Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterConstruction in Simi Valley, CA
Kitchen remodeling in Simi Valley runs $14,000 to $45,000 for a full job, and the work here is shaped by one thing more than any other: most homes were built between 1963 and 1985, so crews open walls and find the same deferred-maintenance patterns block after block. Original single-pane windows, aging stucco over slab foundations on expansive clay, and in the older east-side tracts, aluminum branch wiring. Add in Ventura County’s Wildland-Urban Interface fire codes that now govern what materials you can put back on, and a Simi Valley remodel is a different animal from the same job 20 miles east in the San Fernando Valley. Call (470) 298-9650 for a written price before any work starts.
Why Simi Valley Homes Are Different
Simi Valley sits in an inland bowl ringed by the Santa Susana Mountains and the Simi Hills, and that geography does two things to a house. First, Santa Ana winds funnel through the valley and hit roofs, stucco, and fences harder than almost anywhere else in Ventura County. We see wind-driven shingle loss, cracked stucco at corner beads, and fence post failures after every major Santa Ana event. Second, summer heat regularly passes 100°F, so roofing membranes, painted stucco, and exterior caulking age on an accelerated cycle compared to coastal cities 20 miles west.
The housing stock compounds this. The dominant construction is single-story and two-story wood-frame tract homes, most built between roughly 1963 and 1985 on slab foundations. Under those slabs, expansive clay soils shrink in drought and swell in wet winters, producing the widespread foundation cracks and flatwork heave we document on kitchen, bathroom, and addition jobs throughout the central and east neighborhoods. And because large portions of the city fall inside Ventura County’s WUI fire zone, any significant renovation, re-roof, or addition triggers ignition-resistant material requirements and Ventura County Fire Department documentation that contractors from LA County rarely deal with.
Our Main Simi Valley Services
Beyond the five trades detailed below, Simi Valley homeowners call most often about two exterior projects: fences that Santa Ana winds have taken down, and driveways cracked by the same expansive clay soils that heave slab foundations.
Fence Installation in Simi Valley
Fence work in Simi Valley is a wind-load problem before it is an aesthetic one. Posts set in shallow concrete, common on original 1970s and 1980s tract homes, loosen and lean after repeated Santa Ana events, and redwood or cedar pickets dry out fast in 100°F summers. We quote vinyl and aluminum fence installation at $3,500 to $10,000 depending on linear footage, and every quote is a written flat price with a written scope. Learn more about Fence Installation in Simi Valley.
Driveway & Pavers in Simi Valley
Concrete driveways in Simi Valley crack from below, not from above. The expansive clay under most slabs moves seasonally, and older flatwork laid without proper control joints eventually heaves and spalls. Paver driveway installation runs $7,000 to $18,000, concrete replacement $4,500 to $12,000, and asphalt paving $3,500 to $9,000. We pull permits where required and document existing slab condition before quoting. See Driveway & Pavers in Simi Valley for the full breakdown.
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.
BeforeAfterKitchen Remodeling in Simi Valley
A full kitchen remodel in Simi Valley costs between $14,000 and $45,000, and the range depends on what’s behind the walls. Most kitchens in this city were last touched when the house was built, so we routinely find aluminum branch wiring in east-side homes from the 1960s, original single-pane windows above the sink, and slab foundations that have shifted enough to make cabinet leveling a real task. Under Clause 1 of the Haven Standard, the price is written before anyone starts, and that number does not move without a signed change order. We stock KraftMaid and Wellborn cabinets and Cambria and Caesarstone countertops, and the written quote names the exact line items. For the full service breakdown, see Kitchen Remodeling.
Full Kitchen Remodeling
Signs you need it
Layout no longer works for how you cook, wiring or plumbing is original to a 1963-1985 build, or cabinets are delaminating from decades of Simi Valley heat cycling.
What it costs in Simi Valley
Full kitchen remodels in Simi Valley run $14,000 to $45,000 depending on footprint, layout changes, and material selections.
How we do it
We document existing conditions with photos, pull the permit package including any WUI exterior requirements triggered by the scope, then demo, rough in, install, and finish to the written scope, with a signed change order required before any deviation.
Cabinets & Countertops
Signs you need it
Doors sag or won’t close, drawer slides are failing, or the countertop is cracked, stained, or delaminating at the seams.
What it costs in Simi Valley
Cabinet installation runs $4,000 to $13,000 and countertop installation $2,000 to $6,500 in Simi Valley, with cambria and caesarstone quoted at their actual slab and fabrication rates.
How we do it
We template counters after cabinets are set, level boxes to the slab’s actual plane, and install with shims and scribe molding so doors align on floors that have moved over 40 years.
