Everything San Diego County buyers ask about manufactured homes, ADUs, modular homes, financing, permits, site prep, and the buying process. Organized by topic.
73 answers covering manufactured home buying, ADU construction, modular and prefab homes, financing options (chattel loans vs. mortgages, FHA Title I and II), permits, land requirements, site prep costs, and what the process looks like end to end in San Diego County. Every answer links to the deeper guide it came from.
It depends on the exact home and where it goes. For a park purchase, compare the home price with the current space agreement, required charges, financing, insurance, condition, and repairs. For private land, add design, delivery, foundation, utilities, permits, grading, access, installation, finishes, financing, and contingencies. Compare dated written proposals with the same scope rather than a generic range.
Request an itemized proposal for the unit, design, delivery, foundation, utility connections, permits, inspections, site work, finishes, exclusions, and change orders. Compare manufactured, modular, and site-built proposals on the same size, finish, site, and utility scope before deciding which costs less.
Site preparation depends on grading, drainage, retaining, foundation design, utilities, septic or sewer, power, fire access, roads, permits, and delivery access. Obtain the agency requirements and preliminary plans first, then compare written contractor estimates that use the same quantities, allowances, and exclusions.
Either path can cost less for a particular buyer. Compare the park home's price, current space agreement, required charges, financing, insurance, maintenance, and resale assumptions with the private-land home's land, site work, utilities, permits, financing, taxes, maintenance, and schedule risk. Use the same time horizon and written current figures.
Future value is not guaranteed. It depends on the home, land interest, location, condition, records, park or community terms, financing market, supply, and buyer demand. Review comparable sales with a qualified appraiser or real-estate professional and do not treat a foundation filing as an appreciation promise.
Form 433A is part of California's foundation-system documentation. HCD says that after the required documents are recorded, the home is no longer registered by HCD. Ask HCD, the enforcement agency, County records, title or escrow, the assessor, and each lender to confirm how the completed record affects the specific transaction. It does not guarantee financing, a tax result, or resale value.
Tax treatment depends on the home's records, land interest, assessment, transaction, and current law. Do not infer it from appearance or a seller's description. Ask the County Assessor and a qualified tax adviser which assessment and exemption rules apply to the specific property before comparing costs.
Build the replacement budget from written scopes for surveys or testing, utility disconnection, removal or transport, disposal, permits, foundation and site changes, the new unit, delivery, setup, reconnections, finish work, inspections, and temporary housing. Compare an alternative build only after both proposals include the same site and finish scope.
Some loan programs may allow a low or zero down payment for eligible borrowers and properties, but current rules, fees, lender overlays, and cash-to-close requirements vary. Ask participating lenders for a dated written comparison using the exact home, land, occupancy, income, and borrower facts. A program name does not guarantee approval or zero cash due.
Ask each lender or creditor for the required disclosures and an itemized cash-to-close estimate for the same transaction. Compare rate or APR, lender fees, title or registration work, escrow, appraisal, inspections, taxes, insurance, prepaid items, and any dealer charges. Lower upfront fees do not establish a lower total cost.
In a land-lease park, you own the home but rent the land from the park operator. In a private land placement, you own both the home and the dirt. Park placements have lower upfront costs and simpler setup, but lot rent and park rules affect your long-term costs and lifestyle. Private land placements require more work upfront but build full real property equity.
Possibly. Start with the parcel's city or County jurisdiction and zoning. Current County PDS103 applies to unincorporated County private lots and includes specified 1971–1976 mobilehomes as well as qualifying post-June-15-1976 manufactured homes. It also lists foundation, exterior, fire-area, permit, and other rules, with stated exceptions or waiver paths for some roof and overhang provisions. Incorporated cities use their own review process.
In a land-lease community, the buyer generally acquires the home while renting the space. Ask management for the current rent, other required charges, approval criteria, rules, rent-increase history, and proposed agreement for the specific space. Review the governing disclosures and ask a qualified adviser about rights or obligations you do not understand.
Yes, when the seller, home, park, buyer approval, financing, and records align. Verify build date, HCD registration and title, liens, taxes or fees, condition, additions, insurance, park approval, current space terms, required charges, and known land-use or ownership changes before making an offer.
It depends on where the home is. Park rules often restrict subletting, so check the lease agreement carefully. Homes on private land can generally be rented like any other residential property. ADU placements on a property you own are specifically designed for rental income and are a common use case. California owner-occupancy requirements for most ADUs were eliminated for most situations as of 2020, and remained relaxed through 2026 rule updates.
