Building an ADU in Palos Verdes Estates. Rules, costs, timeline.

Up to two ADUs plus a junior ADU. Ordinance 770 rewrote the chapter in January 2026 and sorted every ADU into one of two classes. Class 1 is the statutorily regulated track at PVEMC § 18.45.050(A). It gives you one ADU converted from existing space in the house or an accessory structure, one junior ADU, and one new detached ADU of up to 800 square feet of livable space with 4-foot side and rear setbacks. The chapter states in its own text that the converted unit and the detached unit may be combined, which is the full stack Gov. Code § 66323(a)(1)–(2) requires and the HCD ADU Handbook (March 2026) works through at p. 17.

On a lot with an existing multifamily building, § 18.45.050(A)(3) allows conversion of non-livable space into at least one ADU and up to 25% of the existing unit count, and (A)(4) allows up to eight detached ADUs, capped at the number of primary dwelling units on the lot (Gov. Code § 66323(a)(4)(A)(ii)). A proposed multifamily building gets two. Junior ADUs remain a single-family product.

Only where it is attached to the house. PVEMC § 18.45.070(J), added by Ordinance 770, says no ADU subject to that section may have more than one story, except an ADU attached to the primary dwelling, which may have the stories allowed under § 18.45.060(B)(4). That subsection permits 25 feet and no more than two stories, or the height the underlying zone allows the primary dwelling, whichever is lower. A detached ADU on the locally regulated track is single story.

The statutorily regulated Class 1 track does not open a second route. Its detached unit is capped at 800 square feet of livable space and at the same 16-, 18- or 20-foot heights set by § 18.45.060(B). The remaining path for a nonconforming unit is a conditional use permit under § 18.45.100, which is discretionary and sits outside the ministerial process.

Up to 850 square feet for a studio or one-bedroom, and 1,000 square feet with two or more bedrooms. That is the locally regulated cap at PVEMC § 18.45.070(A)(1), measured as interior livable space, and it sits exactly on the state floors in Gov. Code § 66321(b)(2). An attached ADU on a lot with an existing primary dwelling is further limited to 50% of that dwelling’s floor area (A)(2). The statutorily regulated track works differently. A new detached ADU there is capped at 800 square feet (§ 18.45.050(A)(2)(b)). A conversion of existing space has no square-foot cap and may add up to 150 square feet for ingress and egress. A junior ADU is capped at 500 square feet (§ 18.45.030(E)(1); Gov. Code § 66313(d)).

One clause does a lot of work here. Section 18.45.070(A)(3) says no percentage-based size limit and no floor-area ratio, front setback, lot coverage or open-space requirement may force an ADU below 800 square feet of interior livable space. The City wrote the Gov. Code § 66321(b)(3) protection into its own text, so the 800-square-foot unit survives the lot math.

Sixteen feet for a detached unit. PVEMC § 18.45.060(B)(1) sets the base at 16 feet. It rises to 18 feet near major transit. That tier applies where the lot is within a half-mile walking distance of a major transit stop or a high-quality transit corridor, and it adds up to 2 more feet to match the primary roof pitch, for a maximum of 20 feet (B)(2). A detached unit also gets 18 feet on a lot with a multifamily dwelling of more than one story above grade (B)(3). Height is measured from the lower of existing or natural grade to the peak (B)(5), which matters on a sloped peninsula lot.

An attached ADU may reach 25 feet and no more than two stories, or the underlying zone’s limit on the primary dwelling if that is lower (B)(4). Gov. Code § 66321(b)(4)(D) sets the same 25-foot floor. Attached is the only two-story ADU envelope in the city, because § 18.45.070(J) caps every other ADU at one story.

Often not. PVEMC § 18.45.070(G)(1) requires one off-street space per ADU or one per bedroom, whichever is less, and the space may sit in a setback area or in tandem. Six exemptions at (G)(2) then remove it. Within a half-mile of public transit. In an architecturally and historically significant historic district. Where the ADU is part of the proposed or existing primary dwelling, or of an accessory structure. Where on-street permits are required but not offered to the ADU occupant. Within one block of a car-share stop. And where the ADU is filed together with an application for a new dwelling on the same lot, and one of the other five also applies. That list tracks Gov. Code § 66322.

