Multigenerational housing demand in the Conejo Valley has grown faster than the supply that fits it. I get the call almost every week - a buyer with aging parents, an adult child returning home, or an extended family that wants to consolidate households. The good news: the product exists. The harder news: it is concentrated in a handful of floor-plan types, a few specific resale segments, and a small number of older neighborhoods with grandfathered in-law units. I am Brian Cooper, REALTOR at eXp Realty (DRE# 01434286). This guide is the working map I use when a multigen buyer calls - what to look for, what to verify, and where each product type actually exists in the Conejo Valley in May 2026.
What multigenerational housing looks like in 2026
The category has matured in the last decade. In 2015, multigenerational shopping in the Conejo Valley meant either a big custom home with a converted guest wing or a duplex - and duplexes are rare in single-family-zoned 91361 / 91320 / 91362 / 93010. Today, the toolkit is wider. Lennar introduced the Next Gen floor plan nationally in 2011 and rolled it into select Ventura County tracts starting in 2017. Other production builders (Pardee, Toll Brothers, Standard Pacific legacy designs) added similar in-suite options through 2020-2024. The ADU regulatory wave (covered in my ADU guide) opened the resale market for properties retrofitted with detached secondary units.
What this means in May 2026: a buyer looking for a multigen-ready home in the Conejo Valley has 25-40 active listings to choose from on any given week across the four categories. That is a 4x increase from 2018 inventory but still thin against demand - these listings typically sell in 18-32 days, faster than the broader market median of 31-40 days, and often above list when the secondary unit is well-built and permitted.
The premium for a multigen-ready property over a comparable single-family home is real - typically 8-18% in the current market. That premium is lower than the construction cost of an ADU built fresh ($240K-$340K on top of the base price), which is why ADU-equipped resales trade efficiently. It is also lower than the cost of any separate-household alternative - buying a second home, supporting a parent in assisted living, etc.
Category 1 - Lennar Next Gen and similar builder floor plans
The Lennar Next Gen Home is a single-family floor plan with a fully self-contained attached suite. Typical configuration: 4-5 bed main home, plus an attached suite of 600-1,000 sq ft with its own exterior entry, living room, kitchenette or full kitchen, full bath, bedroom, and laundry. Lennar pioneered the configuration nationally; other builders have rolled out comparable designs under different names (Toll Brothers calls them 'second master' plans, Pardee uses 'casita' for some configurations).
Where Next Gen and similar floor plans exist in the Conejo Valley / Ventura County footprint: Lennar built Next Gen units in Camarillo (Mission Oaks expansion phases 2017-2019) and a small number of east Thousand Oaks infill projects. Toll Brothers second-master plans appear occasionally in their Moorpark and Camarillo tracts. Pardee casita-configuration homes appear in Serenata Moorpark. Total original Next Gen and equivalent inventory across the area: approximately 180-220 homes.
Resale availability in May 2026: thin but consistent. I typically see 3-6 active Next Gen or equivalent listings at any given time across the Conejo Valley and Camarillo together. Price premium over a comparable non-Next-Gen home in the same tract runs 8-15%. The advantage: the suite is original construction, permitted, attached (which means shared HVAC and shared mailing address are typically established), and designed as a self-contained living space from day one.
Category 2 - Homes with detached guest house
Detached guest houses pre-date the modern ADU regulatory framework. In the Conejo Valley, they exist primarily on larger custom-built lots - half-acre to two-acre parcels in North Ranch, parts of Lake Sherwood (unincorporated), Hidden Hills (technically LA County but functionally Conejo-adjacent), and the older Westlake hillside tracts. The detached structure is typically 600-1,400 sq ft, was permitted as a guest house (not always with a full kitchen, depending on the era of construction), and is set back 20-40 ft from the main home.
The advantages over an attached unit: full privacy (separate building, separate entries, often separate yards), often a separate driveway, and typically larger than an attached suite. The disadvantage: older guest houses sometimes have permit gaps - the structure was built as a 'studio' or 'pool house' and later converted to a sleeping unit without re-permitting. Verification of permit status and current kitchen permit is step one on every detached-guest-house tour.
Resale availability in May 2026: approximately 9 active listings across the Conejo Valley with permitted detached guest houses. Price premium over the equivalent home without a guest house runs 10-20%, which makes these the highest-premium category - but they also sit on the largest lots, which is part of the value. Days on market for detached-guest-house listings averages 22 days in 2025-2026, faster than the broader market.
