Practical guides to ADU cost, financing, permits, and building in California, from the family that builds them in Salinas.https://frameworkfirst.com/en-ushttps://frameworkfirst.com/blog/can-i-build-an-adu-in-a-coastal-zone/https://frameworkfirst.com/blog/can-i-build-an-adu-in-a-coastal-zone/Yes, you can generally build an ADU in California's Coastal Zone, but expect an added coastal development review on top of the standard ADU permit. Here's how it works.Tue, 08 Sep 2026 00:00:00 GMTPermitscoastal zoneadu permitscalifornia adu lawcoastal development permitpermit timelineFramework Firsthttps://frameworkfirst.com/blog/can-i-build-two-adus-on-my-lot/https://frameworkfirst.com/blog/can-i-build-two-adus-on-my-lot/On a single-family lot, California law generally allows one ADU plus one JADU, not two full ADUs. Here's how the state's unit-count rules actually work, and what changes on a multifamily lot.Tue, 08 Sep 2026 00:00:00 GMTPermitsadu lawjadupermitscalifornia adulot rulesFramework Firsthttps://frameworkfirst.com/blog/can-an-adu-have-a-garage/https://frameworkfirst.com/blog/can-an-adu-have-a-garage/Yes, an ADU can include a garage, but California's ADU parking exemptions mean most homeowners don't need one. Here's how the tradeoff actually works.Mon, 07 Sep 2026 00:00:00 GMTBuying Guideadu designadu parkingcalifornia adu lawsbuying guideFramework Firsthttps://frameworkfirst.com/blog/can-i-build-an-adu-on-a-flag-lot/https://frameworkfirst.com/blog/can-i-build-an-adu-on-a-flag-lot/Yes, ADUs are often possible on flag lots. Here's how the narrow access driveway affects factory-built delivery and what a feasibility study checks first.Mon, 07 Sep 2026 00:00:00 GMTPermitsflag lotsadu accesspermitsdelivery logisticscalifornia adu lawFramework Firsthttps://frameworkfirst.com/blog/can-an-adu-be-bigger-than-the-main-house/https://frameworkfirst.com/blog/can-an-adu-be-bigger-than-the-main-house/In most California cities, no. ADUs are generally required to stay subordinate in size to the primary residence, on top of the state's flat 1,200 sq ft cap. Here's how that rule works.Sun, 06 Sep 2026 00:00:00 GMTPermitsadu size limitsadu permitscalifornia adu lawsubordinate aduadu regulationsFramework Firsthttps://frameworkfirst.com/blog/can-i-airbnb-my-adu-in-california/https://frameworkfirst.com/blog/can-i-airbnb-my-adu-in-california/Short-term rental rules for ADUs vary by city and county in California. Here's how to find out what applies to your property before you plan an Airbnb strategy.Sun, 06 Sep 2026 00:00:00 GMTPermitsadu rentalsshort-term rentalairbnbadu permitscalifornia adu lawFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-small-lots/https://frameworkfirst.com/blog/best-adu-for-small-lots/Not every backyard has room for a big footprint. See which Framework First models fit the tightest lots, ranked by actual footprint dimensions.Sat, 05 Sep 2026 00:00:00 GMTBuying Guidebest adu for a small lotsmall lot aducompact aducalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-two-bedroom-adu/https://frameworkfirst.com/blog/best-two-bedroom-adu/Framework First builds six different two-bedroom ADU configurations. See how they compare on size, price, and layout to find the right fit.Sat, 05 Sep 2026 00:00:00 GMTBuying Guidebest two bedroom adu2 bedroom adutwo bedroom aducalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-multigenerational-living/https://frameworkfirst.com/blog/best-adu-for-multigenerational-living/Multigenerational households need more than one bedroom and real separation. See which Framework First models fit two households best, priced and specced.Fri, 04 Sep 2026 00:00:00 GMTBuying Guidebest adu for multigenerational livingmultigenerationaltwo householdscalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-rental-income/https://frameworkfirst.com/blog/best-adu-for-rental-income/The Six Sixty 2BR is our top pick for rental income: two bedrooms in a 660 sq ft footprint. See how it compares to our other strong rental layouts, priced and specced.Fri, 04 Sep 2026 00:00:00 GMTBuying