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 Boynton Beach
Home additions and ADU construction in Boynton Beach typically run $45,000-$130,000 for room additions and $90,000-$220,000 for detached ADUs, with most projects requiring Palm Beach County Building Division permits and impact-rated openings under Florida’s wind-borne debris code. We’re Rowan Construction Group, and our crews work Boynton Beach regularly - from Leisureville’s 1960s CBS villas to the newer master-planned communities west of Congress Avenue. Dispatch and scheduling run through our South Florida office, with local crews carrying the documented photo record, written scope, and signed pricing that Haven Standard projects require. Call (754) 254-8065 to schedule your free estimate.
Why Rowan Construction Group Boca Raton Is Boynton Beach’s Preferred Home Additions & ADU Company
We’ve delivered projects across Boynton Beach’s distinct housing zones - the pre-Andrew CBS stock east of Congress Avenue and the drainage-sensitive developments to the west - and that local familiarity shows up in our quotes. A Leisureville villa built in 1972 carries different structural considerations than a 1995 home in Canyon Isles, and we price those differences honestly rather than padding a single blanket number.
Our Boynton Beach customers leave reviews that mention the same thing: the written price held. That’s Clause 1 of the Haven Standard - the price is written before anyone starts - and it’s why our projects finish within a few percent of the agreed cost across 4,000-plus jobs since 2007. We don’t ask you to trust a handshake; we ask you to read the scope.
Response time to Boynton Beach is same-week for estimates, with a live person answering calls 24/7. Our crews are background-checked, uniformed, and arrive with a documented photo record as standard - not an upgrade you pay extra for.
Grant Rowan built this discipline. The Haven Standard requires signed change orders before any added work proceeds, and that administrative rigor is what keeps budgets intact on Boynton Beach additions where water table issues or structural reviews add unexpected scope.
Our Home Additions & ADU Services in Boynton Beach
Junior ADU & Interior Conversion
In Boynton Beach’s 55-plus communities, the most practical aging-in-place solution is often working inside the existing footprint. A Junior ADU converts part of the primary residence - typically a ground-floor bedroom suite or attached living area - into a self-contained unit with its own kitchenette and bathroom. In Leisureville and similar 1960s-1980s CBS developments, we regularly encounter 32-inch bathroom doorways and raised shower thresholds that don’t meet current accessibility needs. Widening that door frame to 36 inches and pouring a zero-threshold shower pan usually triggers a Palm Beach County Building Division permit and inspection sign-off, whereas swapping a tub for a curbless shower without moving walls can often proceed as a remodel. We write both scenarios into separate line items so you can compare the permitted and unpermitted paths honestly.
ADU Design & Permitting
Detached ADUs in Boynton Beach face a specific code stack: Florida Building Code wind-borne debris requirements for impact-rated openings or compliant shutters, plus Palm Beach County zoning setbacks that vary by whether you’re east or west of Federal Highway. Our Home Additions & ADU team handles the full permit package - structural drawings, MEP plans, and site drainage engineering - because west-of-Congress properties often need engineered slab designs for the high water table. Under Clause 1, the permit costs and engineering fees are written into your price before we file, not discovered mid-project.
Garage Conversion ADU
Converting a garage to an ADU in Boynton Beach runs $30,000-$80,000, but the number depends heavily on whether the existing slab can support residential occupancy and how the roof ties into the main structure. Many 1970s-era garages in Boynton Beach retirement communities have flat or low-slope roofs built with wood decking over steel bar joists - a combination that fails modern load calculations and almost always requires structural engineering review before the Palm Beach County Building Division will approve the conversion. We flag this in our initial walkthrough and write the engineering contingency into the scope, not into a surprise change order later.
Room Additions
Single-story room additions on Boynton Beach’s CBS homes require careful attention to the existing roof-to-wall connections, which in pre-Andrew construction often lack the metal straps and clips that current hurricane codes demand. Adding square footage means tying new structure to old, and that intersection is where we find the most hidden conditions. Our documented photo record captures the existing connection detail before demolition, so you see what we’re working with and why the structural upgrade is necessary. A typical Boynton Beach room addition runs $45,000-$130,000 depending on square footage, finish level, and whether we’re matching existing single-pane aluminum windows or upgrading to impact-rated units.
New Detached ADU
For homeowners with adequate lot depth, a new detached ADU offers the most flexibility - and the most complex permitting path. Boynton Beach’s salt-laden coastal air means we specify GAF or CertainTeed roofing systems with corrosion-resistant fasteners, and we engineer foundations for the local water table. The Haven Standard requires that every allowance, from septic tie-in to impact window specification, appears in the written price before we break ground.
ADU Site Prep & Utilities
Site prep in Boynton Beach often means dealing with fill soil from former agricultural land west of Congress Avenue, where undocumented debris and high water tables complicate excavation. We bring in geotechnical recommendations when the county requires them, and we write that cost into the initial quote - not as a contingency you discover after signing.
Sunrooms & Enclosed Patios
Enclosing an existing patio in Boynton Beach sounds simple until you hit the code requirement for impact-rated openings and the structural question of whether the existing slab was poured to enclosed-space standards. We check both before quoting.
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.
Before
AfterTrusted Brands We Service in Boynton Beach
We source across fifty-plus vetted brands so our written quotes carry honest numbers rather than inflated ones. For Boynton Beach additions and ADUs, that means Kohler valves and Grohe fixtures specified for coastal corrosion resistance, GAF roofing systems with enhanced nail-zone engineering for high-wind zones, and impact-rated window packages from manufacturers who’ve passed Florida Product Approval testing. We don’t stock every part in a local warehouse - that would require marking up inventory carrying costs - but our supply relationships with regional distributors mean turnaround on standard items is typically 3-5 business days, not weeks. When a Leisureville homeowner needs a specific grab-bar blocking pattern or a CertainTeed siding match for a 1978 stucco texture, we source it without the “special order” surcharge some contractors layer on.
