By Rinde Philippe | Philippe Properties 310-422-9001 - rindephilippe@bhhscal.com
Berkshire Hathaway HomeServices California Properties | CA DRE #01895315
Updated October 5, 2026
Buying a duplex, triplex, fourplex, or apartment building in Santa Monica means buying more than a structure. You are also acquiring existing tenancies, an income stream, maintenance obligations, and a history of permits and repairs.
Before removing contingencies, verify the building’s condition, legal unit count, actual rental income, rent-control status, major repair obligations, and cost to insure and operate it. A renovated vacant unit and an attractive advertised cap rate do not answer those questions.
This Santa Monica multifamily due-diligence checklist explains what to inspect, which records to request, and how to connect the findings to your purchase decision.
Is a general home inspection enough for a duplex or apartment building?
Usually, no. Start with an inspector experienced in multifamily properties. The inspection should address accessible units and common areas, roofing, foundations, drainage, garages, stairs, electrical systems, plumbing, heating, and water intrusion. A larger apartment building may warrant a commercial property condition assessment.
Depending on the findings, arrange specialist evaluations for:
Sewer lines and underground drains, including a sewer camera inspection.
Roofing, waterproofing, gutters, and drainage.
Foundation movement, structural concerns, and seismic work.
Electrical panels, wiring, service capacity, and potential upgrades.
Supply pipes, water heaters, gas equipment, and plumbing leaks.
Termites, other wood-destroying organisms, and damaged framing.
Mold, moisture, lead paint, or suspect asbestos materials.
Balconies, decks, exterior stairs, and elevated walkways.
Elevators, pools, and other building-specific equipment.
Ask what each inspection excludes and which areas were inaccessible. A locked utility room or an uninspected unit remains an unresolved issue. Get repair estimates where findings could materially affect your budget.
Should I inspect every tenant-occupied unit?
Aim to inspect every unit, along with shared spaces and building systems. Coordinate access through the seller or property manager under the purchase agreement and applicable tenant-entry requirements.
Do not assume that an occupied unit resembles the renovated unit shown in the listing. Units can differ in wiring, plumbing, water damage, alterations, and maintenance history.
Compare the observed layout, appliances, parking, storage, and utilities with the leases and rent roll. If access is unavailable, document which unit or area was missed and discuss how to address that uncertainty before removing contingencies.
Communication should be respectful, calm, and accurate. Discuss preliminary findings privately with your advisers rather than speculating in front of residents. Confirmed hazards still require appropriate communication and attention.
How do I verify the rent roll instead of relying on advertised income?
Start when you prepare the offer. Negotiate delivery of leases, supporting income records, and tenant-signed estoppel certificates, including deadlines and how missing or conflicting certificates will be handled.
A tenant estoppel certificate is a signed statement confirming important tenancy details. Depending on the form, it can address rent, deposits, lease dates, concessions, prepaid rent, parking, utilities, additional agreements, and outstanding issues.
Request:
The current rent roll and unit-by-unit rent history.
All leases, renewals, amendments, and relevant side agreements.
Tenant ledgers and supporting collection records.
Security-deposit and prepaid-rent records.
Concessions, delinquent balances, and payment plans.
Existing tenant estoppel certificates and outstanding responses.
Parking, laundry, storage, and other income agreements.
Cross-check those records against actual collections. Distinguish collected income from scheduled rent, vacant-unit projections, and advertised “market rent.”
Discrepancies may reveal undocumented agreements, unpaid balances, or occupants who differ from the names on a lease. Potential subleasing or occupancy issues require factual investigation and legal review; they do not automatically establish grounds for eviction.
How does Santa Monica rent control affect a multifamily purchase?
Verify each unit’s status through the Santa Monica Rent Control Board and its public records portal. Ask for registration records, Maximum Allowable Rent information, exemption decisions, and relevant petitions or orders.
Review:
Current rent compared with the applicable Maximum Allowable Rent.
Tenancy start dates and the basis for recorded rent levels.
Included housing services, such as parking, storage, and utilities.
Outstanding registration matters and fees.
Rent-reduction or rent-withholding orders.
Claimed exemptions and whether their basis will continue after sale.
Applicable state and local rent-increase and eviction protections.
An owner-occupied exemption may depend on facts that change when a property is sold. The Board’s 2024 annual report describes exemptions lapsing after ownership or occupancy changes.
Being exempt from local rent limits does not necessarily mean being exempt from registration or tenant protections. Review applicable registration requirements for non-rent-controlled housing and obtain local legal advice where the status is uncertain.
Underwrite existing occupied units using verified lawful rents. Do not assume that purchase, renovation, or a new owner’s plans will allow an immediate increase to market rent.