Start with the HUD data plate and certification label. Pre-1976 homes have no HUD certification and are much harder to finance or place on private land. Check for the 433A recording if the home is on private land. Inspect the roof (pitch, condition, skylights), subfloor, plumbing, and electrical panel. Most conventional home inspectors can inspect a manufactured home, but hiring one with experience in factory-built housing is worth the extra effort.
Often yes. Rural and agricultural zones in unincorporated San Diego County (zones like A70, A72, and RR) typically allow manufactured homes as primary residences. You will need a septic system and a well or water service agreement if the parcel is off the municipal grid. Parcel size, fire clearance requirements, and access road standards are the most common limiting factors.
In unincorporated San Diego County, residential zones that allow single-family homes generally allow HUD-certified manufactured homes on permanent foundations. The home must meet Section 6506 design standards (roof pitch, eaves, conventional siding) to blend with the neighborhood. Check the parcel's zone designation with the County Planning Department before purchasing land for this purpose.
New homes give you full HUD certification, modern energy standards, warranty coverage, and clean financing eligibility. Used homes cost significantly less upfront but may need updates to meet current financing or placement standards. For a private land placement where you need conventional financing, new is usually easier. For a park placement where you just want affordable housing, a well-maintained used home can be an excellent deal.
A park purchase of an existing home is the fastest, often 30 to 60 days from offer to occupancy. A new home on private land takes longer: land purchase, permits, site prep, and factory lead times combine to 4 to 9 months in most cases. San Diego County permit timelines vary by jurisdiction and complexity. We tell clients to plan for 6 months minimum on a ground-up private land project.
We start with a free buyer consultation about your goals, land or park path, budget, timing, and questions. Land & Home SD is a referral service: we provide information and connect customers with independent local manufactured-home professionals. We do not sell homes or perform the work. You choose the provider, and your contract, price, work, licensing, and warranties are handled directly with that provider.
A chattel loan is secured by the manufactured home as personal property rather than by the land. A mortgage is secured by real property. Available products, rates, fees, terms, collateral, protections, and closing conditions vary, so compare current written disclosures using the same home, land, and borrower facts rather than assuming one fixed rate spread or timeline.
Possibly. Requirements vary by lender and program and can include build date and labels, home size and condition, foundation and installation records, title or registration status, land interest, occupancy, appraisal, and borrower qualifications. Ask the lender for its current written checklist for the exact property before making an offer.
FHA Title II is a mortgage program with current borrower, occupancy, property, foundation, appraisal, and loan-limit requirements. Down payment and cash to close depend on the current program rules and lender review. Ask an FHA-approved lender to give you the applicable handbook section and a dated written estimate for the exact home and parcel.
VA-backed financing may be available to an eligible borrower and property, subject to current VA and lender requirements. Ask a participating lender to confirm the exact home's eligibility, land and foundation requirements, occupancy, appraisal, fees, cash to close, and any lender overlays in writing. Veteran eligibility alone does not approve the property or loan.
HUD's current Title I information covers manufactured-home unit, lot, and home-and-lot loans. It says an eligible home-only unit may be classified as personal property or real estate and may be placed on an owned or leased site, subject to program, site, lease, borrower, and lender requirements. Ask an FHA-approved lender for current limits and a written eligibility and cost review.
USDA programs may serve eligible borrowers and properties in qualifying areas, but geography, income, home, site, occupancy, and lender requirements change. Check the current USDA eligibility tools and ask a participating lender to document which program and rules apply before relying on a down-payment assumption.
There is no single score for every manufactured-home loan. Program minimums, lender overlays, income, debts, down payment, property facts, and credit history all affect the decision and terms. Ask lenders to review the same file and provide current written requirements without treating a score as guaranteed approval.
Some programs combine an eligible home and lot, including HUD Title I's described home-and-lot option. Each program and lender has current rules for the land, home, installation, appraisal, borrower, timing, and disbursement. Ask lenders to explain whether they finance land acquisition, site work, the unit, and construction-period costs in one transaction.
Lender participation and products change. Ask banks, credit unions, housing counselors, dealers, and program directories for current options, then verify licensing and compare written terms. Give every lender the same home, title or registration, land, foundation, occupancy, condition, and borrower facts.
