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
AfterFast, Reliable Home Additions & ADU Across Lighthouse Point
Home additions and ADU construction in Lighthouse Point, FL typically run $45,000-$130,000 for room additions and $90,000-$220,000 for detached ADUs, with most projects requiring engineered foundations due to the city’s dredged-fill soil conditions. We’re Rowan Construction Group, and our crews serve Lighthouse Point from our South Florida coordination office, bringing marine-aware construction practices to every canal-grid lot we build on. Call (754) 254-8065 to schedule your free estimate - we’ll put a written price in your hands before anyone picks up a tool.
Why Rowan Construction Group Boca Raton Is Lighthouse Point’s Preferred Home Additions & ADU Company
We’ve delivered written-price projects across Lighthouse Point’s 1950s-60s canal-grid neighborhoods, from the waterfront blocks off NE 26th Avenue to the interior streets near Dan Witt Park. Our local reputation rests on documentation: a photo record from every site visit, change orders signed before any extra work proceeds, and final costs that land within a few percent of the original quote - the discipline that’s kept 4,000-plus projects on budget since 2007.
Homeowners in Lighthouse Point find us the same way they research appliances: they read the three-star reviews, then call to see if we’ll name a price range on the phone. We will. Our Home Additions & ADU team answers calls through a live person 24/7, and our background-checked, uniformed crews arrive with the spec sheets and material samples for fifty-plus vetted brands - from Belgard hardscaping to KraftMaid cabinetry - so the written quote reflects honest numbers, not inflated allowances.
Dispatch and scheduling for Lighthouse Point projects are coordinated from our Miami office, with crews assigned to Broward County’s High-Velocity Hurricane Zone builds specifically. That matters here. Lighthouse Point’s HVHZ status means every structural connection, opening protection, and roofing system must meet the most stringent wind-load requirements in the United States - a permitting complexity that contractors unfamiliar with marine-adjacent South Florida routinely underestimate.
Our Home Additions & ADU Services in Lighthouse Point
ADU Design & Permitting
Every Lighthouse Point ADU starts with a soil and footing assessment, not a visual walk-through. The city’s dredged-fill lots - created by piling canal spoil during the 1950s build-out - sit on high water tables with low bearing capacity, so our engineering calls for deeper, wider footings than the same unit would need on native soil just blocks west in unincorporated Broward. We handle the dual-permitting reality: city plans review for zoning compliance, plus Broward County health department sign-off on septic and well setbacks, and HVHZ structural specifications that add material cost and inspection phases. A typical Lighthouse Point ADU permitting package runs 8-14 weeks; we build that timeline into the written quote so your draw schedule isn’t surprised by county queue times.
Garage Conversion ADU
Garage conversions in Lighthouse Point run $30,000-$80,000 and present a specific challenge: most original garages in this 1950s-70s housing stock were built with slab-on-grade floors that lack the depth and reinforcement for residential occupancy loads. We pull exploratory cores to check for adequate thickness and vapor barriers before quoting. The block walls also need examination - salt intrusion through decades of marine exposure often shows as concrete spalling and compromised rebar that must be remediated before insulation and finishes go in. Our written scope spells out exactly what we found, what it means, and what it costs to fix, with photos from the initial site visit included as standard documentation.
New Detached ADU
New detached ADUs are where Lighthouse Point’s marine conditions hit hardest. On a canal-front block off NE 26th Avenue, we framed a detached ADU for a homeowner and hit fill soil that wouldn’t support the footing depth on the approved plans; we brought in a geotech and an engineer, revised the foundation to a thickened-edge slab with deeper grade beams, and documented the change order in writing before pouring. The same job also had us spec stainless fasteners and hot-dip-galvanized connectors throughout because the salt-air exposure off the Intracoastal eats standard hardware, and the final inspection sign-off cleared with no rework. This is standard practice for us on Lighthouse Point waterfront and near-waterfront lots - not an upgrade, not a surprise, just built into the written price from the start.
Junior ADU & Interior Conversion
Junior ADUs and interior conversions in Lighthouse Point work within the existing concrete block envelope, but that envelope needs honest assessment. These homes predate modern Florida Building Code hurricane standards, and we’ve found undersized tie-beam systems that require structural remediation before any wall removal or reconfiguration. The 365-Day Done Right Promise applies here as everywhere: if the inspection reveals something the initial scope didn’t capture, we document it, price it, and get your signature before proceeding - Clause 1 of the Haven Standard is the whole point. No work proceeds on a change until the change order is signed.
ADU Site Prep & Utilities
Site prep on Lighthouse Point’s open lots means navigating tight equipment access between canal seawalls and existing structures, then dealing with the shallow water table that complicates excavation for utilities. Long material hauls from staging areas to the build site can push the draw schedule when the subfloor, shell, and rough-in phases stack up - we scope this explicitly in the written quote, with contingency allowances tied to documented site conditions, not guesswork. Septic and well setback review through Broward County adds a parallel permitting track that city-only contractors sometimes miss entirely.
Room Additions
Room additions in Lighthouse Point face the same footing reality as ADUs: the dredged-fill substrate routinely requires engineered solutions that wouldn’t be necessary on native soil. We quote these only after a geotechnical assessment, because we’ve seen too many projects start with a visual walk-through number, then discover the foundation needs revision once the shovel hits the fill. The written price you receive from us includes that assessment, the engineered drawings, and the revised footing spec - or it includes the contingency allowance with a clear trigger condition. Either way, you know 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.
