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 Andover
Adding square footage to a home in Andover, FL is not a simple framing job. A permitted addition or ADU on a 1950s-1970s CBS home in ZIP 33023 triggers Broward County’s high-velocity hurricane zone code, which means the existing roof-to-wall connection, not just the new walls, has to meet current wind-load standards before the final inspection signs off. Most homeowners in Andover hear that for the first time from us, after a cheaper bid already stalled. We scope the whole structure from day one so your permit clears, your inspection passes, and your addition is legal, insurable, and built to stay. Call (877) 610-1318 and we’ll walk you through what a compliant quote for your Andover home actually includes.
Why Barrett & Sons Construction Is Andover’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998 and put his name on the truck. His sons run the crews, and Tom is on-site for the work that matters: load-path retrofits, roof-to-wall connections, and the framing inspection that makes or breaks a permit in Andover’s HVHZ. We’re not a franchise dispatching strangers. When we scope an ADU or room addition in Andover, the person who writes the change order is the same person who meets the inspector.
We know the CBS housing stock in Andover because we’ve worked on it. Flat and low-slope roofs from the 1960s, original roof decks nailed with smooth-shank nails at wide spacing, masonry walls built before current bearing-capacity requirements. A contractor who has never pulled a permit in this ZIP will not know that adding a second story over an unreinforced 1960s CBS wall is a stop-work order waiting to happen. We do, and we plan for it before the first nail moves.
Every price change arrives in writing as a change order. Permits get pulled and inspections get signed on every eligible job. And every completed job carries the 90-Day Done Right Promise: if it’s not right, Tom comes back. One call. That’s the standard for any addition or ADU we build in Andover.
Key Takeaways
- Andover additions and ADUs must pass Broward County HVHZ wind-load inspections, including the existing structure, not just the new square footage.
- A compliant quote includes roof-deck re-nailing or replacement, load-path retrofits, and impact-rated openings on the expanded structure.
- Barrett & Sons has been owner-operated since 1998, with Tom Barrett and his sons on-site for Andover jobs.
- Every change order is written before the work happens, and every permit is pulled before the crew starts.
Our Home Additions & ADU Services in Andover
ADU Design & Permitting
Before you draw a single wall, we confirm whether the existing roof-to-wall connection on your Andover home will pass the HVHZ re-inspection that comes with an ADU permit in ZIP 33023. That one check determines whether your budget includes re-nailing the original deck or replacing sections of it. We handle the permit package, the structural drawings, and the inspections, so the ADU you design is the ADU that passes.
New Detached ADU
A detached ADU on an Andover lot gives you a separate addressable unit without touching the existing foundation, but it still has to meet the same wind-load and impact-opening standards as the main house. We build new detached ADUs with rated roof connections, impact-rated windows and doors, and drainage planned around the high water table that sits only 2 to 4 feet below grade across much of this stretch of Broward County. Expect ADU construction in Andover to run $90,000 to $220,000 depending on size, finishes, and site conditions.
Garage Conversion ADU
Converting an attached garage in Andover looks simpler than it is. The concrete slab was poured for a car, not a bedroom, so we have to address moisture, insulation, and a new load path before the inspector will sign off. We also check whether the garage’s original roof framing ties back to the main structure adequately, because Broward’s HVHZ code applies to the whole building once you expand conditioned space. Garage conversions in Andover typically run $30,000 to $80,000.
Junior ADU & Interior Conversion
A junior ADU built inside the existing footprint of your Andover home is usually the least disruptive way to add a rentable or in-law unit. But even an interior conversion changes the occupancy, which means the inspector looks at egress, smoke detection, and the existing structure’s wind resistance. We scope the work to pass that look. Our Home Additions & ADU team handles the full conversion from studs to finish.
Second Story Additions
A second story over a 1960s CBS home in Andover is one of the most demanding projects we take on. Unreinforced masonry walls from that era were never designed to carry a second floor, so the scope has to include steel columns, a new load path, and an engineer’s assessment of the existing wall’s bearing capacity. Skip that step and the inspector issues a stop-work order. We include it in the quote from the start. Home additions in Andover range from $45,000 to $130,000, and a second story will sit at the upper end of that range for good reason.
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.
Trusted Brands We Service in Andover
When the job calls for hardscape or site work around your new ADU, we install materials you can look up, not mystery brands off a van. For paver driveways, walkways, and patio areas adjacent to new construction in Andover, we use Belgard, Techo-Bloc, and Cambridge Pavers depending on the look and the load requirements. Our crews keep common paver sizes and edging on hand for Andover jobs, which keeps a site-prep or utility trench project moving without a week of downtime waiting on materials.
