Permit Application in San Francisco, CA
Permit application for an ADU in San Francisco typically costs between $3,500 and $8,500 for professional preparation and submission, with city filing fees adding another $2,000 to $5,000 depending on project scope. Most complete applications take two to four weeks to assemble once we have your property details and survey in hand. At Benson ADU San Francisco, we handle the entire permit application process from initial drawings to final approval, so you never sit across from a city planner alone wondering if you said the wrong thing. Call us at (424) 328-5746 and we’ll walk you through exactly what your project needs.
Permit application is the paper-heavy, detail-obsessed middle step of any ADU Design & Permitting in San Francisco project. It sits between the fun part (picking your layout and finishes) and the satisfying part (watching walls go up). The city of San Francisco reviews ADU applications through the Department of Building Inspection, and the process involves drawings, energy calculations, structural checks, and a dozen forms that all need to say the same thing. One mismatched number between your site plan and your energy report can bounce an application back for weeks. We manage that entire stack, and we put our process in writing before we start. Most of our clients tell us the relief of not chasing the city themselves is worth every dollar.
Our owner, Troy Eastman, has guided San Francisco homeowners through permit applications for everything from garage conversions to two-story backyard units. He knows what DBI plan reviewers flag most often in this city, and he makes sure your application clears those hurdles on the first submission whenever possible. When you work with Benson ADU San Francisco, you’re working with a team that submits permits with the same transparency we bring to the rest of the build: a written price before any work starts, real-time updates on where your application sits, and a 365-Day Done Right Promise on every project we touch.
When You Need Permit Application
Not every project needs the same permit path. Some homeowners call us before they’ve closed on a property, and others call after a contractor ghosted them mid-application. Here are the situations where professional permit application makes the difference:
- You’re adding an ADU (Accessory Dwelling Unit) or JADU (Junior Accessory Dwelling Unit). These are separate living units on your property: a backyard cottage, a garage conversion, or a unit carved out of your existing home. San Francisco strongly encourages ADUs, but the paperwork still has to be right. A JADU is a smaller unit, typically under 500 square feet, built within the existing walls of your home.
- Your project changes the footprint or structural load of your home. Adding a second story, bumping out a wall, or converting a garage into living space all trigger structural review. The city wants to see calculations showing the existing foundation and framing can carry the new load.
- You’re doing electrical, plumbing, or gas work as part of the addition. Almost every ADU needs new subpanels, water lines, or gas runs. These each require separate permits or trade-specific sign-offs within your main application.
- You bought a house with unpermitted work and now you’re trying to legalize it. San Francisco properties often carry a history of handshake additions. If you’re selling, refinancing, or just want the peace of mind that your space is legal, we can help you sort out what needs retroactive permits and what can be folded into your new ADU application.
- You received a notice from the city or a stop-work order. This one’s urgent. If DBI has flagged your project, you need someone who can read the notice, determine what’s missing, and get a compliant application filed quickly. Call us at (424) 328-5746 and we’ll review it right away.
- Your previous contractor handled the design but not the permits, and now you’re stuck. We see this regularly. The drawings exist, the homeowner paid for them, but nobody ever filed with the city. We’ll audit the plans for permit readiness and take the application across the finish line.
Our Permit Application Process
We run permit application as a structured, transparent process, not a black box. Here’s exactly how it works when you hire Benson ADU San Francisco:
- Property review and scope confirmation. We start with your address, your goals for the ADU, and any drawings or surveys you already have. If you’re building with a prefab brand like Boxabl or Plant Prefab, we confirm which model you’re considering and pull their spec sheets into our permit package right away. This step usually takes one to three business days.
- Written price for the full permit application. Before any work begins, you receive a written price covering drawings coordination, form preparation, city filing fees, and plan review support. No verbal estimates that creep later. If the scope changes, the price change is in writing and approved by you first.
- Drawings and documentation assembly. We work with our design partners to produce or refine your site plan, floor plans, elevations, structural calculations, and Title 24 energy compliance reports. If you’re planning a Tuff Shed or other prefab structure, we incorporate the manufacturer’s engineered drawings into the city’s required format.
- Application submission to the San Francisco Department of Building Inspection. We file your complete package, pay the fees, and track the application through DBI’s intake system. You’ll get a submission confirmation the same day it goes in.
- Plan check follow-up and revisions. If the reviewer requests changes, we respond with the revised documents, typically within one to two weeks depending on the complexity of the comments. We keep a running log of every city communication so you can see exactly where things stand.
- Permit issuance and handoff to construction. Once the permit is issued, we deliver your stamped, approved plans and the permit card. If Benson ADU Builders is also building your project, we transition straight into construction scheduling. If you’re building with another contractor, we hand over a clean package they can start from immediately.
Throughout the process, a live person answers our phone 24/7. You won’t call a permit desk and get a voicemail loop. You’ll get one of our team members who can tell you the current status in plain English.
Permit Application Pricing in San Francisco
Let’s talk real numbers, because you deserve to know the ballpark before you tap “call.” Permit application pricing in San Francisco breaks into two buckets: the professional service to prepare and manage your application, and the city’s own filing fees. Here’s what we see across typical ADU projects in the city:
| Service Component | Typical Range |
|---|---|
| Permit application preparation and management (our service) | $3,500 – $8,500 |
| San Francisco DBI filing fees (varies by project valuation) | $2,000 – $5,000 |
| Title 24 energy compliance report | $450 – $900 |
| Structural calculations (if not included with your drawings) | $1,200 – $3,500 |
| Site survey (if you don’t have a recent one) | $2,000 – $4,500 |
| School district fees (for new square footage) | $1,000 – $4,000 |
What moves the price? Project size and scope are the big ones. A garage conversion under 500 square feet sits at the lower end. A two-story, 1,000-square-foot backyard ADU with new foundation work and a full utility upgrade sits at the higher end. The condition of your existing drawings matters too: if you’re starting from scratch, design costs fold into the permit application service. If you’re bringing drawings from a previous contractor, we audit them and quote only what’s needed to get them permit-ready.