Guidebest adu for rental incomeadu investmentrental aducalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-first-time-investors/https://frameworkfirst.com/blog/best-adu-for-first-time-investors/First-time ADU investors want the strongest return for the least risk. See which Framework First model gives the best rent-to-cost ratio to start with.Thu, 03 Sep 2026 00:00:00 GMTBuying Guidebest adu for first time investorsadu investmentrental aducalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-guests/https://frameworkfirst.com/blog/best-adu-for-guests/A guest house ADU should feel generous without being oversized. See which Framework First model is the best fit for hosting family and friends.Thu, 03 Sep 2026 00:00:00 GMTBuying Guidebest guest house aduguest houseguest aducalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-aging-in-place/https://frameworkfirst.com/blog/best-adu-for-aging-in-place/Aging in place means single-level living with no stairs and everything within easy reach. See which Framework First model fits best.Wed, 02 Sep 2026 00:00:00 GMTBuying Guidebest adu for aging in placeaging in placesingle story aducalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-aging-parents/https://frameworkfirst.com/blog/best-adu-for-aging-parents/Which Framework First model fits an aging parent best: single-story living, easy layout, privacy for two households. Top picks, priced and specced.Wed, 02 Sep 2026 00:00:00 GMTBuying Guidebest adu for aging parentsin-law suitemultigenerationalcalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-a-home-office/https://frameworkfirst.com/blog/best-adu-for-a-home-office/A backyard office ADU should be efficient, quiet, and affordable, not a full second home. See which compact model fits best as a home office.Tue, 01 Sep 2026 00:00:00 GMTBuying Guidebest adu for a home officebackyard officehome office aducalifornia aduFramework Firsthttps://frameworkfirst.com/blog/best-adu-for-adult-children/https://frameworkfirst.com/blog/best-adu-for-adult-children/An ADU for a grown child needs independence: their own kitchen, their own door, and room to actually live. See the top Framework First picks.Tue, 01 Sep 2026 00:00:00 GMTBuying Guidebest adu for adult childrenadult children aduboomerang kidscalifornia aduFramework Firsthttps://frameworkfirst.com/blog/adu-vs-moving-which-is-cheaper/https://frameworkfirst.com/blog/adu-vs-moving-which-is-cheaper/A plain-language cost comparison of building an ADU versus selling and moving, covering realtor commissions, closing costs, mortgage rates, and the disruption of leaving your neighborhood.Mon, 31 Aug 2026 00:00:00 GMTPricingadu vs movingcost comparisonadu pricingreal estatebuying guideFramework Firsthttps://frameworkfirst.com/blog/are-prefab-adus-good-quality/https://frameworkfirst.com/blog/are-prefab-adus-good-quality/Prefab ADU quality depends on the builder, not the method. Here's what actually determines whether a factory-built ADU holds up, and what to check before you buy.Mon, 31 Aug 2026 00:00:00 GMTBuying Guideprefab adumodular constructionadu qualitybuying guideFramework Firsthttps://frameworkfirst.com/blog/adu-title-24-energy-requirements/https://frameworkfirst.com/blog/adu-title-24-energy-requirements/California's Title 24 sets efficiency standards for insulation, windows, and HVAC on new ADUs, and is related to (but separate from) the solar mandate. Here is what it means for your build.Sun, 30 Aug 2026 00:00:00 GMTPermitstitle 24energy codeadu permitssolar requirementscalifornia building codeFramework Firsthttps://frameworkfirst.com/blog/adu-rental-agreement-basics-california/https://frameworkfirst.com/blog/adu-rental-agreement-basics-california/Yes, an ADU rental needs a written lease, and California's standard landlord-tenant laws apply. Here's what to cover and why improvising a lease is a bad idea.Sat, 29 Aug 2026 00:00:00 GMTBuying Guideadu rental agreementadu leasecalifornia landlord tenant lawadu rental incomeadu tenantFramework Firsthttps://frameworkfirst.com/blog/adu-septic-system-requirements/https://frameworkfirst.com/blog/adu-septic-system-requirements/If