ADU Design & Blueprints in San Bernardino, CA

ADU Design & Blueprints in San Bernardino, CA

ADU Design & Permitting in San Bernardino means producing a complete, city-ready permit set – architectural drawings, site plan, floor plan, elevations, and the supporting details San Bernardino’s Development Services Department requires before they’ll accept a submittal. Without a permit-quality drawing package, nothing gets approved, nothing gets built. At Ellery ADU Studio, the blueprint set isn’t a preliminary step we hand off to someone else; it’s the core deliverable that drives the entire project, from site assessment through final inspection.

Nadia Ellery founded this studio in 2015, the same year California’s ADU law began its significant shift, and we’ve produced drawings for more than 900 ADUs since then – every one paired with a written price before any work started, per Haven Standard Clause 1. If you’re searching for ADU Design & Permitting Near Me and want to understand what a complete drawing package looks like for your specific lot, call (909) 359-6463. A live person answers, no voicemail queue. This page is also the right starting point if you’ve already received a quote from another designer and want a Free Second Opinion before you commit.

Everything described here sits within our broader ADU Design & Permitting in San Bernardino service – design, blueprints, permit submittal, responses to city comments, and final sign-off are all one contract at one written price.

When You Need ADU Design & Blueprints

• You own a San Bernardino lot and want to build a new detached ADU. Before a shovel touches the ground, the city requires a stamped drawing set that documents the proposed structure’s footprint, height, setbacks, and utility connections. In San Bernardino’s older residential zones – think the grid neighborhoods north of Baseline Street or the hillside parcels near Arrowhead Country Club – lot geometry and slope create drawing complications that generic online templates can’t handle.
• You’re converting an existing garage. A garage conversion in San Bernardino still needs a full permit set: revised floor plan, electrical layout, egress window placement, insulation and ventilation details, and a site plan showing the converted space in relation to the main dwelling. We see this constantly in the Muscoy area and in older ranch-style properties near Del Rosa, where detached garages were built before current code.
• You have drawings from another designer but the city rejected the submittal. San Bernardino Development Services issues written correction letters; if yours is sitting in a folder with three or four items flagged, we can assess the gaps and either revise the existing set or redraw from scratch, depending on what’s faster.
• You’re evaluating a prefab or modular unit and need site-adapted drawings. Brands like Abodu and Mighty Buildings ship with manufacturer specs, but San Bernardino still requires a site-specific drawing set that integrates those specs with your actual lot – setback compliance, utility tie-in points, and foundation details matched to your soil conditions. We coordinate that documentation within the same contract.
• You’re refinancing or listing a property and need as-built drawings for an unpermitted structure. As-built documentation is a separate scope from a new permit set, but the drawing standards are identical. If you’re in a San Bernardino zip code where unpermitted additions from the 1970s and 1980s are common – and there are several – we see this request regularly.
• You want to build a Junior ADU inside your existing home. A JADU conversion in San Bernardino requires drawings that show the new unit’s boundaries, the shared access provisions required by California law, and the owner-occupancy covenant documentation the city records at close of permit. The drawing set for a JADU is simpler than for a new detached unit, and the price reflects that.