Backsplash, Tile & Flooring
Signs you need it
Grout is cracking or stained beyond cleaning, tile is loose over shifting slabs, or the flooring has failed where the kitchen meets a slab crack.
What it costs in Simi Valley
Backsplash installation runs $800 to $2,500 in Simi Valley; tile and flooring are quoted per square foot with an isolation membrane under tile where slab movement exists.
How we do it
We check for slab heave before setting tile, use a decoupling membrane where movement is documented, and seal grout to handle Simi Valley’s dry heat and seasonal humidity swings.
What Kitchen Remodeling Costs in Simi Valley
| Item | Typical range in Simi Valley |
|---|---|
| Full kitchen remodel | $14,000 – $45,000 |
| Cabinets & countertops | $4,000 – $13,000 / $2,000 – $6,500 |
| Kitchen island installation | $3,000 – $10,000 |
Does a Simi Valley kitchen remodel require fire-resistant materials?
If your home sits in a WUI-mapped foothill tract, exterior-facing changes like windows or vents trigger ignition-resistant material requirements. Interior kitchen work typically does not, but the permit review will flag any exterior scope. Call (470) 298-9650 and we’ll check your parcel.
Can you remodel an original 1970s Simi Valley kitchen without rewiring?
Not always. Homes in the older east-side tracts often have aluminum branch wiring, and adding circuits or moving outlets triggers code requirements for breaker-compatible materials. We inspect and price any necessary electrical work in the written quote before starting. Call (470) 298-9650 for a written line-item estimate.
Bathroom Remodeling in Simi Valley
Bathroom remodeling in Simi Valley runs $9,000 to $28,000 for a full job, with small bathrooms starting around $5,000. The recurring issue in this city’s tract homes is water damage hidden under original tile and around tubs, often worsened by slab movement that opens grout and caulk joints and lets water reach the framing. We specify Kohler and Toto fixtures, and every quote is a flat written price with a written scope. For the full service breakdown, see Bathroom Remodeling.
Walk-In Showers & Shower Remodeling
Signs you need it
Grout is cracked and letting water through, the tile feels loose, or the shower pan has failed and is staining the ceiling below.
What it costs in Simi Valley
Walk-in shower installation runs $4,500 to $12,000 and shower replacement $3,000 to $8,500 in Simi Valley.
How we do it
We demo to the studs and slab, inspect the pan and curb for prior water damage, install a waterproof membrane tested before tile, and set tile over it with proper slope to drain.
Tub-to-Shower Conversion
Signs you need it
The tub is unused, difficult to step into, or its drain and overflow are corroded and leaking into the slab or wall cavity.
What it costs in Simi Valley
Tub-to-shower conversions in Simi Valley run $3,500 to $10,000 depending on plumbing relocation and tile scope.
How we do it
We remove the tub, rework the drain for a shower, install the membrane and slope, and finish with code-compliant grab blocking and tile, all documented in the written scope.
What Bathroom Remodeling Costs in Simi Valley
| Item | Typical range in Simi Valley |
|---|---|
| Full bathroom remodel | $9,000 – $28,000 |
| Walk-in shower installation | $4,500 – $12,000 |
| Bathroom vanity installation | $800 – $3,000 |
Will a Simi Valley bathroom remodel uncover mold or dry rot?
Often, yes. Original 1963-1985 tract bathrooms were not waterproofed the way code requires now, and slab movement cracks grout and caulk over time, letting water into the substrate. We document what we find with photos and price remediation in a written change order only if you approve it. Call (470) 298-9650 to schedule a look.
How long does a bathroom remodel take in Simi Valley?
A typical full bathroom runs two to four weeks depending on plumbing and tile scope; a tub-to-shower conversion is faster. Your written quote includes a schedule with milestones, and any change to that schedule comes with an explanation in writing. Call (470) 298-9650 for a written estimate.
Roofing in Simi Valley
Roof replacement in Simi Valley runs $8,000 to $20,000, and the number is driven by two local realities: the wind loads from Santa Ana events funneling through the valley, and WUI fire-zone material requirements that apply to large portions of the city’s foothill-adjacent tracts. Roofs here age faster than coastal ones because of the summer heat and UV exposure, so we see granule loss and membrane breakdown earlier than in Camarillo or Ventura. We quote GAF and Owens Corning systems, and every roof quote includes a written scope with the layer count and substrate condition documented before pricing. See Roofing for details.
Roof Repair
Signs you need it
Shingles are missing after a Santa Ana event, there’s water staining on ceilings, or pipe boots and vents are cracked from UV exposure.
What it costs in Simi Valley
Roof repair in Simi Valley runs $400 to $1,800, and tile roof repair runs $600 to $2,500 depending on the extent of damage.
How we do it
We inspect the entire roof, document damage with photos, replace the failed materials to match, and quote any deeper substrate or underlayment work on a written change order if the repair exposes it.
