to six weeks and must be sequenced before drywall.
Junior ADU & Interior Conversion
A junior ADU, or JADU, is a smaller unit created within the existing footprint of the primary residence, typically 150-500 square feet, with a kitchenette and separate entrance but sharing bathroom facilities with the main house. You need this when you want minimal construction disruption, have limited exterior space, or need to house a family member quickly. We identify load-bearing walls with structural review, design sound-attenuation between units, and ensure the JADU meets Florida’s fire separation requirements, because in Boca Raton’s older Spanish Mission and ranch-style homes, the original floor plans rarely accommodate easy division without header beams.
ADU Site Prep & Utilities
ADU site prep and utilities covers everything below the finished floor: grading, drainage, sewer and water lateral extensions, electrical service upgrades, and gas line routing if applicable. You need this as a standalone service when you’ve hired an architect separately or when your general contractor discovered unexpected conditions mid-project. We use laser level survey equipment to confirm positive drainage away from both structures, because Boca Raton’s flat topography and seasonal heavy rainfall, 60-plus inches annually, make French drain installation a frequent necessity that other contractors miss until the first storm.
Room Additions
A room addition expands the conditioned living space of your primary residence, whether that’s a master suite, home office, or expanded family room, and for Home Additions & ADU in Delray Beach or Boca Raton it requires matching the existing roofline or designing a complementary architectural transition. You need this when your family has outgrown the floor plan but you don’t want to leave your neighborhood or absorb a new mortgage at current rates. We analyze the existing foundation capacity, design matching soffit and fascia details, and specify impact-rated windows consistent with your current openings, because Palm Beach County inspectors will flag mismatched exterior finishes during the final inspection.
Second Story Additions
A second story addition doubles or significantly increases your living area by building upward, which in Boca Raton requires structural verification that your existing foundation and first-floor walls can carry the new load. You need this when your lot coverage is already at maximum under zoning, or when you want to preserve your yard and outdoor living space. We engage a structural engineer for load path analysis, specify LVL or steel beams as needed, and coordinate crane rental for material hoisting, because in Boca Raton’s gated communities like Royal Palm Yacht & Country Club or Boca West, crane placement and street closure permits add a week to the schedule that must be built into the timeline we give you.
Sunrooms & Enclosed Patios
A sunroom or enclosed patio converts an open outdoor space into a glass-walled, climate-controlled room, which in Coconut Creek Home Additions & ADU and Boca Raton’s climate extends usable square footage year-round without the full cost of conventional construction. You need this when you want to preserve views of your landscaping, need a transitional space between indoors and pool deck, or want to enclose an existing lanai. We specify insulated glass with low-E coating and thermally broken aluminum framing, because uninsulated enclosures in Boca Raton’s humidity and salt air become unusable six months of the year and develop condensation-related mold within two to three years.
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
We’ve specified and installed prefabricated ADU components from Abodu for clients in Boca Raton who wanted factory-built precision with faster site assembly, and we’ve learned their panelized wall system’s connection details well enough to coordinate crane-set day with their shipping schedule, typically a four-hour window that can’t slip. For customers interested in fully modular construction, Dvele units require precise foundation tolerance, within one-eighth inch across the full footprint, and we’ve developed a concrete forming checklist specific to their specifications after completing installations in Palm Beach County. Mighty Buildings and their 3D-printed composite panels present unique fastening and finishing requirements that our crews have trained on, including their proprietary corner trim and window buck details that differ from conventional wood framing.
Whether you have an Abodu, Dvele, Mighty Buildings, or any other make, we can help. Our written quotes include brand-specific material costs pulled from our fifty-plus vetted supplier relationships, not placeholder allowances that inflate later. If you’re comparing a prefabricated unit against site-built construction, we’ll produce both quotes line by line so you can see where the numbers diverge.
Before
AfterSigns You Need Home Additions & ADU Right Now
- Your adult children have moved back, or your parents need to. Multigenerational household formation in Boca Raton has increased 34% since 2019, and the existing bedroom count in homes built before 2010 rarely accommodates this shift without conflict over bathroom schedules and privacy. An ADU or room addition restores functional separation without the emotional and financial cost of separate residences.
