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Backyard Studio
FAQ
Guides
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Get Started
Backyard Studio
FAQ
Guides
Login Account
Get Started
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(209) 214-6845Get Started
ModelsBackyard StudioSmall StudioLarge Studio ADU1 Bedroom ADU2 Bedroom ADUAccessible ADUCustom ProjectsAll models
How It WorksOur processOur factoryFeatures & FinishesWarrantyCheck my lot
Pricing & FinancingPricing OverviewFinancingRental & ROI
ResourcesADUs in CaliforniaADU for rental incomeADU for parentsBackyard OfficeADU GuidesGalleryFAQ
(209) 214-6845

Factory-built backyard homes and ADUs, made in California

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Models

Backyard StudioSmall StudioLarge Studio ADU1 Bedroom ADU2 Bedroom ADUAccessible ADUCustom ProjectsAll models

Pricing

Pricing OverviewFinancingRental & ROIFeatures & Finishes

Resources

ADU GuidesOur ProcessADU for rental incomeADU for parentsBackyard OfficeGalleryFAQ

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All of CaliforniaLos AngelesSan JoseSan FranciscoSan DiegoSacramentoOakland
Mon–Fri6 am – 5 pm17100 S Harlan Rd, Lathrop, CA 95330(209) 214-6845concierge@baymodular.com

HCD-approved plans #1585366 · Factory in Lathrop, CA

© 2026 Bay Modular Inc. All rights reserved. · CSLB #1112074 · HCD #1585366 · California HQ

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Free lot checkCheck my lot
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Julia from Bay ModularI read every answer

Before you go – did we miss something?

One tap helps us make this page better for the next family.

Totally fair – it’s a big decision.

Here are the numbers to take with you. All-in prices, permits to keys.

Backyard Studio120 sq ft$75,900Small Studio256 sq ft$124,900Large Studio ADU320 sq ft$154,9001 Bedroom ADU480 sq ft$214,9002 Bedroom ADU640 sq ft$271,900

Launch pricing: 30% off our published home prices through Dec 31, 2026.

See what’s included

Thanks for being honest.

Many quotes are for the building only. Ours is the whole project:

  • Design, permits and city fees
  • Site prep, foundation, delivery and crane
  • Utility hook-ups and final inspection
Find the best way to pay See what it could rent for

Let’s find out – for free.

We check zoning, setbacks, utilities and crane access, then send a fixed price for your address. About 3 days, no obligation.

Next you’ll add your contact details on our lot-check form.

Sorry about that. What were you looking for?

We’ll add it to the site – and reply if you leave an email.

We only use your email to answer. Privacy

Here’s the whole process on one page.

From a free lot check to keys in about 4–6 months, with one team.

See the 6 steps Read the FAQAsk us: (209) 214-6845

Good idea – it’s a family decision.

Send this page to the people who’ll decide with you.

Bring them on a factory tour

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What stopped you today?

We only use your email to answer. Privacy

Thank you – really.

Answers like yours shape what we build next.

Quick question before you go?One tap · 5 seconds

Bay Modularnow

Your free 7-day ADU plan

One short message a day: costs, permits, rent. Tap to start.

Free · 7 emails + occasional updates · unsubscribe anytime

You’re in! Day 1 arrives tomorrow.

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Quick Guide to Factory Built Housing

May 13, 2020

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Why We Offer Free Property Assessments and What To Expect

May 21, 2020

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Contact Us
 

Bay Modular
HCD # 1585366
(209) 214-6845

Factory Visit (by Appointment Only)
17100 S Harlan Rd
Lathrop, CA 95330

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