Two further rules matter. Demolishing or converting a garage, carport, covered parking structure or uncovered space in conjunction with the ADU never triggers replacement parking (§ 18.45.070(G)(3); Gov. Code § 66314(d)(11)). And § 18.45.070 by its own terms does not reach Class 1 ADUs or junior ADUs, so no parking may be required on those tracks at all. The chapter’s former replacement-parking rule for a garage-to-junior-ADU conversion was repealed.

No, not for an ADU. PVEMC § 18.45.060(G)(1) states that ADUs are not subject to an owner-occupancy requirement. Ordinance 770 repealed the mandate that had applied to applications on or after January 1, 2025, so the chapter now matches Gov. Code § 66315, which bars a city from imposing one at all. An investment build and a family build are treated the same way.

Junior ADUs are different, and the chapter carries the current rule. Owner-occupancy is generally required at § 18.45.060(G)(2)(a), but expressly not where the junior ADU has separate sanitation facilities, or where the property is owned entirely by a governmental agency, land trust or housing organization (G)(2)(b). That is the AB 1154 narrowing at Gov. Code § 66333(b), effective January 1, 2026, written into local text. Give the junior ADU its own bathroom and the requirement does not attach.

Only where your parcel actually requires one — and where it does, that clock now runs alongside the ADU permit rather than after it. PVEMC § 18.45.040(C)(6) says nothing in state ADU law or the code supersedes, alters or lessens the California Coastal Act of 1976. Where a coastal development permit is required for the ADU or junior ADU, a complete coastal permit application has to be included for the ADU application to be complete. That coastal permit must then be approved or denied within 60 days of receipt of the complete application. If the City has no certified local coastal plan or program when the complete application is received, the City notifies the California Coastal Commission immediately.

Whether your lot sits in that regime is a parcel-level question. Palos Verdes Estates separately carries Title 19 Coastal Regulations, the CZ-O Coastal Zone Overlay at Chapter 18.37, and coastal-bluff development limits at § 18.04.160, so check the parcel before you draw. Note too that the deemed-approval provision at § 18.45.040(C)(3) runs to the ADU or junior ADU permit only. It does not reach the coastal permit.

On the locally regulated track, yes — and it is the longest list of standards in the chapter. PVEMC § 18.45.070(H) requires exterior wall, roof, window and door materials and colors to be the same as the primary dwelling, and the roof slope to match the primary dwelling’s dominant slope. Exterior lighting is limited to down-lights. The unit needs an independent exterior entrance, a minimum interior horizontal dimension of 10 feet in every direction, and a minimum interior wall height of 7 feet. No window or door may have a direct line of sight to an adjoining residential property, unless it is screened by fencing, landscaping or privacy glass. And every window and door within 30 feet of a property line that is not a public right-of-way must be clerestory, with glass at least 6 feet above the finished floor, or else frosted or obscure.

Two limits sit on top of that. Section 18.45.070 does not apply to Class 1 units at all, so the whole architectural list drops away inside the 800-square-foot statutorily regulated envelope. And state law requires ADU review to run against objective standards only (Gov. Code §§ 66313(i), 66314(b)(1)). HCD’s April 4, 2024 findings letter to the City read matching-materials and direct-line-of-sight formulations as insufficiently objective, and Ordinance 770 kept substantially the same wording.

Not the City’s permit. ADU review is ministerial under Gov. Code § 66317, and § 66317(c) is explicit that no third party may approve or deny an ADU application — only the permitting agency decides. Gov. Code § 66315 separately bars a city from imposing deed restrictions on an ADU as an additional standard. A private covenant is a civil matter between you and whoever holds it, not a land-use rule the City applies at the counter.

One thing here has changed. The provision that used to require an applicant to send a copy of the ADU application to the Palos Verdes Homes Association within five days of submittal does not appear anywhere in Chapter 18.45 as amended by Ordinance 770. If an equivalent requirement survives elsewhere in the municipal code, it has to be cited from that chapter rather than from the ADU chapter. Ask the City before you assume it applies to you.