Category 3 - ADU-equipped resales
ADU-equipped resales are the fastest-growing multigen category in the Conejo Valley and Camarillo. The category did not meaningfully exist before 2020 - the ADU regulatory environment was still permissive enough to be uncommon, and the construction wave of 2020-2024 is now showing up in resale inventory as those homeowners cycle. May 2026 inventory: approximately 18 active ADU-equipped resales across Thousand Oaks, Westlake Village, Newbury Park, Agoura Hills, and Camarillo.
Typical configuration: 3-5 bed main home (existing for 20-40 years in most cases) plus a permitted detached ADU of 600-900 sq ft built in 2021-2025. The ADU is usually located in the rear or side yard, with its own entry, kitchen, bath, and bedroom. Some have separate utility meters; many share with documented split agreements.
The advantage of this category for multigen buyers: the ADU is brand-new construction, code-compliant under the modern ADU statute, and the premium over the same home without an ADU is typically less than what it would cost to build the same ADU yourself ($90K-$180K premium versus $240K-$340K construction cost). The math favors buying an ADU-equipped resale over buying a non-ADU home and building.
Category 4 - Older homes with grandfathered in-law units
Some older neighborhoods in the area have homes with grandfathered in-law units - permitted secondary dwelling units that pre-date the modern ADU regulatory framework but enjoy legal status because they were permitted under the rules in effect at construction. The two clearest concentrations: Strathearn / Old Town Simi Valley (homes built 1950s-1970s with attached or detached in-law studios) and Old Town Camarillo (similar era homes with garage-conversion in-law units permitted under pre-1995 county rules).
Inventory in this category is thin - maybe 4-7 listings active at any given time across Strathearn and Old Town Camarillo combined, plus occasional central-Thousand-Oaks examples on the original 1960s-built tracts. The value proposition: these properties usually trade at a discount to comparable newer multigen options because the housing stock itself is older. Buyer plans usually include some renovation of both the main home and the in-law unit, which is the right scope for the price point.
Permit verification is critical here too - 'grandfathered' is a real status only if the original permit can be documented. Cities are usually helpful in pulling historical building permits. If permits cannot be found, the unit may need to be legalized as an ADU under current rules (which is usually possible but requires upgrading to current code, running $20K-$60K depending on the gap).
The four categories side by side
The table below summarizes the four categories on the dimensions that matter most for buyer decision-making: typical inventory, typical price premium over comparable single-family, age of the secondary unit, and the most common location pattern within the Conejo Valley / Camarillo area.
Reading the table - inventory counts reflect a May 2026 snapshot and rotate weekly as listings come on and go pending. The premium ranges are mid-market estimates and individual sales vary widely based on lot, build quality, and the buyer pool active at the time of sale. The location notes are the highest-concentration areas, not the only places the category exists. Use the table to narrow the conversation, then run the specific property analysis once a candidate listing appears.
| Category | Active inventory (May 2026) | Premium vs SFR | Where it exists |
|---|---|---|---|
| Next Gen / similar builder | 3-6 listings | 8-15% | Camarillo Mission Oaks, east TO infill, Serenata Moorpark |
| Detached guest house | approx 9 listings | 10-20% | North Ranch, Lake Sherwood, Hidden Hills-adjacent, Westlake hills |
| ADU-equipped resale | approx 18 listings | 8-18% | Across TO, Westlake, Newbury Park, Agoura, Camarillo, Moorpark |
| Grandfathered in-law unit | 4-7 listings | 5-12% | Strathearn Simi, Old Town Camarillo, central TO 1960s tracts |
Common scenarios - what I see at the kitchen table
Pattern 1: married couple in their 50s buying for themselves plus an aging parent. Usually prioritize single-level access for the parent's unit (no stairs to entry, no stairs within the suite). Lennar Next Gen and well-designed detached ADUs both work; some older in-law units require modification. Budget typically $1.4M-$2.2M depending on which Conejo sub-area. Tour shortlist usually includes 2-3 ADU-equipped resales plus 1-2 Next Gen options.
Pattern 2: extended family buying together (two adult households, sometimes with children). Prioritize equal-size or near-equal units, ideally with separate addresses or at minimum separate entries and full kitchens. Detached guest house listings and some larger Next Gen configurations work; older in-law units rarely work because the secondary unit is too small. Budget typically $2.0M-$3.5M.