Possibly, but recording foundation documents does not guarantee a refinance. First confirm the HCD, enforcement-agency, County, title, land, lien, tax, and foundation records. Then ask lenders which programs accept the home and compare current rates, fees, term, required work, appraisal, and total savings against the cost and risk of the proposed change.
A manufactured or factory-built unit may be proposed as an ADU, but the responsible city or County agency must confirm the parcel, unit classification, design, foundation, access, utilities, fire-area conditions, and permit path. Separate-conveyance options also depend on current state law and a local ordinance. Get the parcel-specific path in writing before choosing a unit.
Allowed size depends on the ADU type, parcel, existing development, current state law, and local ordinance. Ask the responsible agency for the maximum that applies to the exact proposal. Separately, current Government Code section 66311.5 bars specified impact fees on an ADU with 750 square feet or less of interior livable space; it does not establish the maximum ADU size or eliminate every fee.
No. Current California Government Code section 66311.5 says a local agency, special district, or water corporation may not impose an impact fee on an ADU with 750 square feet or less of interior livable space. For an ADU over 750 square feet, impact fees must be proportionate to the ADU and primary dwelling square footage. The statute treats connection fees and capacity charges separately, so request an itemized agency estimate.
Owner-occupancy rules depend on the proposed ADU type and current state and local provisions. Ask the responsible city or County agency to confirm the rule for the exact parcel and proposal before relying on an occupancy or rental assumption.
Separate conveyance may be possible only when current state requirements and the local jurisdiction's adopted ordinance allow it and the proposed transaction completes all required subdivision, condominium, lienholder, utility, tax, and other steps. Confirm the current ordinance and parcel path with the responsible agency and qualified legal, title, tax, and lending professionals before using a future sale in the project plan.
Requirements depend on the unit classification, parcel, jurisdiction, foundation, site work, utilities, and fire area. Ask the responsible city or County agency for a current written submittal checklist, and have each provider identify who supplies plans, submits permits, coordinates inspections, and completes any HCD records.
Build the schedule from confirmed milestones for agency review, corrections, utility coordination, site work, foundation, factory production, transport, installation, inspections, and occupancy approval. Ask each responsible party for current dates after the plans and scope are known, and keep contingencies for dependencies they do not control.
Sometimes, but compare complete proposals for the same size, finish, design, foundation, utilities, permits, site work, financing, exclusions, and schedule. A lower factory unit price does not establish a lower completed-project cost on a particular parcel.
It depends on the jurisdiction. San Diego City, for example, has specific short-term rental permit requirements and caps on non-hosted STRs. Unincorporated San Diego County has its own rules. The ADU itself does not create any barrier to short-term rental use if local ordinances allow it, but you will need to comply with wherever the property is located. We recommend verifying STR rules before building with rental income assumptions.
A JADU is created entirely within the existing walls of a primary residence (up to 500 square feet) and cannot be a separate manufactured home. Regular ADUs, including detached manufactured home ADUs, are separate structures on the same lot. For manufactured homes, you are almost always looking at a detached ADU, which is the 1,200 square foot maximum unit type. JADUs are a site-built conversion concept, not applicable to factory-built detached units.
These terms get used interchangeably but they mean different things. A manufactured home is built entirely in a factory to the federal HUD code and is delivered on a permanent chassis. A modular home is also factory-built but to state and local building codes, arrives in sections, and is set on a foundation like a site-built home. A mobile home is an older term for factory-built units constructed before June 15, 1976, before HUD standards existed. Prefab is a general umbrella term that includes all factory-built housing.
No. California law treats factory-built housing and HUD-code manufactured homes as different classifications with different approval and record paths. Ask the manufacturer for the unit classification and approved plans, then ask the local building authority, title or escrow professional, assessor, and lender how the completed property will be handled. Do not infer appraisal or financing from the marketing label alone.
California law defines a mobilehome as a qualifying structure manufactured before June 15, 1976; newer qualifying structures are manufactured homes. A pre-1976 unit can still be sold, subject to its records, condition, location, park, and transaction requirements. Financing and relocation options vary. Current County PDS103 also permits specified mobilehomes built from September 15, 1971 through June 14, 1976 on private lots in County jurisdiction when all listed requirements are met.
HUD certification means the home was built in a factory under the U.S. Department of Housing and Urban Development's Manufactured Home Construction and Safety Standards, which took effect June 15, 1976. A HUD-certified home has a red certification label on each section (distinct from the data plate inside). This label is the key to financing, permitting on private land, and park placement. Without it, your financing and placement options are severely limited.