No. State law settles this one. Gov. Code § 66323(e) requires a local agency to impose a rental term longer than 30 days on a § 66323 unit, and Gov. Code § 66333(g) does the same for junior ADUs. That is mandatory rather than optional, so nightly and weekly letting is out for these units everywhere in California. Month-to-month leases, annual leases and furnished mid-term tenancies are unaffected.

Ordinance 770 rewrote Chapter 18.45 end to end in January 2026 and renumbered the whole chapter, so confirm the current local subsection with the Planning Division before you write a lease clause against it. Treat any rental-registration or annual-reporting condition you are handed the same way: the conditions previously recorded for this city do not appear in the amended chapter.

No. PVEMC §§ 18.45.060(E) and 18.45.060(H)(1) bar selling or otherwise conveying an ADU or junior ADU separately from the lot and the primary dwelling, except as Gov. Code § 66341 provides. That exception is the mandatory statewide route for a unit built by a qualified nonprofit and conveyed to a qualified low- or moderate-income buyer under a recorded tenancy-in-common agreement. It requires no local opt-in, and it is not an AB 1033 pathway.

The condominium route is a different statute. It is available only where a city has adopted an opt-in ordinance under Gov. Code § 66342, and Palos Verdes Estates has not adopted one. Build here for rental income, family housing or long-term property value, not for a condominium exit.

Not below 750 square feet. PVEMC § 18.45.080(A)(1), a section Ordinance 770 created, bars any impact fee on a junior ADU or on an ADU with less than 750 square feet of interior livable space. The chapter defines an impact fee narrowly. It means a Mitigation Fee Act fee under Gov. Code § 66000(b) and a Quimby Act fee under Gov. Code § 66477. Water and sewer connection fees and capacity charges are expressly excluded. At 750 square feet or more, any impact fee must be charged in proportion to the primary dwelling’s square footage (A)(3). That matches Gov. Code § 66311.5(c)(1).

A junior ADU or an ADU under 500 square feet of interior livable space is also outside school fees under Education Code § 17620 (§ 18.45.080(A)(2); Gov. Code § 66311.5(c)(3)). Utility connection fees and capacity charges are a separate item and follow their own rules at § 18.45.080(B).

Yes, and it is usually the shortest path. A conversion of existing space is a Class 1 unit under PVEMC § 18.45.050(A)(1). It carries no square-foot cap. It may add up to 150 square feet for ingress and egress. And it needs only the side and rear setbacks the building and fire codes require for fire and safety (§ 18.45.050(A)(1)(c)). Because § 18.45.070 does not apply to Class 1 units, the architectural-match list, the floor-area ratio, the lot-coverage and open-space standards and the parking requirement all drop away.

No replacement parking may be required for the spaces you lose (§ 18.45.070(G)(3); Gov. Code § 66314(d)(11)). And the conversion stacks: § 18.45.050(A)(1) and (A)(2) may be combined, so a converted garage and a new detached unit of up to 800 square feet can sit on the same lot, with a junior ADU inside the house alongside them.

Often, yes. PVEMC § 18.45.090(B) says the City may not deny a permit to legalize an unpermitted ADU or junior ADU constructed before January 1, 2020, subject to findings under Health and Safety Code § 17920.3. Gov. Code § 66311.7 sets up the same streamlined path statewide; AB 2533 added it and SB 543 renumbered it effective January 1, 2026. Under that section a city may not deny the permit over building-code violations unless they threaten health or safety.

Have the structure surveyed before you apply. The health-and-safety findings are where these applications turn, and they are much easier to answer with a report in hand than with an inspector standing in the doorway.

Sixty days from a complete application. Review is ministerial — no hearing, no discretionary design review, no neighbor sign-off (Gov. Code § 66317). The City must determine completeness and notify you in writing within 15 business days (SB 543, effective January 1, 2026; Gov. Code § 66317(a)(2)(A)), then approve or deny within 60 days of a complete application, and PVEMC § 18.45.040(C)(3) carries the deemed-approval consequence if it does not.

On a pre-engineered Signature plan, expect roughly 2 weeks of plan preparation, a permit cycle measured in weeks rather than months, then 4 to 6 months of construction — about 6 to 9 months start to finish. Custom designs run longer at both ends because the City is reviewing the drawings for the first time. Where a coastal development permit is required, its own 60-day clock runs concurrently under § 18.45.040(C)(6).