Our ADU Design & Blueprints Process

1. Written scope and price, before anything else. Under Haven Standard Clause 1, we give you a written price for the complete drawing package before we open a file. That price covers every sheet in the permit set – site plan, floor plans, elevations, sections, and all required details. No phased billing, no “we’ll know more once we start.” If the scope expands for a documented reason, we notify you in writing before we proceed. This is what separates a design-build studio from a designer who invoices by the hour.
2. Site documentation and existing-conditions survey. We visit the property, measure the lot, and photograph every relevant condition – existing structures, utility connection points, grade changes, easements, and anything that could affect the design. Clients receive that photo record; it’s not filed internally and forgotten. In San Bernardino, where a hillside lot in the Highland Avenue corridor can behave very differently from a flat grid lot in the Verdemont area, this step is where the drawing set gets its specificity.
3. Schematic design and client review. We produce an initial design that fits your program – number of bedrooms, square footage target, entry orientation – within the constraints your lot and San Bernardino’s zoning impose. Maximum ADU size in California is capped at 1,200 square feet for detached units; San Bernardino’s local standards layer on top of that with setback and height rules that vary by zone. We show you what’s possible within those limits and explain the trade-offs plainly, in writing.
4. Construction document production. Once the schematic is approved, we produce the full permit set: architectural floor plan at a scale the city accepts, four-sided elevations, at least one building section, a site plan with dimensions and setback callouts, and all required details (window schedule, door schedule, notes, and code references). If your project involves a prefab system – a Cover unit or a Dvele module, for example – the manufacturer’s structural documentation is incorporated into the set at this stage.
5. Plan check submittal and city coordination. We submit to San Bernardino’s Development Services Department and track the application. California’s SB 9 and AB 2221 streamlined timelines apply to most ADUs, but San Bernardino’s intake process has specific formatting requirements – sheet size, file naming, and CalGreen checklist inclusion – that we know from having submitted dozens of packages here. When the city issues correction comments, we respond in writing within the timeframe the department specifies, and we absorb that back-and-forth within the original contract price.
6. Approved permit set delivered to you, documented. When the permit issues, you receive a copy of the complete stamped set along with a documented record of the process. If construction follows through our design-build contract, those drawings are what our crews build to – and the 365-Day Done Right Promise, backed in writing before the project starts, means that if the finished ADU doesn’t match the permitted drawings, we make it right.

ADU Design & Blueprints Pricing in San Bernardino

ADU Design & Permitting Cost in San Bernardino typically run between $8,500 and $18,000 for the complete permit set, depending on unit type, square footage, and lot complexity. That range covers everything from a straightforward JADU conversion on a flat grid lot to a new detached ADU on a sloped parcel that needs drainage details and a retaining wall shown in the drawings. Every quote is written before work begins – that’s Haven Standard Clause 1, and it applies to every project without exception.

These are honest market ranges for San Bernardino. Factors that push a project toward the higher end include: unusual lot geometry, a hillside site that requires grading documentation, a design that needs a setback variance, and projects where the previous designer’s rejected drawings need to be rebuilt rather than revised. Factors that keep a project at the lower end include a flat standard lot, a straightforward unit size under 600 square feet, and a clean title with no easement complications.

San Bernardino doesn’t charge ADU permit fees for units under 750 square feet, per California Government Code Section 65852.2 – that saves some applicants several thousand dollars on the city-side fees, separate from the drawing package cost. We’ll identify your fee category in the written quote so you know the full all-in number before signing.

If you have a written estimate from another designer, we’ll review it at no charge and give you a written comparison. Call (909) 359-6463 to arrange a Free Second Opinion.

FAQs – ADU Design & Blueprints

How long does it take to get ADU blueprints approved in San Bernardino?

San Bernardino Development Services typically completes its first plan check on ADU applications within 30 to 60 days of a complete submittal, and California law requires cities to act on ADU permits within 60 days. Most projects we submit go through one or two rounds of corrections before the permit issues, which adds two to four weeks per round. Realistically, from the date we submit a clean, complete package, expect permit approval in 60 to 120 days for a straightforward project. Projects with a setback variance request or a hillside grading component run longer. We track every submittal actively and respond to correction letters within the city’s required window – that’s included in the contract, not billed separately.

Do I need an architect for ADU blueprints in San Bernardino, or will a designer do?

California law requires that plans be prepared by or under the responsible charge of a licensed architect or engineer for new detached ADUs that exceed certain thresholds, and San Bernardino’s Development Services Department enforces that requirement at intake. For a straightforward single-story detached ADU under 1,200 square feet on a standard lot, a licensed designer working under an architect’s responsible charge is typically sufficient. For two-story units, complex structural conditions, or hillside sites, a licensed structural engineer’s stamp on the structural sheets is standard practice. At Ellery ADU Studio, the responsible party and license number appear on the drawings we submit – not claimed in passing, but documented on every sheet. We’ll tell you upfront which level of licensure your project requires, and that’s reflected in the written price before we start.