San Francisco specifically adds layers that other Bay Area cities don’t. DBI plan review can be slower than neighboring jurisdictions, which means more follow-up hours on our side. Seismic requirements in this city are stricter given the geography, so structural calculations often require more detail. And if your property falls under any historic district overlay, expect additional review time and documentation. All of this is why a written price up front matters so much: you know what you’re paying before the city ever opens your file.
Every permit application quote from Benson ADU San Francisco includes a free estimate. Call (424) 328-5746 and we’ll give you a written number based on your specific property and project.
Why San Francisco Homeowners Choose Benson ADU San Francisco for Permits
Permit application isn’t a side service for us. It’s the front door to every build we do, and it’s the phase where most homeowner horror stories start. A contractor who says “permits are on me” and then stalls for six months is a contractor who never filed anything. When you work with Benson, you get proof at every step: submission confirmations, plan review comments, revision logs, and the final permit card. You can see the status from your phone, the same way you’d track a delivery.
We also bring something most permit expediters can’t: we’re builders. We know that a plan detail the city accepts on paper can still be a headache in the field, so we catch those conflicts before they hit the plan checker’s desk. If you’re building with a prefab system from Boxabl, Plant Prefab, or Tuff Shed, we know how to package the manufacturer’s engineering documents so DBI accepts them without extra rounds of comments. And when the finish materials matter, James Hardie cladding is one of the most common exterior choices we specify on San Francisco ADUs, both for its fire resistance and its fit with the city’s existing housing stock.
Benson ADU San Francisco is part of the Relay Home Co. family, founded in 2006. Every permit application and construction project we take on is governed by The Relay Visibility Guarantee: a written price before work starts, real-time tracking, a 365-Day Done Right Promise, a written guarantee on every project, and a free second visit if any covered repair fails. Our technicians are background-checked and uniformed, so when someone shows up to measure your garage or stake your property lines, you know exactly who they are.
FAQs – Permit Application in San Francisco
How long does ADU permit approval take in San Francisco?
In San Francisco, ADU permit approval typically takes three to six months from submission to issuance, depending on DBI’s current review backlog and how many plan check comments your project receives. Prefab projects using manufacturers like Boxabl or Plant Prefab sometimes move faster because the engineering documentation is already standardized. The best thing you can do to shorten the timeline is submit a complete, consistent application the first time. Call (424) 328-5746 and we’ll give you a realistic timeline for your specific project.
Can I apply for an ADU permit myself in San Francisco?
Yes, homeowners can file their own ADU permit applications with DBI, and San Francisco’s ADU rules are designed to be friendlier than those in many neighboring cities. The person preparing the drawings must meet the city’s requirements, and you’ll need to produce a complete package that covers planning, structural, energy, and utility documentation. Most homeowners who try it end up spending months navigating plan check comments, and a significant percentage eventually hire a professional to respond to the reviewer. If you want to try it yourself, we’re happy to answer questions; if you want it handled, we’re here.
What happens if my permit application gets rejected?
A permit application in San Francisco rarely gets rejected outright; instead, DBI issues plan check comments requesting corrections or additional information. You respond to those comments with revised documents, and the application continues through review. We track every comment and respond methodically, which is why most of our applications clear plan check with minimal back and forth. If you’re dealing with comments on an existing application, call us and we’ll review the full comment letter with you.
Is it cheaper to handle permits through a design-build company or a separate permit expediter?
Using a design-build company like Benson ADU San Francisco usually costs about the same as hiring a separate expediter, and you get better coordination because the same team performs the design, permitting, and construction. A standalone expediter charges $2,000 to $6,000 for application management, but they don’t know your build details the way a builder does, and they can’t fix drawings that don’t meet field conditions. If you’re comparing quotes, ask both parties whether their number includes plan check responses or just the initial submission. Our written permit application quotes include the full process from submission to permit issuance, with plan check revisions covered.
Do I need permits for a prefab ADU like Boxabl or Tuff Shed in San Francisco?
Yes. Even fully factory-built units like Boxabl and Plant Prefab models, and even accessory structures like Tuff Shed backyard studios, require permits when they’re used as dwelling units or connected to utilities. The manufacturer’s engineering documents help the application along, but the city still reviews site placement, foundation design, utility connections, and local code compliance. We handle that entire package and coordinate with the manufacturer’s technical team when needed. Call (424) 328-5746 for a free permit consultation on your prefab project.
Get Your ADU Permit Application Started
If you’re planning an ADU in San Francisco, the permit application is the step that separates projects that break ground from projects that stall out in a filing cabinet. Benson ADU San Francisco gives you a written price before we start, real-time status updates while the city reviews, and a 365-Day Done Right Promise on the entire project. You’ll know exactly what you’re paying, exactly where your application stands, and exactly what happens next.
Call us at (424) 328-5746 for a free estimate on your ADU permit application in San Francisco. A live person answers, day or night. We’ll walk you through the scope, give you a written number, and you can decide if it’s the right fit. No pressure, no vague ranges, no phone tag. Just a straight answer, in writing, from a builder who knows this city’s permit process inside and out.
Written by Troy Eastman, Owner at Benson ADU San Francisco, serving San Francisco.