Roof Replacement & Installation
Signs you need it
The roof is 20 to 25 years old, shingles are curling or granule-bald, or the underlayment has failed and leaks persist despite repairs.
What it costs in Simi Valley
Full roof replacement runs $8,000 to $20,000 in Simi Valley, with metal roof installation running $15,000 to $40,000.
How we do it
We strip to the deck, photograph sheathing condition, install new underlayment, and set shingles or metal per manufacturer spec and WUI ignition-resistant requirements where your parcel is mapped in the fire zone.
What Roofing Costs in Simi Valley
| Item | Typical range in Simi Valley |
|---|---|
| Roof replacement | $8,000 – $20,000 |
| Roof repair | $400 – $1,800 |
| Metal roof installation | $15,000 – $40,000 |
Do I need ember-resistant vents in Simi Valley?
If your home is in a WUI-mapped zone, yes. The Ventura County Fire Department requires Brandguard-style ember-resistant vent covers and ignition-resistant material documentation on re-roofs and significant exterior renovations. We build that into the written quote. Call (470) 298-9650 to check your parcel.
Can you repair a concrete tile roof after a Santa Ana wind event?
Yes, tile roof repair in Simi Valley runs $600 to $2,500. We document the damage, match the tile profile, and check the underlayment beneath broken tiles because wind-driven rain often gets past the tile itself. Call (470) 298-9650 for a written estimate.
Windows & Doors in Simi Valley
Window replacement in Simi Valley runs $4,500 to $15,000 for a typical home, and the original single-pane units in most 1963-1985 tract houses are the source of both high cooling costs and WUI compliance issues. Simi Valley’s summer heat and Santa Ana winds put real stress on exterior doors and caulked penetrations, and in fire-zone tracts, replacement windows and doors must meet ignition-resistant standards. We install energy-efficient windows and impact-rated products, and every quote names the exact window and door brands. See Windows & Doors for the full breakdown.
Window Replacement
Signs you need it
Frames are warped or leaking, single-pane glass is original, or rooms overheat in summer and the caulking fails rapidly in the dry heat.
What it costs in Simi Valley
Window replacement runs $4,500 to $15,000 in Simi Valley depending on unit count, frame material, and glass package.
How we do it
We measure each opening, document existing flashing and frame condition, then install with new flashing and insulation per the written scope and any WUI requirements for your parcel.
Impact Windows & Doors
Signs you need it
Your home is in a fire-zone tract, you want code-compliant ignition-resistant exteriors, or you’re replacing patio sliders and entry doors that have warped in the heat.
What it costs in Simi Valley
Impact window installation runs $8,000 to $25,000 in Simi Valley depending on the opening count and product spec.
How we do it
We quote impact-rated products that meet both the structural wind loads common in Simi Valley and the ignition-resistant requirements of Ventura County’s WUI code, then install them with documented flashing and air sealing.
What Windows & Doors Costs in Simi Valley
| Item | Typical range in Simi Valley |
|---|---|
| Window replacement | $4,500 – $15,000 |
| Impact window installation | $8,000 – $25,000 |
| Door installation (exterior) | $1,500 – $6,000 |
Do Simi Valley window replacements need a permit?
Yes, in most cases. Window replacements that alter the opening, or any exterior door work, typically require a permit, and WUI-zone parcels have additional material documentation requirements. We pull permits and include the paperwork in the written scope. Call (470) 298-9650 to confirm for your home.
Will new windows reduce cooling costs in Simi Valley’s summer heat?
Yes. Original single-pane windows are a primary source of solar heat gain in 1960s and 1970s tract homes, and energy-efficient replacements with low-E glass reduce that load measurably. We can quote the glass package line by line. Call (470) 298-9650 for a written estimate.
Home Additions & ADU in Simi Valley
Home additions in Simi Valley run $45,000 to $130,000, and ADU construction runs $90,000 to $220,000 depending on whether it is an interior garage conversion or a new detached structure. This city’s additions and ADUs carry two extra layers other cities do not: the expansive clay soils under nearly every slab require foundation engineering, and WUI fire-zone parcels add ignition-resistant material and documentation requirements to the permit package. We quote Abodu, Cover, Dvele, and Mighty Buildings systems where they fit the parcel, and the written price includes the engineering and permit scope. See Home Additions & ADU for details.
Garage Conversion ADU
Signs you need it
You have an attached or detached garage with a slab and framing that can be converted, and you want rental income or a family unit without new site work.
What it costs in Simi Valley
Garage conversion ADUs run $30,000 to $80,000 in Simi Valley depending on plumbing, electrical, and insulation scope.
How we do it
We inspect the existing slab for cracking from expansive clay, verify the framing and roof condition, then quote the conversion with the full mechanical scope and a written permit plan.