Common Home Additions & ADU Problems We See in Boynton Beach Homes
- Assuming a zero-threshold shower or wider doorway is a simple swap. The original slab and framing in 1960s-80s CBS Leisureville villas often need rough-in plumbing relocation and structural blocking that require a permitted alteration and Palm Beach County Building Division review. We price both the cosmetic and the structural paths so you choose with full information.
- Specifying standard steel fasteners and flashing within salt-laden coastal air. Boynton Beach’s proximity to the Atlantic accelerates corrosion on metal connectors, flashing, and exterior trim. We specify stainless or hot-dip galvanized hardware as standard on coastal-exposure additions - not as an upgrade, but as the correct material for the environment.
- Budgeting garage conversion ADUs or room additions west of Congress without drainage engineering. The high water table on former agricultural land complicates slab-on-grade work and requires engineered drainage that adds scope before the first inspection. We identify this in our site evaluation and write it into the price.
- Ignoring the structural engineering trigger on 1970s-era flat roofs. Wood decking over steel bar joists - common in Boynton Beach retirement community clubhouses and attached villas - fails modern load calculations and requires engineering review before re-roof or addition tie-in. We flag this condition during walkthrough and include the engineering allowance in our written quote.
Pricing for Home Additions & ADU in Boynton Beach, FL
Here’s what we’re seeing in the Boynton Beach market for 2024-2025. These are flat-price ranges with written scope, not estimates that shift once work starts.
| Project Type | Price Range in Boynton Beach |
|---|---|
| Walk-In Shower Installation | $4,500-$12,000 |
| Tub-to-Shower Conversion | $3,500-$10,000 |
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
| Impact Window Installation | $8,000-$25,000 |
What moves the number? Foundation conditions on west-of-Congress properties, structural engineering requirements on pre-Andrew CBS structures, impact-rated opening upgrades triggered by Florida’s wind-borne debris zone, and finish selections from our fifty-plus brand catalog. Every allowance is itemized in writing before you sign. No work proceeds on a change until the change order is signed - that’s the discipline that has kept our projects within a few percent of the agreed price since 2007. Call (754) 254-8065 for your free estimate; we’ll review your existing conditions and deliver a written quote you can compare line by line.
We Also Serve Cities Near Boynton Beach
Our crews work throughout southern Palm Beach and northern Broward counties, including Home Additions & ADU in Boynton Beach and neighboring Delray Beach, Boca Raton, Deerfield Beach, and Coconut Creek. Each city carries its own code interpretations and housing stock patterns; we price accordingly rather than applying a regional average.
Serving Boynton Beach, FL - Our Local Coverage Area
We’re based in the Boynton 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.
FAQs - Home Additions & ADU in Boynton Beach
Yes, often - but the path depends on whether you’re moving walls or working within them. Swapping a tub for a curbless shower without relocating plumbing or widening the door frame can typically proceed as a remodel; widening a 32-inch doorway to 36 inches and pouring a zero-threshold pan usually requires a Palm Beach County Building Division permit because it alters the structural opening and may affect fire-rated assemblies. We evaluate both paths during our free estimate and write separate prices so you can decide. Call (754) 254-8065 to schedule a walkthrough.
Yes. Any permitted living space in Boynton Beach’s wind-borne debris region must have impact-resistant openings or a compliant shutter system - the code doesn’t distinguish between new construction and conversion. We specify GAF or CertainTeed roofing with Florida Product Approval and impact-rated windows or doors as standard in our garage conversion quotes, not as optional add-ons. The permit package includes wind-load calculations and opening documentation for Palm Beach County sign-off. Call (754) 254-8065 for a written quote with full code compliance included.
Many 1970s-era structures in Boynton Beach’s retirement communities were built with wood decking over steel bar joists for flat or low-slope roofs - a combination that doesn’t meet current load calculations for live loads, wind uplift, or the additional weight of modern roofing materials. Palm Beach County Building Division requires engineering review when the existing structure can’t demonstrate compliance. We identify this condition during our initial photo-documented walkthrough and include the engineering allowance in our written price, not as a mid-project surprise. Call (754) 254-8065 to discuss your specific structure.
We structure the build schedule around your calendar, with milestone-based payments tied to documented progress - foundation, framing, rough-in, finish - rather than calendar dates that don’t match your presence. Our photo record is uploaded to a shared folder after every visit, so you review progress remotely, and we schedule Palm Beach County inspections to align with your return. The Haven Standard’s 365-Day Done Right Promise runs from substantial completion, not from your occupancy, so coverage remains intact even if you’re away for months. Call (754) 254-8065 to discuss timing that works with your seasonal schedule.
A room addition in Boynton Beach typically runs $45,000-$130,000, while a garage conversion ADU runs $30,000-$80,000 and a new detached ADU runs $90,000-$220,000. For aging-in-place needs, the garage conversion often delivers the most function per dollar - adding independent living space without the foundation and utility extension costs of a detached unit. However, if the existing garage has a 1970s flat roof over steel bar joists, the structural engineering and re-roofing can push the number toward the upper end. We evaluate your specific structure and write both the addition and conversion paths so you can compare actual numbers, not hypotheticals. Call (754) 254-8065 for your free estimate.
Ready to see your options in writing? Call (754) 254-8065 to schedule your free estimate. We’ll walk your Boynton Beach property, document existing conditions with photos you keep, and deliver a flat written price with itemized scope - before anyone picks up a tool. That’s Clause 1 of the Haven Standard, and it’s how we’ve worked since 2007.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Boynton Beach since 2007.