Pattern 3: working-age couple buying with a plan to host an aging parent later. The parent is not moving in yet. The strategy: buy a home with permitted ADU now to lock in the option, rent the ADU for income in the interim (4-7 years typically), then transition to parent occupancy when needed. This is the math-strongest path - the rental income during the interim covers a meaningful chunk of the ADU premium.
Pattern 4: adult-child-returning. Often a buyer in their 60s with a 20s/30s child who needs separate space but not separate finances. Smaller secondary units work fine - JADU conversion of an existing home or a smaller Next Gen suite. Budget can be much lower because the secondary unit does not need to be as fully self-contained.
Inspection and due-diligence items for multigen properties
The diligence list on a multigen property is longer than on a single-family home. The single biggest item is permit verification on the secondary unit - covered above. Beyond that, the specific items I work through on every multigen tour: separately metered or sub-metered utilities (water, gas, electric), HVAC zoning (does the secondary unit have its own thermostat or share with the main), kitchen permit status (some in-law units have kitchenettes that exceed the permitted configuration), and any easement or shared-access concerns if the secondary unit has a driveway or path.
Accessibility considerations matter when the multigen use case includes an aging parent. I walk every property thinking about entry-level living (can the secondary occupant enter, sleep, bathe, and prepare a meal without using stairs?), bathroom layout (room for grab bars, walk-in shower vs tub-only), and hallway widths (32 in clear minimum for future mobility aids). These are not technical inspection items, they are buyer-fit items - but they kill more multigen purchases than permit issues do.
Insurance gets specific. A detached secondary structure needs to be on the policy. If the secondary unit will be rented (even informally, even to family with rent payment), the policy may need a landlord rider. Some carriers will write a multigen / two-unit-on-one-APN policy more easily than others. Get a binder quote before contingency removal, not after.
- Permit status on the secondary unit (modern ADU or grandfathered)
- Single-level access path from street to bed/bath/kitchen in secondary unit
- Bathroom modifiability (32 in door, room for grab bars)
- Hallway widths in secondary unit (32 in clear minimum)
- Separately metered or sub-metered utilities
- Independent HVAC zoning
- Separate or shared mailing address
- Insurance binder confirmed before contingency removal
Financing nuances for multigen purchases
Standard conforming and jumbo loans treat a single-family home with an attached or detached ADU as a single-unit property - which keeps the loan category simple and the rate identical to a non-ADU purchase. That is the common case. If the property is technically a 2-4 unit property (rare for modern ADU homes but possible for some older converted properties), the loan is a multi-unit loan with different rates and down-payment requirements.
Rental income from the secondary unit can sometimes count toward qualifying income, depending on the loan type and the documentation. Fannie Mae and Freddie Mac allow ADU rental income to be counted under specific guidelines (typically requires 75% of documented market rent or 75% of lease amount, plus 12-24 months landlord experience or alternative documentation). FHA and VA loans allow similar but with their own rules. Talk to the lender about ADU income before assuming you can use it.
What I tell clients
Three things on every multigen call. First: get specific about the use case. 'Multigen' covers four different buyer profiles (aging parent, adult child, extended family, future-flexibility) and each one points to different inventory and a different budget. Define yours before we tour. Second: verify permits on every secondary unit before contingency removal. Always. Unpermitted secondary units have killed value for clients I have talked to after the fact, and the discount for buying an unpermitted configuration is rarely as good as it looks at the time. Third: do not assume the right property is on the market this week. Multigen inventory is thin and timing matters - I keep a watch list and reach out when something fits.
The good news: the category is growing. Five years from now there will be 2-3x the ADU-equipped resale inventory there is today as the 2020-2024 construction wave continues to cycle through ownership. If the right property is not on the market now, waiting 6-12 months often produces a much better short list - assuming the family timeline allows.
Frequently Asked Questions
What is a Lennar Next Gen home and where can I find them in the Conejo Valley?
Lennar Next Gen is a builder floor plan with an attached self-contained secondary suite - typically 600-1,000 sq ft with its own entry, kitchen, bedroom, bath, and laundry. Lennar built Next Gen units in Camarillo (Mission Oaks expansion phases 2017-2019) and a small number of east Thousand Oaks infill projects. Total Next Gen inventory in the area is approximately 180-220 homes. Resale availability runs 3-6 active listings at any given time. Toll Brothers and Pardee have similar 'second master' or casita configurations in select Moorpark and Camarillo tracts.
What is the difference between a Next Gen suite and an ADU?