New Detached ADU
Signs you need it
You want a separate unit in the rear yard, and your parcel has the setbacks and access for a new slab and structure.
What it costs in Simi Valley
New detached ADU construction runs $90,000 to $220,000 in Simi Valley depending on square footage and finish level.
How we do it
We start with a soils report, design the foundation for the expansive clay, submit the permit package including WUI-compliant exteriors where required, then build to the written scope with signed change orders for any deviation.
What Home Additions & ADU Costs in Simi Valley
| Item | Typical range in Simi Valley |
|---|---|
| Home addition | $45,000 – $130,000 |
| ADU construction | $90,000 – $220,000 |
| Garage conversion | $30,000 – $80,000 |
Does an ADU in Simi Valley require WUI fire-zone materials?
If your parcel is mapped in the WUI zone, yes. New detached structures and significant conversions must meet ignition-resistant exterior standards and include ember-resistant vents. We document this in the written permit plan and price it in the original quote. Call (470) 298-9650 to check your parcel.
Will the expansive clay under my Simi Valley slab affect an addition?
Yes, and we engineer for it. The shrink-swell clay under most slabs in this city heaves and contracts seasonally, so new foundations need soil-specific design that older tract homes did not have. We include the soils report and foundation scope in the written quote. Call (470) 298-9650 for a written estimate.
Brands We Service in Simi Valley
We work with over 50 vetted material brands, including Abodu, Cover, Dvele, and Mighty Buildings for ADU systems, plus KraftMaid, Wellborn, Cambria, Caesarstone, GAF, Owens Corning, Kohler, and Toto across our other trades. See our brands for the full list, and we’ll name the exact brands in your written quote.
Pricing for Construction in Simi Valley, CA
| Service | Typical range in Simi Valley |
|---|---|
| Full kitchen remodel | $14,000 – $45,000 |
| Bathroom remodel | $9,000 – $28,000 |
| Roof replacement | $8,000 – $20,000 |
| Window replacement | $4,500 – $15,000 |
| Home addition | $45,000 – $130,000 |
| ADU construction | $90,000 – $220,000 |
| Garage conversion | $30,000 – $80,000 |
| Paver driveway installation | $7,000 – $18,000 |
| Concrete driveway installation | $4,500 – $12,000 |
| Vinyl fence installation | $3,500 – $9,000 |
What pushes prices up in Simi Valley is nearly always the same pair: WUI fire-zone material and documentation requirements on exterior-facing work, and foundation or substrate repair on homes where expansive clay has moved the slab. That is why every Rowan Construction Group quote is a written flat price with a written scope, delivered before any work starts.
Neighborhoods We Serve in Simi Valley
We work across Simi Valley, from the original east-side tracts near the 118 to the newer foothill-adjacent developments. Our crews are dispatched locally, and we typically schedule written estimates within a few business days of your call.
- Central Simi Valley (Sycamore, Erringer, Cochran corridors)
- East Simi Valley (Yosemite, Los Amigos, Katherine)
- Wood Ranch
- Big Sky and North Simi hillside tracts
- West Simi Valley (Madera, Sequoia, Tapo)
Service Area - Cities Near Simi Valley
Rowan Construction Group also serves Moorpark, CA, Thousand Oaks, CA, West Hills, CA, and Chatsworth, CA. The same written-price standard applies on every project in every city, with dispatch and scheduling coordinated from our Los Angeles office and local crews serving Simi Valley directly.
Serving Simi Valley, CA - Our Local Coverage Area
We’re based in the Simi Valley 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 About Construction in Simi Valley
We schedule written estimates within a few business days across Simi Valley, and our crews work from local dispatch. A live person answers calls 24/7 at (470) 298-9650, and we document every visit with a photo record included as standard.
Many do, especially in Wood Ranch and other planned communities where exterior changes, roofing materials, fence styles, and ADU structures are subject to HOA review. We prepare the drawings and documentation your HOA requests as part of the written permit scope. Call (470) 298-9650 to discuss your specific tract.
No work proceeds on a change until the change order is signed. Our founding discipline is a written flat price and a written scope before work begins, and that is what has kept projects within a few percent of the agreed number across 4,000-plus jobs. Call (470) 298-9650 for a written estimate.
What happens when you call
- 1A real person answersNo phone trees - talk to a local construction pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Simi Valley Customers Say
"Final invoice was within two percent of the contract. Every change was priced and signed before anyone picked up a tool."
- Malcolm T."Fence and retaining wall along a sloped boundary. They photographed the footing depth at each post, which mattered when the county inspector came."
- Iona F."Talked us out of the larger scope we came in asking for, because it would not have added the value we thought."
- Emil R.