How can I tell whether an extra unit or garage conversion is legal?
Start with written seller disclosures and independently check city records. Ask about known unpermitted additions, garage conversions, extra units, code violations, and notices.
Compare the actual configuration with approved plans, permit history, final approvals, and certificates of occupancy where applicable. An issued permit does not prove that work was completed and approved.
Santa Monica offers an inspection-history lookup, a Permit Services Center, and access to Residential Building Reports through its building-permit resources. Review the applicable presale reporting requirements with your agent and escrow team.
A separate entrance, kitchen, utility meter, assessor entry, lease, or history of rent payments does not independently establish legal dwelling-unit status. A unit’s presence in rent-control records also does not substitute for building approval.
If records conflict or are incomplete, seek written clarification from Building and Safety and Planning. An architect or land-use attorney can help evaluate approved use, potential legalization, and related costs. Resolve uncertainty before assigning value to an additional unit’s income.
Looking at a Santa Monica duplex, triplex, fourplex, or apartment building? Send me the property address and tell me where you are in your search. We can discuss your goals, the available information, and how I can help with your purchase. Call or text 310-422-9001 or email RindePhilippe@bhhscal.com.
What does the preliminary title report tell me?
Review the preliminary title report and the documents referenced in its exceptions with your title officer and advisers.
Look for recorded easements, access restrictions, liens, covenants, affordable-housing restrictions, and other matters that could affect ownership or your intended use. If fences, shared driveways, or structures raise boundary questions, consider whether a survey is needed.
A preliminary title report does not establish that a garage conversion or extra unit is permitted. Title review complements city-record research and physical inspections. Ask the title company to explain proposed coverage, exceptions, and any additional coverage that may be available.
For related reading, see title-report red flags for multifamily buyers.
What if the building is on Santa Monica’s seismic retrofit list?
A building’s appearance on the city’s list identifies a potential vulnerability; it does not replace a property-specific engineering assessment.
Check the Santa Monica Seismic Retrofit Program and request notices, deadlines, engineering reports, approved plans, permits, contractor records, and evidence of final approval.
If work remains, obtain professional estimates addressing cost, scheduling, access, parking, and potential tenant disruption. Confirm the building’s current status with the city rather than relying on a seller’s statement that it was “retrofitted.”
The city states that owners may not pass seismic retrofit costs through to tenants in controlled properties. Budget accordingly.
Do balconies and exterior walkways need a separate inspection?
They may. California’s SB 721 balcony inspection requirements apply to qualifying exterior elevated elements in buildings with three or more multifamily dwelling units. Covered elements include certain wood-supported balconies, decks, stairs, and walkways more than six feet above ground.
The general initial inspection deadline was January 1, 2026, subject to statutory exceptions, with recurring inspections generally every six years. Condominium developments follow a different framework.
Request the applicable inspection reports, repair recommendations, permits, completion documentation, and any access restrictions or enforcement notices. Under Health and Safety Code Section 17973, required reports must be disclosed and delivered to a subsequent buyer.
A general property inspection does not replace this compliance review. Duplexes outside this particular requirement still warrant inspection of decks, stairs, and railings for safety and deterioration.
Do I need to check lead paint, asbestos, mold, and termites?
Yes. Include these concerns in due diligence, with qualified specialists determining which assessments and tests are appropriate.
Lead paint: For most pre-1978 housing, review required disclosures and available reports. Consider a certified lead inspection or risk assessment, especially where paint is deteriorating or renovations are planned. The EPA explains lead-disclosure requirements, including the buyer’s inspection opportunity.
Asbestos: Have a qualified asbestos professional assess suspect materials that are damaged or may be disturbed. Avoid destructive sampling by unqualified people. EPA guidance recommends professional sampling in those circumstances.
Mold and moisture: Investigate stains, odors, leaks, and ventilation problems, including prior tenant complaints. A qualified assessment should identify the moisture source and appropriate corrective work. Visible mold often does not require sampling; testing is not a substitute for repair and cleanup.
Termites and wood damage: Obtain a licensed wood-destroying pest inspection. Review active infestations, dry rot, damaged framing, prior treatments, and recommended repairs.
Request remediation records, warranties, and follow-up evaluations. If problems are identified, your agent can seek seller repairs, credits, or a price adjustment, subject to the contract and seller’s agreement. A negotiated discount does not correct a hazard or eliminate ongoing ownership obligations.
What fire and life-safety issues should I check?
Include smoke and carbon-monoxide alarms, safe exits, stairs, handrails, fire doors, and applicable alarm, sprinkler, and extinguisher systems. Request available fire-inspection reports, maintenance records, and outstanding correction notices.