Quality depends on the approved design, materials, factory work, transport, installation, site work, finish work, and maintenance. Compare specifications and warranties in writing, inspect the completed home, and avoid treating factory-built or site-built as a quality grade by itself.
A double-wide is a manufactured home built in two sections and joined at the site to create a wider floor plan, typically 24 to 32 feet wide and 600 to 2,000 square feet. Single-wides are one section, typically 14 to 18 feet wide. Triple-wides and larger multi-section homes also exist. For private land placements in San Diego County, double-wides are the most common choice because they offer traditional home proportions and are still easier and faster to place than site-built construction.
Appearance is not a reliable classification test. Check the certification labels and data plate, manufacturer documents, HCD registration or foundation records, permits, and title documents. In unincorporated County jurisdiction, PDS103 includes exterior, roof, and overhang provisions plus stated exceptions and waiver paths; those rules are not a universal city standard.
A manufactured home is a full-size primary residence built to HUD standards, typically 600 to 2,000 square feet or more. A tiny home is a general term for small dwellings, often under 400 square feet, that may be built on wheels (a recreational vehicle legally) or on a foundation. Factory-built tiny homes occupy a gray zone. HUD-certified manufactured homes have clear legal status for financing, titling, and permitting. Tiny homes on wheels do not qualify for conventional real property financing.
Both can work well. Modular is simpler from a financing and permitting standpoint because it is treated like site-built from day one. Manufactured homes have more park placement flexibility and usually lower upfront costs. If you are placing on private land and want the cleanest financing path, modular often wins. If you are budget-constrained or considering a park placement, manufactured is the more relevant category. We help buyers think through which is the right fit for their specific situation.
There is no dependable lifespan for every home. Build quality, transport and installation, foundation movement, roof and envelope condition, plumbing and electrical systems, moisture, alterations, maintenance, and exposure all matter. Hire an experienced inspector and budget from the specific home's condition rather than its category or age alone.
You will need a building permit from San Diego County (or the applicable city) for the foundation, a mechanical permit for utilities, and an electrical permit. The factory-built home itself requires a California HCD insignia issued at the factory. A local building inspector inspects the site work and installation. Depending on the parcel, you may also need a grading permit, septic system permit, or encroachment permit for the driveway.
Section 6506 is part of the County of San Diego Zoning Ordinance, not the California Health and Safety Code. Current County PDS103 applies it to private lots in unincorporated County jurisdiction and lists eligibility, zoning, foundation, exterior, fire-area, roof, overhang, permit, and other requirements. Its roof-pitch and overhang provisions include stated exceptions and Director waiver paths. Incorporated cities use their own rules.
Foundation requirements depend on the home, site, jurisdiction, installation path, and financing program. Current County PDS103 addresses designated foundation systems for its private-lot process in unincorporated County jurisdiction. Ask the responsible agency, engineer, manufacturer, installer, and lender to identify the required design, inspections, and records before choosing a system.
Form 433A is part of California's foundation-system documentation. HCD says that after the required documents are recorded, the home is no longer registered by HCD. Ask HCD, the enforcement agency, County records, title or escrow, the assessor, and the lender to confirm the completed record and its effect on the specific transaction. The form alone does not guarantee a loan, tax result, or resale treatment.
Timing depends on jurisdiction, application completeness, corrections, zoning, grading, environmental and fire review, utilities or septic, foundation plans, and agency workload. Ask the responsible agency for the current submittal steps and status milestones. Do not order or schedule around an assumed approval date without written protections in your agreements.
In some cases yes. Many agricultural and rural residential zones in unincorporated San Diego County allow a manufactured home as the primary dwelling for the property owner or a farm worker. The parcel must meet minimum size requirements for the zone. Check the specific zone designation and the county zoning code before purchasing agricultural land with the intent of placing a home. We can help you verify this before you make a land purchase commitment.
Many HOAs in San Diego County restrict or prohibit manufactured homes even if county zoning allows them. CC&Rs (covenants, conditions, and restrictions) are private contractual agreements that run with the land and are separate from zoning. Before purchasing a lot in a subdivision with an HOA, review the CC&Rs carefully. Many older subdivisions that predate common manufactured housing placement specifically prohibit it.