Common Home Additions & ADU Problems We See in Andover Homes
- Existing roof decks that fail HVHZ re-inspection. On a 1962 CBS ranch in Andover’s 33023, we scoped a 400-square-foot ADU addition and found the original roof deck nailed with smooth-shank nails at 24-inch spacing. Our crew re-nailed the entire existing deck to HVHZ 6-inch/12-inch spacing before framing the new load-bearing walls, then ran a new branch circuit and HVAC rough-in under permit. The inspector signed off on the roof-to-wall connection, not just the addition.
- Non-impact openings on the expanded structure. Broward County requires impact-rated windows, doors, or shutters on every opening of a new or expanded structure. A quote that leaves non-rated openings in an Andover ADU gets rejected at the fenestration inspection.
- Second-story additions over unreinforced 1960s CBS walls. Without steel columns or a new load path, the inspector checks the existing masonry’s bearing capacity and issues a stop-work order. This is not a risk we take on any Andover job.
- Foundation and drainage surprises from the high water table. With groundwater often 2 to 4 feet below grade in this part of Broward County, any ground-disturbing work on an Andover addition needs drainage and foundation planning before the dig, not after the water shows up.
Pricing for Home Additions & ADU in Andover, FL
In Andover, a home addition runs $45,000 to $130,000, a garage conversion runs $30,000 to $80,000, and a new ADU runs $90,000 to $220,000. What moves the number within those ranges: whether the existing roof deck needs re-nailing or replacement, whether the masonry walls need steel reinforcement for a second story, whether site drainage requires additional work because of the high water table, and the finish level you choose for the new space. Here’s the line-item breakdown:
| Service | Andover Price Range |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Garage Conversion | $30,000 - $80,000 |
Every quote we write for an Andover job includes the HVHZ retrofit steps a compliant permit requires. If a lower bid omits roof-deck re-nailing or impact-rated openings, that bid is not for the same job. Call (877) 610-1318 and we’ll write a scope that matches what the inspector will actually ask for. Estimates are free, and the number we give you is the number we stand behind, in writing.
We Also Serve Cities Near Andover
While this page is written for homeowners in Andover, our crews regularly build additions and ADUs in the surrounding cities. If you’re in Miramar, West Park, Hollywood, or West Hollywood, the same HVHZ standards apply, and the same Barrett & Sons team handles the work. One company, one owner, one standard across this stretch of Broward County.
Serving Andover, FL - Our Local Coverage Area
We’re based in the Andover 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 Andover
Yes. In Andover’s ZIP 33023, an ADU permit triggers a full re-inspection of the existing roof-to-wall connection, not just the new square footage, because Broward County’s HVHZ code requires the entire structure, including the older 1950s-1970s CBS portion, to meet current wind-load standards before final inspection sign-off. A quote that only covers the new ADU and ignores the existing roof deck will not pass inspection. Call (877) 610-1318 and we’ll tell you whether your existing structure needs retrofitting before you commit to the project.
Because Broward County inspects the whole structure, not just the addition. On a 1962 CBS ranch in Andover’s 33023, we found the original roof deck nailed with smooth-shank nails at 24-inch spacing, a detail that fails HVHZ re-roofing and wind-load inspection outright. Our crew re-nailed the entire existing deck to HVHZ 6-inch/12-inch spacing before framing the new load-bearing walls, and the inspector signed off on the roof-to-wall connection, not just the addition. A cheap quote omits this step, and the permit stalls. Call us at (877) 610-1318 to get a scope that includes it from day one.
Impact-rated windows on your Andover ADU meet Broward County’s fenestration requirement and provide documented compliance that your insurer can verify after a storm. Non-impact windows on a new ADU trigger a rejection at the fenestration inspection, meaning the project is not legal, not insurable, and not something an adjuster will treat kindly after a claim. The permit record and the signed inspection are the documentation your insurance company wants. Get the details on impact-rated openings for your addition by calling (877) 610-1318.
No. Once you expand conditioned space into the garage, the inspector evaluates the entire structure under current HVHZ standards, including the existing roof-to-wall connection. The concrete slab, the tie-back between the garage roof and the main structure, and the existing openings all come under review. We plan for that from the first walkthrough, so your Andover garage conversion passes inspection the first time. Call (877) 610-1318 for a free estimate on a conversion that’s scoped to comply, not to surprise you later.
A compliant scope includes steel columns or a new load path for the existing masonry walls, an engineer’s assessment of the 1960s CBS bearing capacity, roof-deck re-nailing to HVHZ spacing, impact-rated openings on the expanded structure, and drainage planning for the high water table 2 to 4 feet below grade. A low bid omits most of that because it’s written for a hypothetical house, not an Andover house. We write the scope for your actual structure. Call (877) 610-1318 and we’ll walk the site and put it in writing.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Andover since 1998.