your property runs on septic instead of sewer, your ADU's wastewater load usually needs to be evaluated first. Here's what that means and how to check.Sat, 29 Aug 2026 00:00:00 GMTPermitsadu septic systemseptic requirementsadu permitscalifornia adu lawsfeasibility studyFramework Firsthttps://frameworkfirst.com/blog/adu-loan-rates-2026/https://frameworkfirst.com/blog/adu-loan-rates-2026/ADU loan rates are not one number. What you pay depends on the loan type, your credit and equity position, and the broader rate environment.Fri, 28 Aug 2026 00:00:00 GMTFinancingadu loan ratesadu financinginterest ratescalifornia aduFramework Firsthttps://frameworkfirst.com/blog/adu-lot-coverage-rules/https://frameworkfirst.com/blog/adu-lot-coverage-rules/Lot coverage limits the percentage of a lot that structures can cover. In California, if a city's lot coverage rule would block an 800 sq ft ADU, it must yield.Fri, 28 Aug 2026 00:00:00 GMTPermitsadu lot coveragecalifornia adu lawsadu permitsadu zoningadu size limitsFramework Firsthttps://frameworkfirst.com/blog/adu-impact-fees-explained/https://frameworkfirst.com/blog/adu-impact-fees-explained/How California's ADU impact fee rules actually work: waived entirely under 750 square feet, proportional to your primary home at 750 sq ft and up, and why that's a separate question from your local building permit fees.Thu, 27 Aug 2026 00:00:00 GMTPermitsadu impact feespermitscalifornia adu lawschool feestraffic feesFramework Firsthttps://frameworkfirst.com/blog/adu-insurance-what-changes/https://frameworkfirst.com/blog/adu-insurance-what-changes/Building an ADU adds insurable value to your property, which means your homeowner's policy usually needs an update, and a rented ADU may need landlord coverage. Here's what to expect.Thu, 27 Aug 2026 00:00:00 GMTBuying Guideadu insurancehomeowners insurancelandlord insuranceadu rentalproperty coverageFramework Firsthttps://frameworkfirst.com/blog/adu-electrical-panel-upgrade-requirements/https://frameworkfirst.com/blog/adu-electrical-panel-upgrade-requirements/Does building an ADU mean upgrading your home's electrical panel? Here's how the decision gets made, who makes it, and what to expect during planning.Wed, 26 Aug 2026 00:00:00 GMTProcesselectrical paneladu constructionpermitsutilitiesprocessFramework Firsthttps://frameworkfirst.com/blog/adu-financing-for-retirees/https://frameworkfirst.com/blog/adu-financing-for-retirees/Retirees on a fixed income face different financing questions than working homeowners. Here are the main paths retirees use to fund an ADU, and where to get real guidance.Wed, 26 Aug 2026 00:00:00 GMTFinancingadu financingretireesreverse mortgagecalifornia aduFramework Firsthttps://frameworkfirst.com/blog/adu-ceiling-height-requirements/https://frameworkfirst.com/blog/adu-ceiling-height-requirements/California's building code generally requires at least 7 ft of ceiling height in habitable ADU space, with bedrooms sometimes needing 7 ft 6 in. Here's how it works.Tue, 25 Aug 2026 00:00:00 GMTPermitsadu ceiling heightadu building codesadu permitscalifornia adu lawsFramework Firsthttps://frameworkfirst.com/blog/adu-construction-loan-guide/https://frameworkfirst.com/blog/adu-construction-loan-guide/A construction-to-permanent loan funds an ADU build in stages, then converts into a regular mortgage once the home is done. Here's how it actually works.Tue, 25 Aug 2026 00:00:00 GMTFinancingconstruction loanadu financingconstruction to permanentcalifornia aduFramework Firsthttps://frameworkfirst.com/blog/how-long-does-it-take-to-build-an-adu/https://frameworkfirst.com/blog/how-long-does-it-take-to-build-an-adu/A realistic ADU build timeline for California, from first call to move-in. Why factory-built homes finish in 4 to 9 months while site-built takes 16 to 24, broken down week by week.Mon, 24 Aug 2026 00:00:00 GMTProcessadu timelineprocesscaliforniaprefabFramework Firsthttps://frameworkfirst.com/blog/prefab-vs-site-built-adu/https://frameworkfirst.com/blog/prefab-vs-site-built-adu/An