Ask qualified inspectors to assess unsafe electrical conditions, heating equipment, and obstructed exits. Confirm requirements for the particular building with Santa Monica Fire Prevention.
Should I order a Phase I Environmental Site Assessment?
Ask your lender and an environmental professional, especially for larger apartment buildings, mixed-use sites, or properties with potentially concerning past uses or nearby businesses.
A Phase I Environmental Site Assessment evaluates site history and potential contamination risks, including those associated with former gas stations, dry cleaners, industrial activities, or underground tanks. It is different from an indoor mold or termite inspection.
The EPA explains environmental due diligence and All Appropriate Inquiries. Confirm scope with the consultant; lead, asbestos, mold, and other building-material concerns may require separate services.
How do I calculate the real operating expenses and cap rate?
Request preferably two to three years of operating statements, recent year-to-date figures, and supporting bills. Review property taxes, insurance, utilities, repairs, management, landscaping, pest control, registration fees, and service contracts.
Account for vacancy, unpaid rent, and management costs even if the seller manages the property personally. Separate routine expenses from major capital projects and budget replacement reserves.
Net operating income (NOI) generally means operating income minus operating expenses, before mortgage payments and income taxes. Cap rate is annual NOI divided by purchase price. Capital repairs and debt service still affect cash flow even when excluded from the advertised NOI calculation.
For example, verified annual NOI of $100,000 on a $2 million purchase implies a 5% cap rate. If the expense budget omits $20,000 annually, adjusted NOI becomes $80,000 and the cap rate falls to 4%, before financing and capital spending.
Will my property taxes increase after purchase?
They may increase substantially. California purchases generally trigger reassessment unless an exclusion applies. The seller’s longstanding tax basis may not reflect your future bill.
Estimate reassessed taxes, supplemental assessments, and applicable parcel charges or special assessments. Confirm assumptions with your escrow team, tax adviser, or the assessor. The California Board of Equalization explains change-in-ownership reassessment.
Can I insure the building at a reasonable cost?
Obtain a property-specific insurance quote during due diligence. Do not assume the seller’s premium or policy will be available to you.
Review replacement-cost assumptions, deductibles, liability coverage, loss of rental income, exclusions, and any required building repairs. Ask separately about earthquake and flood coverage and whether older electrical, plumbing, roofing, or seismic conditions affect eligibility.
Discuss available claim history and loss information with the seller and insurance adviser. Confirm timing and requirements for binding coverage before closing.
Could tenant disputes or renovations create additional costs?
Yes. Request tenant complaints, code-enforcement notices, rent-control proceedings, litigation, buyout agreements, and unresolved repair obligations. Include affordable-housing restrictions and subsidy agreements where applicable.
If renovations may make occupied units temporarily unusable, investigate relocation obligations, permitted construction procedures, tenant notice, and the cost of maintaining required housing services.
Santa Monica has specific tenant relocation assistance rules. Obtain local legal advice before assuming a unit can be delivered vacant or a tenant can be displaced for your proposed work.
What should happen to security deposits and prepaid rent at closing?
Reconcile deposits and prepaid rent unit by unit against leases, ledgers, and estoppel certificates. Coordinate the agreed transfer or escrow credit, rent prorations, and required tenant notices with escrow and legal advisers.
Confirm delivery of leases, keys, access codes, warranties, inspection reports, maintenance records, and assigned service contracts. Check whether management, laundry, solar, equipment, or other agreements require consent, carry termination fees, or continue after closing.
Reconfirm the rent roll shortly before closing and investigate material changes in occupancy, collections, or concessions.
What expensive problems do Santa Monica multifamily buyers miss?
Commonly overlooked risks include inaccessible units, aging sewer lines, roof leaks, deferred balcony repairs, unfinished seismic work, unverified additional units, undocumented tenant agreements, and expenses based on the seller’s taxes or insurance.
Another risk is paying for projected income that depends on rent increases or vacancies you have not verified as achievable. Compare the property’s value under current conditions with the cost, timing, and legal feasibility of your proposed improvements.
How do I check for code violations or rent-reduction orders before buying a Santa Monica multifamily property?
Ask for more than the seller’s disclosures. During due diligence, investigate open Code Enforcement cases, notices of violation, habitability determinations, tenant relocation orders, and pending or existing Rent Control Board proceedings.
Request the relevant records from Santa Monica’s Code Enforcement and Building and Safety departments. Separately, review the Rent Control Board’s public records and contact the agency about pending petitions, existing decisions, and compliance status. Online records and a preliminary title report may not reveal every unresolved issue.
Your review should include:
Open violations, citations, correction deadlines, and outstanding fees.
