Fast, Reliable New Detached ADU Across Pedley
A new detached ADU in Pedley typically runs $220,000-$420,000 all-in, from the first site measure through final Jurupa Valley inspection, with drawings and construction under a single contract at a single written price. We coordinate scheduling from our Inland Empire office and serve Pedley directly, including the ranch-style neighborhoods off Limonite Avenue, the quarter-acre parcels near Jurupa Hills, and the semi-rural lots running toward the Santa Ana River wash. Call (909) 637-3715 to schedule your free estimate.
Pedley’s oversized lots and 1950s-1970s housing stock create real opportunities for detached ADUs, but they also create real permitting complexity. Jurupa Valley - incorporated in 2011 - reviews every Pedley ADU through its own planning and building department, not Riverside County’s. That jurisdictional detail derails projects when homeowners or contractors design to county rules. Our New Detached ADU team has navigated Jurupa Valley’s process since the city’s incorporation, and we know what the pre-application review flags before it flags it.
Why Ellery ADU Studio Fontana Is Pedley’s Preferred New Detached ADU Company
We’ve designed, permitted, and built ADUs across the Inland Empire since 2015 - the same year California’s ADU laws began shifting - and Pedley’s semi-rural lots have been part of that work from the start. Our crews know the difference between a Jurupa Valley setback and a county setback, and we know which Pedley neighborhoods sit on expansive clay soils that affect foundation design.
Our clients in Pedley receive the same documentation we provide everywhere: a written price before any work starts, per Haven Standard Clause 1; a documented photo record on every site visit; and a 365-Day Done Right Promise backed in writing. If the finished ADU doesn’t match the permitted drawings, we make it right. No designer-versus-builder blame gap, because design and build are one contract.
Response time to Pedley is same-day for initial site measures once you’re on our calendar. We don’t promise emergency dispatch for planned construction, but we do promise a live person answers calls 24/7 - no voicemail queue, no callback that doesn’t materialize.
Our license number appears on every page, and our crews are background-checked and uniformed. We also offer a Free Second Opinion on any written estimate already in hand, so if another builder’s quote has you uncertain, we’ll review it against the actual scope.
Our New Detached ADU Services in Pedley

Custom Built ADU
A custom built ADU in Pedley starts around $280,000 and runs to $420,000 or more depending on size, finish level, and site complexity. These are stick-framed structures designed from scratch to match your existing ranch house, navigate your lot’s specific setbacks, and accommodate any legacy structures that need clearing first. On Pedley’s quarter-acre-plus parcels, we often have room to design a 750-square-foot 1-bedroom or a 1,200-square-foot 2-bedroom unit with dedicated parking and its own utility meter. We handle the full permit set through Jurupa Valley’s building department, not Riverside County’s, and we flag unpermitted workshops or tack rooms before they stall your project.

Prefab ADU Installation
Prefab ADU installation in Pedley typically ranges $220,000-$340,000 all-in, including site prep, foundation, utility tie-ins, and Jurupa Valley permitting. We specify and coordinate systems from brands including Cover and Mighty Buildings, integrating the prefab unit into a single contract with the same written-price guarantee. Pedley’s wide lots and rear-yard access often make crane placement straightforward, though we always verify overhead utility clearances and driveway load limits before scheduling the set. The extreme summer heat here means we pay particular attention to the unit’s Title 24 mechanical cooling specification - a 105°F day in Pedley is not theoretical.

Modular ADU
Modular ADU projects in Pedley generally fall between $240,000 and $360,000, depending on module count and site work. We work with Dvele and other modular systems, coordinating factory delivery with on-site foundation and utility work under one contract. Jurupa Valley’s building department inspects the set and finish work, and we manage that sequence so the factory warranty and our 365-Day Done Right Promise overlap cleanly. On Pedley’s older lots, we frequently encounter galvanized plumbing and undersized panels that need upgrading before the modular unit can tie in - we identify this during the initial site measure and price it into the written quote, not as a later change order.

Studio ADU
A studio ADU in Pedley - typically 400-600 square feet, detached - runs $220,000-$320,000 complete. These are ideal for Pedley’s rental market, where the extreme summer heat makes cooled living space genuinely valuable to tenants and where homeowners are often looking to offset high utility bills. We built a 600-square-foot detached studio ADU behind a 1968 ranch house on a quarter-acre-plus lot off Limonite Avenue, but the pre-application walk flagged a cinder-block workshop and a tack room that had never been permitted, so we legalized the workshop and demoed the tack room before the ADU plans would move. The undersized 100-amp panel needed a service upgrade to carry the new unit’s load, and we framed with James Hardie siding on the new structure so it would match the original house. The work ran through Jurupa Valley’s building department, not Riverside County, which the homeowner had assumed would be the reviewer.