honest comparison of prefab/modular ADUs versus site-built construction, cost, timeline, quality, and disruption, so you can choose the right path for your property.Mon, 24 Aug 2026 00:00:00 GMTBuying Guideprefab adumodularsite-builtcomparisonFramework Firsthttps://frameworkfirst.com/blog/adu-for-adult-children/https://frameworkfirst.com/blog/adu-for-adult-children/An ADU for adult children keeps your kids close and housed for $180,000 to $557,000, permitting budget included. See which models fit, real costs, and how to pay for it.Sun, 23 Aug 2026 00:00:00 GMTBuying GuideADU for adult childrenmultigenerationalADU costADU financingCalifornia ADUFramework Firsthttps://frameworkfirst.com/blog/adu-for-rental-income-california/https://frameworkfirst.com/blog/adu-for-rental-income-california/Building an ADU for rental income in California? See which models rent best, our all-in pricing with the permitting budget included, and how to run the ROI numbers before you build.Sun, 23 Aug 2026 00:00:00 GMTBuying GuideADU rental incomeADU ROIrental propertyADU investmentCalifornia ADUFramework Firsthttps://frameworkfirst.com/blog/adu-vs-guest-house/https://frameworkfirst.com/blog/adu-vs-guest-house/ADU vs. guest house explained: what legally makes a backyard structure an ADU in California, why a guest house without its own kitchen and bath may not qualify, and why building to full ADU standards usually pays off.Sun, 23 Aug 2026 00:00:00 GMTComparisonsadu vs guest houseguest housecalifornia adu lawcompanion unitaduFramework Firsthttps://frameworkfirst.com/blog/adu-vs-home-addition/https://frameworkfirst.com/blog/adu-vs-home-addition/Side-by-side comparison of ADUs vs home additions in California, costs, build times, rental potential, property value impact, and a decision framework for which is right for your goal.Sun, 23 Aug 2026 00:00:00 GMTBuying Guideadu vs additionhome additioncomparisonrenovationFramework Firsthttps://frameworkfirst.com/blog/can-an-adu-be-built-over-a-garage/https://frameworkfirst.com/blog/can-an-adu-be-built-over-a-garage/Yes, in many California cities you can build an ADU above an existing or new garage. Here's how it works, what it usually requires, and how it differs from a single-story factory-built ADU.Sun, 23 Aug 2026 00:00:00 GMTBuying Guideadu designgarage conversionsite-built aducalifornia adu lawprefab aduFramework Firsthttps://frameworkfirst.com/blog/can-an-adu-be-two-stories/https://frameworkfirst.com/blog/can-an-adu-be-two-stories/Yes, California ADU law leaves enough height for two stories in many cases. Here's what the state guarantees, what local zoning still controls, and why Framework First builds single story.Sun, 23 Aug 2026 00:00:00 GMTPermitsadu heightadu designcalifornia adu lawstwo story aduadu permitsFramework Firsthttps://frameworkfirst.com/blog/does-an-adu-need-its-own-address/https://frameworkfirst.com/blog/does-an-adu-need-its-own-address/Many California cities assign a separate address to a detached ADU for mail, utilities, and emergency response, but the exact rule is set locally, not by state ADU law. Here's how it works.Sun, 23 Aug 2026 00:00:00 GMTProcessadu addressadu addressingadu permitsadu utilitiesemergency responseFramework Firsthttps://frameworkfirst.com/blog/how-to-finance-an-adu-without-cash/https://frameworkfirst.com/blog/how-to-finance-an-adu-without-cash/Four practical ways to finance a California ADU when you don't have $200K+ in liquid cash, HELOC, construction-to-permanent loan, cash-out refi, and specialized ADU lenders. Pros, cons, and the math.Sun, 23 Aug 2026 00:00:00 GMTFinancingadu financinghelocconstruction loancash out refiFramework Firsthttps://frameworkfirst.com/blog/modular-vs-stick-built-adu/https://frameworkfirst.com/blog/modular-vs-stick-built-adu/Modular vs. stick-built ADU construction compared in depth: build timeline, weather and quality risk, permitting differences, and cost predictability.Sun, 23 Aug 2026 00:00:00 GMTComparisonsmodular adustick-built aduadu constructioncomparisonFramework