Before
AfterTrusted Brands We Service in Lighthouse Point
We source across fifty-plus vetted brands, and for Lighthouse Point’s marine-adjacent conditions we specify accordingly: Belgard and Techo-Bloc pavers for hardscaping that resists salt degradation, hot-dip-galvanized and stainless fasteners from Simpson Strong-Tie for structural connections, and Owens Corning or GAF roofing systems rated for HVHZ wind loads. We stock common Lighthouse Point replacement items - hurricane-rated window and door hardware, compatible block and mortar for 1950s-70s construction, corrosion-resistant lintels - so material delays don’t push your schedule. Every brand is named in the written quote with model numbers where relevant, because a quote you can screenshot and compare is a quote you can trust.
Common Home Additions & ADU Problems We See in Lighthouse Point Homes
- Engineered foundations required on “simple” additions. The dredged-fill soil beneath most Lighthouse Point lots has low bearing capacity and a high water table, meaning even a single-room addition often needs deeper footings or grade beams that a visual estimate would never capture. We find this during pre-quote geotechnical work, not after the foundation is poured.
- Salt-air corrosion of standard hardware. Prevailing onshore winds off the Intracoastal accelerate corrosion of fasteners, lintels, and embedded rebar far faster than in inland Pompano Beach. We spec stainless and hot-dip-galvanized materials as baseline on marine-adjacent lots, not as upgrades.
- Dual-permitting complexity. Lighthouse Point additions and ADUs often trigger both city zoning review and Broward County health department septic/well setback review, plus HVHZ structural requirements. Contractors who treat this as city-only permitting find themselves mid-project with unapproved county phases.
- Concrete spalling and compromised rebar in original block walls. Decades of salt intrusion through the porous block common to 1950s-70s Lighthouse Point construction leave walls that look sound but won’t support new loads or anchor new connections without remediation.
Pricing for Home Additions & ADU in Lighthouse Point, FL
| Service | Price Range in Lighthouse Point |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
These ranges reflect the marine-adjacent conditions that define Lighthouse Point construction: engineered foundations for dredged-fill soils, HVHZ-rated materials and connections, stainless or hot-dip-galvanized hardware for salt-air exposure, and dual-permitting coordination that adds administrative cost but prevents mid-project stops. What moves a project within or above these ranges: site access difficulty on canal-front lots, existing structural remediation needs, and utility extension distances. We deliver a flat written price with a written scope and written warranty before any work starts - no “call for a quote” process, no open-ended allowances. Under Clause 1 of the Haven Standard, the number is fixed when you sign, and no change proceeds without your signature on a documented change order. Call (754) 254-8065 for your free estimate.
We Also Serve Cities Near Lighthouse Point
Our crews build across Broward and northern Palm Beach counties, including Home Additions & ADU in Lighthouse Point and surrounding communities: Boca Raton to the north, Deerfield Beach and Coconut Creek to the west, and Delray Beach extending our service area into Palm Beach County. Each city’s permitting, soil, and wind-load conditions get the same pre-quote assessment we bring to Lighthouse Point - no templated scopes, no assumptions based on the last job.
Serving Lighthouse Point, FL - Our Local Coverage Area
We’re based in the Lighthouse Point 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 Lighthouse Point
Lighthouse Point’s lots were created by dredging canals and piling the spoil as fill, leaving shallow water tables and low-bearing-capacity soils city-wide, while Pompano Beach sits on more stable native soils just inland. We routinely pull permits for what looks like a straightforward room addition in Lighthouse Point, then discover footing depths insufficient for the fill substrate and bring in an engineer for a thickened-edge slab or deeper grade beams. Call (754) 254-8065 and we’ll assess your specific lot conditions during the free estimate - no charge for the site visit or the geotechnical recommendation.
Both, usually. The City of Lighthouse Point handles zoning compliance and building plans review, but Broward County manages health department septic and well setback review, and the Florida Building Code’s High-Velocity Hurricane Zone requirements apply to all structural and opening-protection work. We coordinate both permitting tracks from the start and build the timeline into your written quote. Call (754) 254-8065 to schedule your free estimate and we’ll walk through the specific permits your project triggers.
Yes. The combination of direct Intracoastal exposure and prevailing onshore winds in Lighthouse Point accelerates corrosion of standard fasteners, lintels, and embedded rebar faster than inland South Florida communities. We spec stainless fasteners and hot-dip-galvanized connectors as baseline on marine-adjacent lots, and we document this material spec in the written quote with brand names and model numbers. Call (754) 254-8065 for an exact material list and price - estimates are free.
We don’t. Our written price follows a site visit with geotechnical assessment, footing evaluation, and documented photo record - the same process that kept our projects within a few percent of the agreed cost across 4,000-plus jobs since 2007. The “rough number” we might discuss on the phone is a range based on comparable Lighthouse Point builds, but the flat written price requires knowing what the soil and existing structure actually present. Call (754) 254-8065 to start that process; the site visit and assessment are free.
The engineered foundation revision triggered by dredged-fill soil conditions that a visual walk-through can’t detect. We’ve seen projects start with a quote that assumed standard footing depths, then hit fill that required geotech involvement, engineering, and revised foundation specs - costs that can move a project five figures if they weren’t scoped upfront. We eliminate this by assessing soil conditions before quoting and including either the engineered solution or a clearly triggered contingency in the written price. Call (754) 254-8065 for a free estimate that accounts for your specific lot conditions.
Ready to build? Call (754) 254-8065 to schedule your free estimate. We’ll deliver a written price with a written scope and written warranty before any work starts - the Haven Standard, documented and signed, on every Lighthouse Point addition and ADU we build.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Lighthouse Point since 2007.