- You’re working from home permanently without a dedicated office. The kitchen table was a temporary solution in 2020; five years later, it’s destroying your productivity and your resale value, because Boca Raton buyers now expect home office space as standard. A dedicated addition with proper acoustic separation and hardwired ethernet pays for itself in focus and in listing price.
- Your garage has become unparkable storage. When a two-car garage holds no cars, you’ve effectively paid for square footage you can’t use, and in Boca Raton’s sun and salt environment, parking outside accelerates vehicle deterioration. A garage conversion ADU reclaims that space for income or family while solving the parking problem through redesigned driveway flow.
- Your property’s zoning changed to allow ADUs. Boca Raton’s 2023 zoning overlay in certain neighborhoods permitted ADUs where they were previously barred, and the window for grandfathered approvals under relaxed setback rules may not last. Acting now, while the ordinance is favorable, can save twelve to eighteen months of future entitlement work.
- Your home’s value has appreciated beyond your comfort zone for trading up. If you bought in Boca Raton for $650,000 and comparable homes with your target square footage now list at $1.2 million, the $100,000-$150,000 addition cost creates the space you need without the $550,000 gap, transfer taxes, and new mortgage rate exposure.
Our Home Additions & ADU Process - Step by Step
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On-site assessment and written scope. We visit your Boca Raton property, measure existing conditions, photograph the structure and site, and discuss your goals and budget range. Within five business days, you receive a written price with line-item breakdown, a proposed timeline, and a description of the documentation you’ll receive at each phase. Under Clause 1 of The Haven Standard, this price is fixed before any work starts.
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Design development and permitting. For projects requiring architectural plans, we produce or coordinate drawings, structural calculations, and MEP layouts, then submit to Palm Beach County Building Division. We track plans examiner comments daily and revise within 48 hours of any rejection, because we’ve found that rapid response cycles shave two to three weeks off total permit time compared to contractors who check weekly.
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Pre-construction meeting and change order protocol. Before breaking ground, we review the written scope with you in person, confirm material selections from our fifty-plus vetted brands, and explain the change order process: no work proceeds on a change until the change order is signed. This is the administrative discipline Haven acquired Rowan for, and it’s printed on every contract.
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Construction with documented photo record. Our background-checked, uniformed crew works on your project with a dedicated project manager who uploads dated, geotagged photos to your customer portal after every visit. You see footing depth, rebar placement, rough-in inspections, and finish work as it happens, included as standard, not an upgrade.
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Final inspection, walkthrough, and warranty delivery. We pass all required inspections, conduct a punch-list walkthrough with you present, and deliver your written warranty documentation. The 365-Day Done Right Promise begins at substantial completion: if it is not done right, Rowan makes it right, backed by The Haven Standard, not a handshake.
How Much Does Home Additions & ADU Cost in Boca Raton?
A typical room addition in Boca Raton runs $45,000-$130,000 depending on square footage, foundation type, and finish level. ADU construction costs more, $90,000-$220,000 for detached units, because you’re building a complete independent dwelling with kitchen, bath, and separate utility services. Garage conversions fall between, typically $30,000-$80,000, with the wide range driven by whether the existing slab and electrical service can be adapted or must be replaced entirely.
Several factors move the needle within these ranges. Roof tie-in complexity: matching a 1980s concrete tile roof in Hidden Lake or Woodfield Country Club requires sourcing discontinued profiles or replacing the entire roof plane, which adds $8,000-$15,000. Soil conditions: Boca Raton’s variable fill depth over the original Everglades muck can require deeper footings or helical piers, adding $3,000-$7,000. Utility distance: running new sewer and water laterals 80 feet to a rear-lot ADU in Boca Raton’s larger estate properties costs more than a 20-foot run in a standard subdivision. Impact window specification: moving from basic impact-rated vinyl to aluminum-clad wood with custom divided lites can double the window package cost.
To avoid overpaying, get three written quotes and bring them to us for a Free Second Opinion on Any Written Estimate. We’ll review line by line at no charge, flagging where allowances are inflated, where scope is omitted, and where material specs don’t match what was described. Our quotes are flat prices with written scope and written warranty; “call for a quote” is not an option here.