Can Ellery ADU Studio design a prefab ADU for my San Bernardino property?

Yes. Prefab units from brands like Abodu and Mighty Buildings are factory-built to California standards, but San Bernardino still requires a site-specific drawing package that places the unit on your actual lot, documents the utility connections, and confirms setback compliance. We produce that site-adapted set and coordinate directly with the manufacturer to obtain the structural documentation their units ship with. The manufacturer’s drawings and the site drawings are submitted together as one package – one submittal, one plan check process. If you’ve already selected a prefab brand, bring the manufacturer’s spec sheet to your first conversation with us and we’ll tell you exactly what the site-adapted drawing set will cost.

What’s included in Ellery ADU Studio’s blueprint package – what sheets will I actually receive?

A standard Ellery permit set for a new detached ADU in San Bernardino includes: a site plan showing the lot, existing structures, the proposed ADU footprint, setback dimensions, and utility connection points; a floor plan at a scale the city’s intake desk accepts; four-sided exterior elevations showing finished heights and materials; at least one building section; a window and door schedule; a CalGreen checklist (required by California statewide); and any project-specific details – foundation type, wall assembly, egress window sizing – the design requires. For garage conversions, the set is similar but replaces the foundation sheet with documentation of the existing slab condition and the new egress provisions. Every sheet is stamped by the responsible licensed professional. You receive a copy of the complete approved set when the permit issues, along with the documented photo record of the site assessment. That’s what we mean when we say the permit set is the product.

Why San Bernardino Homeowners Work With Ellery ADU Studio

San Bernardino is not a uniform city to design ADUs in. The flat grid of older residential neighborhoods near downtown behaves differently from the foothill parcels above the 210, where slope, drainage, and soil conditions show up as real line items in the drawing package. The Verdemont area’s larger lots create opportunities for detached ADUs that smaller infill lots don’t have. Waterman Gardens and the neighborhoods around Cal State San Bernardino have a completely different mix of lot types, ownership histories, and zoning overlays. A drawing package produced for San Bernardino needs to account for these specifics, including HOA & Zoning Compliance where applicable – a template set won’t survive plan check.

Since 2015, Nadia Ellery has led this studio through more than 900 permitted ADU projects. The practice doesn’t separate the designer from the builder and then ask the client to manage the gap between them. One contract covers the drawings, the permit, and the construction. If the finished ADU isn’t built to the permitted drawings, the 365-Day Done Right Promise – committed in writing before the project starts – means we correct it. That’s not a marketing line; it’s a clause in the contract.

The full scope of what we do in San Bernardino is documented on our ADU Design & Permitting in San Bernardino page. If you’re ready to understand what a permit set for your specific lot will cost and contain, call (909) 359-6463. A written price, before any work starts – that’s how every project at Ellery ADU Studio begins.

Key Takeaways

• ADU blueprints in San Bernardino cost $8,500 to $18,000 for a complete permit set, depending on unit type and lot complexity.
• Every drawing package includes a written price before work begins, per Haven Standard Clause 1 – no hourly billing, no phased invoicing.
• San Bernardino waives ADU permit fees for units under 750 square feet; your written quote will identify your fee category.
• The permit set is the product: site plan, floor plan, four elevations, section, schedules, CalGreen checklist, and all project-specific details.
• Plan check approval in San Bernardino typically takes 60 to 120 days from a clean submittal; correction-response time is included in the contract price.
• Prefab systems from brands like Abodu and Mighty Buildings require site-adapted drawings; Ellery coordinates both the manufacturer documentation and the city submittal under one contract.
• The 365-Day Done Right Promise is in writing before construction begins – if the finished ADU doesn’t match the permitted drawings, we make it right.
• A Free Second Opinion is available on any written estimate already in hand. Call (909) 359-6463.

Written by Nadia Ellery, Owner at Ellery ADU Studio San Bernardino, serving San Bernardino since 2015.