Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterFast, Reliable Home Additions & ADU Across Palmdale
If you’re weighing a home addition or ADU in Palmdale, here’s the honest starting point: a room addition in this market typically runs $45,000 to $130,000, while a new detached ADU usually lands between $90,000 and $220,000. Those numbers assume the foundation work Palmdale jobs so often require, which we’ll get into below. We’re Barrett & Sons Construction, and our Home Additions & ADU team works here every week. Call (877) 610-1318 and we’ll give you a straight, written, no-surprises estimate.
Why Barrett & Sons Construction Is Palmdale’s Preferred Home Additions & ADU Company
Tom Barrett founded this company in 1998 and his sons run the crews today. When you call about an addition in the 93550 zip or a garage conversion off Palmdale Boulevard, the person answering is someone who knows the Antelope Valley, not a call center in another state. We answer the phone 24/7, but more importantly, we answer questions directly. What’s your lot’s soil look like? Are you in the high-fire zone east of Sierra Highway? Is that 1987 tract home on a post-tension slab? These aren’t follow-up items for us; they’re the first conversation.
We serve Palmdale homeowners from Quartz Hill to the 93552 corridor. Every job we take on includes permits pulled and inspections signed. When the permit inspector comes out, he works for you, not for us. That’s the way Tom has run Home Additions & ADU in Palmdale for 29 years: scope in writing, allowances in writing, change orders in writing. And every completed job carries the written 90-Day Done Right Promise. If something’s not right, one call brings Tom back.
Ask anyone on your street about that last contractor who promised one price and delivered another. Then look up our license number yourself. Tom publishes his name, address, and license number on every estimate. He lives close enough that if something’s wrong, he wants to hear about it.
Our Home Additions & ADU Services in Palmdale
ADU Design & Permitting
Palmdale’s planning department has specific ADU requirements, and we’ve navigated them on lots from Ana Verde to Rancho Vista. Whether you’re adding a detached unit behind a 1990s stucco home or converting garage space, the design phase, setbacks, and permitting sequence all matter. Water, sewer, and electric tie-ins across Palmdale’s slab-on-grade lots don’t always go where a stock ADU plan assumes. We handle the design, the drawings, and the permit package as one line item, so you’re not juggling an architect who’s never seen your soil report.
Garage Conversion ADU
A garage conversion in Palmdale typically runs $30,000 to $80,000, depending on whether you’re converting an attached two-car garage in 93551 or a detached structure with its own utility run. The big local variable is the slab. Many Palmdale garages poured between 1985 and 2005 sit on slabs that have settled or cracked as the Antelope Valley’s expansive clay soils cycled through wet winters and scorching summers. We assess the slab before we quote, because converting a garage without checking the floor is how you get a beautiful ADU with a door that stops latching by August.
New Detached ADU
Detached ADUs on Palmdale lots run $90,000 to $220,000, and wind load requirements here are real. The Antelope Valley corridor routinely sees 50-plus-mph gusts, which means framing, tie-downs, and roof connections have to be engineered for conditions a coastal contractor might never budget for. If your property sits in the foothills east of Sierra Highway inside the High Fire Hazard Severity Zone, you’re also under IRC Chapter R327 ignition-resistant construction rules: Class A our Roofing in Palmdale, enclosed eaves, tempered multi-pane windows. We factor compliance into the number you see first, not a change order you see later.
Junior ADU & Interior Conversion
A junior ADU, usually an interior conversion of a bedroom or bonus room, is the most budget-friendly path in Palmdale, often runnable through a simpler permit path than a detached build. We convert spaces into efficient units with their own kitchenette and bath connection, keeping site work to a minimum. For Palmdale homeowners who want rental income from a paid-off 1990s tract home without the big site prep, this is where we often recommend starting. We also handle Kitchen Remodeling in Palmdale and Bathroom Remodeling in Palmdale when the addition touches existing rooms.
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.
