Building an ADU in Lakewood. Rules, costs, timeline.

Can I build an ADU in Lakewood?

Five things to know before you start

If you read nothing else here, read these. They are the five points that change the most Lakewood projects.

How many units your lot can hold

Lakewood is the archetypal post-war planned community: roughly 22,700 single-family homes on flat, regular tract lots. The ordinance treats those lots generously. LMC § 9302.21a(A)(1) directs the City to ministerially approve up to two ADUs per single-family lot — one carved out of existing space, one built new — and LMC § 9302.21b adds a junior ADU inside the house. That mirrors the state stack at Gov. Code § 66323(a)(1)–(2), which the HCD ADU Handbook reads the same way.

The ordinance sets its own ceiling on top of that: no more than four dwelling units on a lot that existed on January 1, 2022, counting the primary house, any ADUs, a junior ADU, and a second primary unit created under SB 9. Lots created after that date are held to two units of any type.

What the city cannot do

Review is ministerial. Lakewood applies objective standards to your drawings and issues the permit, or it tells you in writing what is deficient and how to fix it. There is no public hearing, no discretionary design review, and no neighbor appeal path (Gov. Code § 66317). The City may not require you to live on the property, may not demand replacement parking for a converted garage, and may not use floor-area ratio, lot coverage or open-space rules to stop an 800-square-foot ADU with 4-foot setbacks.

What an ADU costs here in 2026

An ADU budget has three parts that behave very differently. The plan fee is fixed and known before you start. Construction is a range that narrows once we see your lot. City fees are mostly small and published, with one variable piece tied to construction valuation.

What the City of Lakewood charges

Two ADU-specific charges appear on the City Planning Fee Schedule revised April 28, 2025: an ADU / JADU / SB 9 review fee of $320 for one to three units, and a Construction of Dwelling Units Tax of $330 per dwelling unit under LMC § 6527.2.D.3. Building plan-check and permit fees are calculated on construction valuation rather than a flat rate, and school fees are paid directly to the school district.

What it returns

Lakewood sits inside the Los Angeles–Long Beach–Glendale HUD Metro Fair Market Rent Area. HUD’s revised FY 2026 Fair Market Rents for that area, published at 91 FR 21301 and effective May 21, 2026, are $2,079 for a studio, $2,328 for one bedroom, $2,903 for two bedrooms and $3,681 for three.

Read those as a floor, not a forecast. Fair Market Rents average across the entire metro and across housing of every age and condition, most of it decades older than anything you would build now. A new, permitted, detached two-bedroom unit typically rents at or above the two-bedroom figure. What it will actually fetch on your street is a question for a local agent, and worth asking before you commit.

The other half of the return is resale. A permitted ADU adds recorded square footage that comps into the sale of the property. An unpermitted conversion does the opposite: it is a disclosure problem and a financing problem, and it is the reason the state created a legalisation path for pre-2020 units at Gov. Code § 66311.7.

When an ADU isn’t the right move

Not every Lakewood property is a good candidate, and it is cheaper to learn that now than after you have paid for drawings. Four situations where we would tell you to wait, change type, or not build:

• Your numbers depend on short-term rental income. They will not work. Rentals under 31 days are prohibited for both ADUs and junior ADUs, the restriction is recorded against the title, and there is no carve-out to apply for. Run the maths on a 31-day-plus tenancy or reconsider the project.
• You need to sell the unit separately. Lakewood has not adopted an AB 1033 opt-in, so an ADU here cannot be conveyed as its own condominium. If a separate sale is the exit you are planning for, this is the wrong city and the wrong year to count on it.
• What is left of your lot after setbacks is very small. After four-foot side and rear setbacks and four feet of eave clearance from the house, some parcels cannot take a detached structure worth building. On those lots a garage conversion or a junior ADU usually returns more than forcing a new build into the gap.
• Your ADU depends on utility capacity the City says is not there. LMC § 9302.21a(D)(8) lets Lakewood deny a new detached ADU where it finds water, fire flow, sewer or electrical capacity inadequate. An ADU attached to the existing house is treated as an expansion of that house and is not subject to the finding. If your block is flagged, the attached or conversion route may be the only one open — find that out before you design.

The rules that make Lakewood different

Lakewood has no Coastal Zone, no state-designated very-high fire hazard severity zone, and no historic-preservation overlay. The complications that dominate ADU projects on the Westside or in the foothills simply are not here. What is here is a permissive height rule and an ordinance that the state has flagged as ageing.

The 2023 ordinance, and what the state said about it in 2026

Lakewood rewrote its ADU chapter through Ordinance No. 2023-1, amending LMC §§ 9302.1, 9302.21a and 9302.21b to conform to the 2022 state amendments — principally SB 897 on heights and AB 2221 on objective standards. That is still the operative local text.

On May 11, 2026, HCD wrote to the City’s Community Development Director. The letter notes that the most recent ADU ordinance on file for Lakewood is from 2023 and that, given the volume of statutory change since, it may be outdated and out of compliance. HCD then listed the amendments — owner-occupancy, junior-ADU sanitation, the eight-detached multifamily rule, impact fees, the fifteen-business-day completeness notice, the SB 477 renumbering — and asked the City to respond by June 10, 2026 with either an explanation of continued compliance or a plan to repeal or amend.

Multifamily lots — the local cap is too low

On a lot with an existing or proposed multifamily complex of two or more attached units, LMC § 9302.21a(A)(2) allows no more than two externally detached ADUs, plus at least one internal ADU converted from non-habitable space, plus further internal conversions up to 25 percent of the existing primary units.

Junior ADUs and the bathroom question

A junior ADU in Lakewood is converted from existing or proposed floor area inside a single-family home or an attached accessory building. It runs 150 to 500 square feet, needs an efficiency kitchen and its own exterior door, and may either share the house’s bathroom through an internal doorway or have its own. It is allowed in the R-1, R-A, A and PD-SF zones, or wherever a legally established non-conforming single-family home stands.

Separate sale, and the one exception

Lakewood has adopted no AB 1033 opt-in ordinance, which is the precondition Gov. Code §§ 66340–66342 set before an ADU can be sold separately as a condominium. The Notice of Condition recorded against the property bars separate sale except as otherwise authorised by state law. The exception state law does provide, at Gov. Code § 66340, is a sale to a qualified nonprofit housing organisation. Unless the City opts in, that is the only separate-sale route available.

The fire-hydrant rule

LMC § 9302.21a(D)(8)(b) requires an ADU to sit within 450 feet of a fire hydrant with a clear path to run a hose to all parts of the unit. Fire sprinklers are not required for an ADU if they are not required for the primary dwelling, which tracks Gov. Code § 66314(d)(12). HCD’s 2023 review of the City’s previous ordinance objected to the 450-foot rule as an ADU-only standard unless it applies to all residential development. The provision survives in the 2023 text. On a flat, hydrant-dense grid like Lakewood it is rarely the binding constraint, but it is worth checking early if your lot is deep.

How much of this is actually happening

The City publishes its own counts. As of February 1, 2025 there were 320 ADUs permitted and built in Lakewood with another 349 in review or under construction, against roughly 22,700 single-family homes. Annual completions went from 46 in 2022 to 81 in 2023 to 120 in 2024. Around 1.4 percent of Lakewood houses have an ADU today and about the same share again have one in the pipeline. Staff see these applications constantly, which is generally good news for how smoothly a conforming set moves.