Your free estimate includes: site measurement and photography, preliminary code and zoning review, a written price with material allowances named by brand or grade, a proposed timeline with permit and construction phases separated, and a description of the documented photo record you’ll receive. Call (754) 254-8065 to schedule.
Home Additions & ADU Near Boca Raton - Our Service Area
We build home additions and ADUs throughout Palm Beach and northern Broward counties, including Home Additions & ADU in Deerfield Beach, Home Additions & ADU in Delray Beach, and regularly in Lighthouse Point, Coconut Creek, Pompano Beach, Parkland, Margate, Boynton Beach, Coral Springs, Lauderdale-by-the-Sea, and North Lauderdale. Typical drive time to a Boca Raton site from our dispatch is under 30 minutes; for Deerfield Beach and Delray Beach, under 20. We schedule on-site assessments within three business days of your call, and permitting coordination begins the same day you approve the written quote.
Serving Boca Raton, FL - Our Local Coverage Area
We’re based in the Boca Raton 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 Boca Raton
A home addition expands your existing residence with new conditioned space, while an ADU, or accessory dwelling unit, is a separate living quarters on the same property. You need one when your household has outgrown your current square footage, you want rental income, or you need separate living space for family members without buying a new property. In Boca Raton’s market, where median home prices have risen 40% since 2020, adding space is often more financially rational than trading up.
A typical room addition takes four to six months from permit approval to final inspection, while a detached ADU runs eight to fourteen months due to additional utility coordination and separate metering requirements. Palm Beach County’s permit timeline adds six to ten weeks for residential additions, and we build that into our proposed schedule before you sign. Call (754) 254-8065 for a timeline specific to your property - estimates are free.
Room additions in Boca Raton cost $45,000-$130,000, garage conversion ADUs run $30,000-$80,000, and new detached ADUs range $90,000-$220,000 depending on size, finish level, and site conditions. Every quote we provide is a flat written price with line-item breakdown before any work starts, because Clause 1 of The Haven Standard requires it. Call (754) 254-8065 for an exact quote - estimates are free.
Yes, we’ve installed and specified Abodu, Dvele, and Mighty Buildings units in Palm Beach County, and we maintain current training and supplier relationships for each. Our written quotes include brand-specific material costs, not inflated allowances, and we coordinate factory delivery schedules with our site preparation timeline. Whether you have one of these brands or any other make, we can help.
We do not perform emergency response for home additions or ADU construction, as these are planned projects with engineered schedules, not sudden failures requiring immediate dispatch. If you discover termite damage, rot, or foundation issues during demolition, we document with photography, issue a signed change order with the repair scope and price, and proceed only after your signature - no work on a change proceeds without that signed document. For genuine emergencies like roof collapse or structural failure, we can refer you to appropriate specialists.
We offer the 365-Day Done Right Promise: if it is not done right, Rowan makes it right, backed by The Haven Standard with terms printed on every page, not an asterisk. This covers workmanship and material installation for one year from substantial completion, and we respond to warranty calls with the same photo documentation standard as the original construction. The guarantee is transferable if you sell within the warranty period, which in Boca Raton’s active market is a meaningful resale feature.
Gather your property survey, any existing architectural plans, and a written description of your goals and budget range; this lets us produce a more precise first quote. Clear personal items from the work area and identify any access constraints, like gated community entry protocols or HOA notification requirements, which in Boca Raton communities like Broken Sound or St. Andrews Country Club can affect crew scheduling. Call (754) 254-8065 to schedule your free estimate - we’ll tell you exactly what to prepare based on your specific project type.
Schedule Your Home Additions & ADU Service in Boca Raton Today
Call (754) 254-8065 to schedule your free estimate. A live person answers calls 24/7, and we’ll have a project manager on your Boca Raton property within three business days. You’ll receive a flat written price with line-item scope before any work starts, every time, backed by The Haven Standard and our 365-Day Done Right Promise. No obligation, no pressure, no “call for a quote.”
Written by Grant Rowan, Owner at Rowan Construction Group, serving Boca Raton since 2007.