Trusted Brands We Service in Palmdale
We install materials you can look up, not mystery brands off a van. On ADU and addition work around Palmdale we regularly use Simonton and PGT Windows & Doors - Palmdale, which hold up better under the Antelope Valley’s temperature swings and wind than the builder-grade vinyl from 1995 you might have now. We keep local relationships with Palmdale suppliers, which means shorter lead times when your project’s at framing and the window order has to move. If a brand matters to you, say so on the first call. It goes in writing, same as the price.
Common Home Additions & ADU Problems We See in Palmdale Homes
- Cracked or heaving slabs under 1980s-2000s tract homes. Palmdale’s expansion-era housing went up fast on post-tension slabs over high-clay adobe soil. When we cut into a floor for a bathroom drain or a new wing, we check what’s underneath before we build on top of it.
- Wind-load underengineering on older additions. Some earlier Palmdale additions were framed to coastal standards. In a spring windstorm off the Tehachapi corridor, a 60-mph gust finds every weak rafter tie. Our additions get engineered for the real wind zone, not the convenient one.
- High-fire-zone compliance gaps. Homes east of Sierra Highway in the foothills above 93550 sit under different construction rules than valley-floor lots. An unpermitted sunroom or patio conversion out there can be a compliance problem when you go to add onto it legally. We fix the envelope before we extend it.
- Deferred maintenance on 20-to-40-year-old stucco and roofing. The extreme heat and cold cycling here ages caulk, sealant, and stucco fast. Before we tie a new addition into an existing wall or roofline, we inspect what we’re tying into. No one wants a brand-new room leaking at the seam where it meets a 1993 roofline.
Pricing for Home Additions & ADU in Palmdale, CA
Here are the numbers we quote from, in writing, before any work starts. A room addition in Palmdale runs $45,000 to $130,000. A new detached ADU runs $90,000 to $220,000. A garage conversion ADU runs $30,000 to $80,000. A junior ADU or interior conversion usually lands on the lower end of the room-addition range. What moves the needle in Palmdale specifically is foundation condition and wind-zone engineering. A hillside lot east of Sierra Highway with fire-zone compliance will cost more than a flat Rancho Vista lot with a clean slab. We give free estimates and a written second opinion on any estimate you bring us. No trip charge inside the county. Call (877) 610-1318 and we’ll put every number on paper.
We Also Serve Cities Near Palmdale
We work across the Antelope Valley, so if you live just outside Palmdale in Sun Village, Quartz Hill, Acton, or Lancaster, the same crew and the same written pricing structure apply. Call (877) 610-1318 to schedule your free estimate, or to get that second opinion on a written bid you’re sitting on.
Serving Palmdale, CA - Our Local Coverage Area
We’re based in the Palmdale 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 Palmdale
We schedule estimates in Palmdale every week, and in many cases we can walk your property within a few days of your call. Our Palmdale work is coordinated from our Los Angeles office, but the crews live and work locally, and Tom is on-site for the important conversations. Call (877) 610-1318 to get on the schedule.
Yes. We work across all four Palmdale zip codes: 93550, 93551, 93552, and 93590. That includes Quartz Hill, Rancho Vista, Ana Verde, the foothill communities east of Sierra Highway, and everything in between. If you’re not sure whether your street is in our service area, call and ask. The answer is almost certainly yes.
If we uncover a foundation crack, a failed beam, or a wind-damaged section of framing mid-project, we stop and show you what we found, in person, before we touch anything else. Then we give you a written change order with a fixed number. Nothing moves forward until you agree. That’s how the 90-Day Done Right Promise works too. One call brings Tom back, even after the job is closed.
Palmdale and Lancaster share the same tract-home stock and the same high-clay soil conditions, so our pricing is broadly similar across the Antelope Valley. Acton, which sits in a different fire zone and has more hillside and unincorporated-county lots, can run higher on site work and defensible-space compliance. The quickest way to know is a written estimate. They’re free, and we don’t charge a trip fee inside the county.
Every home addition and ADU we build comes with a written 90-Day Done Right Promise. If something isn’t done right, one call brings Tom Barrett back to make it right. That’s the same promise we’ve written on every contract since 1998, and it doesn’t change based on which Palmdale neighborhood you live in. Call (877) 610-1318 for a free estimate and a warranty you can hold in your hand.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Palmdale and the Antelope Valley.