Functionally similar; legally distinct. A Next Gen suite is an attached portion of the primary home built under a single building permit as one structure - it shares walls and often utilities with the main home and is recorded as one dwelling unit. An ADU is a separate dwelling unit, attached or detached, recorded as an accessory unit on the same parcel, with its own permits and (typically) its own meters. The Next Gen suite cannot be rented to a third party under most city rules; an ADU can be rented to anyone. For pure family multigen use, both work; for rental income flexibility, ADUs are more flexible.
How much premium do multigen-ready homes command over comparable single-family?
In the Conejo Valley / Camarillo May 2026 market, the typical premium is 8-18% for a permitted secondary unit. Detached guest houses are at the high end (10-20%) because they sit on larger lots and offer the most privacy. Next Gen and similar attached builder configurations run 8-15%. ADU-equipped resales run 8-18% depending on the ADU age and quality. Older grandfathered in-law units run 5-12% because the housing stock itself is older and typically needs renovation.
Can I rent the secondary unit of a multigen home for income?
It depends on the configuration. A detached or attached ADU on its own permit can be rented to anyone (including non-family) under California state law, subject to local short-term-rental rules. A Lennar Next Gen suite (one permit, one dwelling unit) generally cannot be rented as a separate unit because the city does not recognize it as a separate dwelling. Detached guest houses depend on the original permit - some are permitted as 'guest quarters' (no rental allowed) and some as dwelling units (rental allowed). Verify before assuming.
Are there any new-construction multigen homes available in 2026?
Limited. Lennar is no longer actively selling Next Gen in the Conejo Valley / Ventura County footprint - the original tracts sold out 2019-2021. Toll Brothers occasionally offers 'second master' configurations in select Moorpark and Camarillo tracts (currently 2-3 floor plans across active phases). Pardee Serenata in Moorpark has casita options in final phases. For new-construction multigen, the best path in 2026 is usually buying a standard new-construction home and adding an ADU after move-in - the math is similar and the design flexibility is much greater.
What if the in-law unit is unpermitted?
Unpermitted secondary units are common in older neighborhoods (Strathearn, Old Town Camarillo, parts of central Thousand Oaks) where 1960s-1980s garage conversions and additions were done without permits. The risks: code enforcement exposure, retroactive tax reassessment, insurance complications, and inability to legally rent. The fix: legalize as an ADU under current rules. Most unpermitted secondary units can be legalized for $20K-$60K depending on the code gaps. I bring an ADU-specialist contractor to assess on tour when the configuration warrants it.
Can VA or FHA financing be used on multigen properties?
Yes for both, with some configuration restrictions. VA loans treat a single-family home with an attached or detached ADU as a one-unit property if owner-occupied. FHA the same. Both allow rental income from the secondary unit to count toward qualifying (75% of market rent typically). True multi-unit properties (2-4 units on one parcel) get more specific underwriting for both VA and FHA. Lennar Next Gen properties are recorded as one dwelling unit, so they finance like any single-family home.
How long should I expect to take to find the right multigen property?
Plan for a longer search than a standard single-family purchase. Active multigen inventory in the Conejo Valley runs 25-40 listings across all four categories combined, versus 350-500 single-family listings overall. Median multigen-specific search time for my clients in 2025-2026 has been 4-7 months from start to closing, versus 2-4 months for non-multigen searches. The wait pays off - buying the wrong configuration costs much more than waiting for the right one.
Are there HOA restrictions on multigen use in gated communities?
Sometimes. Many older Conejo Valley HOAs have CC&R language prohibiting 'separate housekeeping' on the same lot - originally written to prevent duplexes but sometimes interpreted to restrict ADU use. Most newer master-planned communities have updated their CC&Rs to align with state ADU law. The Oaks of Calabasas, North Ranch, and Sherwood Country Club all have CC&Rs that need to be reviewed for multigen use case before purchase. I pull and read the CC&Rs on every multigen tour in a gated community.
What is the difference between an in-law suite and an in-law unit?
Terminology varies and matters. 'In-law suite' usually means a bedroom plus bath plus optional sitting area, all within the primary home, with no kitchen and one main address. 'In-law unit' usually means a full secondary dwelling with its own kitchen, bath, and entry. For multigen use, the kitchen makes a huge difference - an in-law unit allows true independence; an in-law suite is more like a guest room. Real estate listings sometimes use the terms interchangeably, so always look at the floor plan and verify kitchen permits.