Firsthttps://frameworkfirst.com/blog/what-is-a-detached-adu/https://frameworkfirst.com/blog/what-is-a-detached-adu/A detached ADU is a freestanding, separate home built on the same lot as your house. Here's exactly what makes it different from an attached ADU or a JADU.Sun, 23 Aug 2026 00:00:00 GMTBuying Guidedetached aduadu basicsaccessory dwelling unitjaduprefab aduFramework Firsthttps://frameworkfirst.com/blog/what-is-a-prefab-adu/https://frameworkfirst.com/blog/what-is-a-prefab-adu/A prefab ADU is built largely off-site in a factory, then transported and installed on a permanent foundation. Here's exactly what that means, and how it differs from a manufactured home.Sun, 23 Aug 2026 00:00:00 GMTBuying Guideprefab adufactory-builtmodular constructionmanufactured homesbuying guideFramework Firsthttps://frameworkfirst.com/blog/what-is-an-attached-adu/https://frameworkfirst.com/blog/what-is-an-attached-adu/An attached ADU shares a wall or is directly connected to the main house, unlike a detached ADU or a JADU. Here's how it works, its height allowance, and the trade-offs.Sun, 23 Aug 2026 00:00:00 GMTBuying Guideattached aduadu typescalifornia adu lawbuying guideFramework Firsthttps://frameworkfirst.com/blog/prefab-adu-vs-manufactured-home/https://frameworkfirst.com/blog/prefab-adu-vs-manufactured-home/Prefab ADU vs. manufactured home explained for California backyard builds: HUD code vs. California Building Code, financing, appraisal, and how each is regulated as an ADU.Sat, 22 Aug 2026 00:00:00 GMTComparisonsprefab adumanufactured homehud codecalifornia building codeadu financingFramework Firsthttps://frameworkfirst.com/blog/prefab-vs-modular-vs-manufactured-homes/https://frameworkfirst.com/blog/prefab-vs-modular-vs-manufactured-homes/Prefab vs modular vs manufactured: modular is built to the same local code as a site-built home, manufactured to a federal HUD standard. Here is the real difference.Sat, 22 Aug 2026 00:00:00 GMTBuying Guidemodular homesmanufactured homesprefabADUbuying guideFramework Firsthttps://frameworkfirst.com/blog/adu-construction-methods-compared/https://frameworkfirst.com/blog/adu-construction-methods-compared/Prefab, modular, panelized, stick-built, and kit ADUs compared honestly: timeline, weather risk, quality consistency, cost, and disruption for each method.Thu, 20 Aug 2026 00:00:00 GMTComparisonsadu construction methodsprefab adumodular adupanelized adustick-built adukit homesFramework Firsthttps://frameworkfirst.com/blog/types-of-adus/https://frameworkfirst.com/blog/types-of-adus/Detached, attached, JADU, garage conversion, above-garage, and basement conversion. What each type of ADU actually is, real cost and complexity tradeoffs, and which one fits your lot.Wed, 19 Aug 2026 00:00:00 GMTBuying Guideadu typesdetached aduattached adujadugarage conversionbuying guideFramework Firsthttps://frameworkfirst.com/blog/what-is-an-adu/https://frameworkfirst.com/blog/what-is-an-adu/An ADU is a secondary, independent home on a single-family lot, with its own kitchen, bath, and entrance. What one actually is, the California laws behind it, the types, typical size and cost, and how Framework First builds them.Wed, 19 Aug 2026 00:00:00 GMTBuying Guidewhat is an aduadu basicsaccessory dwelling unitadu typesbuying guideFramework Firsthttps://frameworkfirst.com/blog/how-is-an-adu-built/https://frameworkfirst.com/blog/how-is-an-adu-built/Inside how a Framework First ADU is built, 97% in a climate-controlled Salinas factory, crane-delivered in one day. Materials, quality control, and what makes factory-built homes stronger than site-built.Sun, 02 Aug 2026 00:00:00 GMTProcesshow adus are builtfactory builtmodular construction2x6 wallsFramework Firsthttps://frameworkfirst.com/blog/adu-grant-programs-california/https://frameworkfirst.com/blog/adu-grant-programs-california/California has offered ADU grant funding before, but availability changes. Here's the honest, current picture before you plan your budget.Sat, 01 Aug 2026 00:00:00 GMTFinancingadu grantscalhfaadu financingcalifornia aduFramework First