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 Pedley
We specify and coordinate prefab and modular systems from Cover, Dvele, Mighty Buildings, Boxabl, and other manufacturers, always within our single-contract model. For Pedley clients, this means we source the unit, manage factory delivery timing around Jurupa Valley’s inspection schedule, and handle any warranty coordination if a factory defect appears during our build. We don’t drop a unit on your slab and disappear - we stay through final inspection, with the same documented photo record and written price guarantee that governs every Ellery project.
Common New Detached ADU Problems We See in Pedley Homes

- Unpermitted legacy structures block permitting. Jurupa Valley’s pre-application review flags old tack rooms, cinder-block workshops, and informal garage additions on Pedley lots. Contractors who don’t identify and legalize or demo these before pulling ADU permits face project holds that add months. We clear them first, priced into the original quote.
- Designs submitted to the wrong jurisdiction. Pedley sits inside Jurupa Valley, not unincorporated Riverside County. Plans checked against county rules get rejected outright. We design to Jurupa Valley’s specific setback, height, and lot-coverage requirements from the first drawing.
- Undersized electrical panels can’t carry the new load. Pedley’s 1950s-1970s ranch homes often have 100-amp service and original galvanized plumbing. An ADU with modern appliances, HVAC, and electric water heating typically requires a 200-amp upgrade. We identify this during site measure and include it in the written scope, not as a surprise mid-project.
- Single-driveway access stalls construction logistics. A detached ADU at the rear of a tight Pedley lot needs a route for concrete trucks, framing materials, and crane placement if prefab. We map staging and access before quoting, so the pour doesn’t stall for lack of a plan.
Pricing for New Detached ADU in Pedley, CA
A typical custom built detached ADU in Pedley runs $280,000-$420,000 all-in. Prefab and modular units typically range $220,000-$360,000. Studio ADUs at the smaller end start near $220,000; 2-bedroom units with full kitchens and separate utility meters run toward the top of the range.
What moves the number: site access and staging complexity; whether legacy unpermitted structures need legalizing or demolition; electrical service upgrades; foundation conditions on Pedley’s expansive clay soils; and finish level from standard to premium. Every project is quoted with a written price before any work begins, per Haven Standard Clause 1. No “call for pricing,” no open-ended allowances. Call (909) 637-3715 for your free estimate.
We Also Serve Cities Near Pedley

Our crews work throughout the western Inland Empire, including Pedley and neighboring Fontana, Rialto, Bloomington, and Rancho Cucamonga. The same single-contract model, written pricing, and Jurupa Valley permitting expertise apply across the service area.
Serving Pedley, CA - Our Local Coverage Area
We’re based in the Pedley 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 - New Detached ADU in Pedley

Jurupa Valley permits all detached ADUs in Pedley, not Riverside County. Pedley sits inside Jurupa Valley’s city limits, and the city’s planning and building department - established when Jurupa Valley incorporated in 2011 - reviews every ADU submittal against its own municipal code. Plans designed to county rules get rejected on first review. Call (909) 637-3715 for a free estimate and we’ll verify your parcel’s jurisdiction before any drawings begin.
Jurupa Valley flags unpermitted legacy structures during pre-application review and will not advance your ADU permit until they are legalized or demolished. Many Pedley properties have cinder-block workshops, tack rooms, or informal garage additions from the semi-rural era that were never permitted. We identify these during our initial site measure, price the clearing work into your written quote, and handle the sequence so your ADU permit isn’t held for months. Call (909) 637-3715 to schedule a site walk.
Yes, but access and staging must be planned before construction starts. A single driveway serving a rear-yard detached ADU needs to accommodate concrete trucks, material deliveries, and potentially crane placement for prefab units. We map the route, verify overhead clearances, and sequence trades so work doesn’t stall for lack of access. Tight lots near Jurupa Hills or off Limonite Avenue often require more detailed logistics planning than wide open parcels, and we price that planning into the scope upfront. Call (909) 637-3715 for a site-specific assessment.
Yes - Pedley’s summer highs routinely exceed 105°F, which pushes Title 24 energy compliance to the forefront of every design. Mechanical cooling, insulation R-values, and window performance requirements are stricter here than in milder coastal or northern Inland Empire zones. The extreme heat also makes cooled ADU rental space particularly valuable, which is why we see strong year-round demand from Pedley homeowners looking to offset high summer utility bills. We design to these requirements from the first drawing, not as a late add. Call (909) 637-3715 for a heat-specific design consultation.
No, but the panel almost certainly needs upgrading, and the windows in the new ADU must meet current Title 24 standards regardless of what the main house has. A 100-amp service cannot carry the additional load of a detached ADU with modern HVAC, appliances, and electric water heating; we typically specify a 200-amp upgrade, priced into the written quote. Single-pane windows in the main house are grandfathered, but the new ADU gets dual-pane or better. We identify these conditions during our initial site measure and include all upgrades in the scope before you sign. Call (909) 637-3715 for a free estimate.
Ready to price your project? Call (909) 637-3715 to schedule your free estimate. Every project gets a written price before any work starts, a documented photo record on every visit, and our 365-Day Done Right Promise - all under Haven Standard, in writing, before the first shovel hits the ground.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving Pedley and the Inland Empire since 2015.