Habitability determinations and related relocation obligations.
Pending rent-decrease petitions and existing rent-reduction or rent-withholding orders.
Tenant repair complaints, inspection reports, and correspondence with the city.
Required repairs, permits, contractor estimates, and evidence of completed work.
Written case closure or compliance determinations for matters described as resolved.
These issues can affect collectible rent, repair costs, tenant obligations, financing, and the property’s value. Do not assume a sale clears them. Santa Monica’s Rent Control Law specifically provides that an order authorizing rent withholding survives a property transfer and binds the successor landlord.
Before removing applicable contingencies, have your agent coordinate review with the appropriate city departments, your lender, title officer, and a qualified local attorney. If issues remain, negotiate documented seller correction, an appropriate price adjustment, or other contract protections. A discount alone does not close an enforcement case or restore the permitted rent.
What should I verify before removing contingencies?
Before removing applicable contingencies on a Santa Monica multifamily purchase, review these items with your agent, lender, inspectors, and other advisers:
Property condition: Inspect accessible units and common areas. Review specialist reports, major defects, repair estimates, and anything inspectors could not access.
Legal unit count and permits: Confirm the approved number of dwelling units, permitted uses, permit history, final inspection approvals, and applicable city reports. Investigate unpermitted additions or garage conversions.
Leases and rental income: Cross-check the rent roll against leases, amendments, tenant estoppel certificates, tenant ledgers, and actual collections. Identify concessions, unpaid balances, prepaid rent, and additional agreements.
Rent control and tenant protections: Verify each unit’s registration, lawful rent, Maximum Allowable Rent where applicable, exemption status, and outstanding orders. Confirm whether a claimed exemption will continue after the sale.
Seismic retrofit status: Review city notices, engineering reports, compliance deadlines, permits, completed work, and final approvals. Obtain estimates for outstanding requirements.
Balconies and elevated walkways: Determine whether balcony inspection requirements apply. Obtain inspection reports, repair recommendations, completion records, and any safety or access restrictions.
Environmental and pest concerns: Review appropriate assessments for termites, moisture, mold, lead paint, asbestos, and potential site contamination. Obtain remediation records and estimates where needed.
Fire and life safety: Check alarms, exits, stairs, railings, fire doors, and applicable fire-protection systems. Review outstanding correction notices.
Operating expenses and reserves: Verify expenses with supporting records. Budget for vacancy, management, maintenance, major repairs, and replacement reserves.
Property taxes: Estimate taxes after reassessment, potential supplemental assessments, and applicable parcel charges or special assessments.
Insurance and financing: Obtain property-specific insurance quotes and confirm coverage, exclusions, deductibles, and required repairs. Review lender conditions, appraisal concerns, and cash requirements.
Title and property boundaries: Review the preliminary title report and referenced documents for liens, easements, restrictions, and access issues. Consider a survey where boundaries or encroachments are uncertain.
Tenant disputes and relocation: Review complaints, litigation, rent-control proceedings, buyout agreements, and code-enforcement notices. Determine whether planned work could create relocation obligations or costs.
Security deposits and closing records: Reconcile deposits, prepaid rent, and rent prorations. Confirm transfer of leases, keys, access codes, warranties, maintenance records, and applicable service contracts.
Unresolved issues and deadlines: Document missing information and material discrepancies. Address them through the options available under your purchase agreement before the relevant deadlines. Inspection, document-review, financing, and other contingencies may have different scopes and dates.
Why work with an agent experienced in Santa Monica multifamily properties?
An experienced multifamily agent helps structure document requests, coordinate inspections, track contingency deadlines, and identify discrepancies between the listing, records, and property itself.
The agent’s role is to bring the findings together and help you negotiate an informed purchase, while qualified inspectors, engineers, attorneys, and insurance professionals address their respective specialties.
Buying or selling a multifamily property in Santa Monica?
For buyers: Send me the property address and your investment goals. I can help you compare opportunities, structure your offer, coordinate due diligence, and negotiate based on what the records and inspections reveal.
For owners considering a sale: Contact me to discuss your building’s value, pricing strategy, and preparation for the market. We can review the records buyers are likely to request and identify issues to address before listing your duplex, triplex, fourplex, or apartment building.
Call or text Rinde Philippe at 310-422-9001, or email RindePhilippe@bhhscal.com.
Philippe Properties
Berkshire Hathaway HomeServices California Properties
CA DRE #01895315
philippeproperties.com
For a broader regional checklist, read multifamily due diligence for Los Angeles buyers.
This article provides general information, not property-specific legal, tax, insurance, engineering, or inspection advice. Requirements depend on the property and may change; verify current rules and records with the appropriate professionals and agencies.