The responsible agency and engineer determine whether geotechnical information is required for the parcel and design. Ask what investigation and report scope is needed before ordering one. Use the results to define foundation, grading, drainage, and retaining work before comparing construction prices.
Yes. Replacing an existing site-built or older mobile home with a new HUD-certified manufactured home is common in San Diego County. You will need demolition permits for the existing structure and building permits for the new placement. For pre-1976 mobile homes, disposal of the old unit is an additional cost line. The replaced home's lot coverage and setbacks are re-evaluated against current code, which occasionally creates complications on smaller lots.
First identify which water, wastewater, power, and fuel options the responsible agencies and utilities allow for the parcel. Obtain service-availability letters or feasibility findings, then price wells, storage, treatment, septic, line extensions, trenching, meters, equipment, permits, and ongoing maintenance as applicable. Do not assume an off-grid system will be approved.
Land & Home SD is a referral service, not a dealer or contractor. The buyer consultation is free. We provide information and connect customers with independent local manufactured-home professionals. You choose the provider, and your contract, price, work, licensing, and warranties are handled directly with that provider.
Start with a clear picture of your situation: do you own land or are you buying land and a home together, are you looking at a park placement or private land, what is your budget including site work, and what is your financing situation. Those four answers determine everything else. If any of them are unclear, that is where we start when you call us.
Build the schedule from the actual financing, park or land approval, design, agency review, factory availability, site work, delivery, utility, inspection, and closing milestones. Ask each responsible party for current dates after the scope is known and avoid committing to occupancy based on a generic timeline.
The process runs in roughly this order: verify zoning and parcel suitability, secure financing, select a manufacturer and model, order the home, pull permits (foundation, utilities, building), complete site prep and foundation, receive and set the home, complete utility connections, pass final inspection, and record HCD Form 433A for real property conversion. Most buyers work with a general contractor who coordinates the site work trades and a licensed dealer who manages the factory order and delivery.
Ask whether the home includes delivery and setup in the quoted price. Ask who pulls the permits and who is the responsible party for the foundation and utility connections. Ask for the HUD certification label number and factory warranty terms. Ask for references from buyers who placed homes on private land in San Diego County specifically. A dealer who cannot answer those questions confidently needs more scrutiny.
Use the park, permit, manufacturer, lender, and contract requirements to define the work first. Then verify that each proposed dealer, installer, contractor, engineer, or specialty trade holds the licenses required for its assigned scope. Put responsibility for permits, coordination, inspections, schedule, exclusions, and warranties in writing.
Inspection responsibility and sequence depend on the unit classification, jurisdiction, foundation, utilities, permit set, and installation program. Ask the responsible agency for the inspection card or schedule and ask each provider who requests, attends, documents, and corrects each inspection. Do not conceal work before the required inspection is complete.
Yes. Most manufacturers offer significant customization at the order stage: floor plan modifications, exterior finishes, roofing material, cabinetry, countertops, flooring, and appliance packages. Structural modifications are limited by HUD code requirements. Changes become much harder and more expensive after the home leaves the factory, so work through the options carefully before signing the factory order.
A park conversion happens when a mobile home park owner sells or converts the land, often to condominium lots that residents can purchase or to a different use entirely. California has protections under the Mobilehome Residency Law requiring advance notice, but a park conversion can ultimately displace residents. If you are buying a manufactured home in a park, ask about the park's ownership, age, lease length, and any known conversion plans. A long-term ground lease or resident-owned park reduces this risk.
Not always. Park resales are often handled directly between buyer, seller, and sometimes the park manager. A licensed California real estate agent who has experience with manufactured housing transactions can add value, especially in understanding the park's lease terms and the home's title status. For private land placements, a real estate agent who knows manufactured housing is helpful when the land is part of the transaction.
Read the full lease agreement, not just the summary. Key things to check: the initial term and renewal options, rent increase provisions (California has some protections but parks vary widely), rules on home modifications and landscaping, approval requirements for resale, and any provisions about the park converting to another use. A short-term lease or one with very broad rent increase provisions is a material risk.
Possibly, but first confirm that the home can be released, transported, accepted at the destination, permitted, installed, insured, and financed. Obtain written scopes for inspections, utility disconnection, permits, escorts, transport, foundation, setup, reconnection, repairs, and records before using relocation in the purchase plan.
We'll walk through your specific situation, explain your options, and point you toward the right next step, no obligation.