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Who They're For and What They Solve
A granny flat is a self-contained secondary dwelling built on the same residential lot as a primary home. It includes its own entrance, kitchen, bathroom, and sleeping area, functioning as a fully independent living space while remaining on one title. Granny flats are built to the same residential code standards as any permanent structure.
Homeowners typically build granny flats for one of three reasons: to house an aging parent nearby without sacrificing independence, to create a private space for an adult child, or to generate rental income from an underutilized portion of their property. The right design depends on lot size, existing structures, and how the space will be used.
Left unaddressed, the need for secondary housing rarely resolves itself. Families pay for separate rentals, parents move into facilities earlier than necessary, and underused lots generate no return. A properly built granny flat solves all three problems with a single, permanent investment. If your project qualifies as an ADU under local code, our ADU construction, explains how that designation affects design, permitting, and financing options.
Our Services
We build every type of granny flat, from fully detached structures to compact studio conversions. Every project is permitted, engineered, and built to last.
A standalone structure built separately from the main home, with its own foundation, utilities, and entrance. Detached builds offer the most privacy and flexibility in layout. Best suited for larger lots where separation between dwellings is a priority.
An addition connected to the primary residence, sharing one wall while maintaining a private entrance and fully independent interior. Attached builds cost less than detached and work well on narrower lots where a separate footprint is not practical.
An existing garage transformed into a livable dwelling through insulation, plumbing, electrical, and interior finishing. Garage conversions are the most cost-efficient path to a granny flat when the structure is sound and the footprint fits the intended use.
A compact, single-room layout combining living, sleeping, and kitchen functions in one open space. Studio builds are ideal for single occupants, smaller lots, or clients who want a functional unit at the lowest possible build cost.
Not sure which type fits your property? We assess the lot, the existing structures, and your goals, then recommend only what makes sense. No upsells.
Why Homeowners Choose Mr. Local Services
Design, permits, engineering coordination, and construction, all handled by one team. You have one point of contact from first call to final walkthrough. No subcontractor juggling, no gaps in communication.
Every project begins with a detailed written quote covering all labor, materials, and permit fees. The number you see before we start is the number you pay. No surprises at the end.
Mr. Local Services holds a current General Contractor License and carries $2M general liability insurance plus workers' compensation on every job. Your property and your investment are protected.
If anything is not right at final inspection, we fix it, no charge, no argument. We have built our reputation on finishing jobs correctly, and we stand behind every granny flat we deliver.
How It Works
Call 951-458-6466 and we will schedule a site visit within 48 hours. We assess your lot, discuss your goals, and answer every question before anything is committed.
We develop a design that fits your lot and your budget, then deliver a detailed written quote covering all costs. No vague estimates, a real number before work begins.
We handle all permit applications, engineering submissions, and approval coordination. Most permits are secured within 4–8 weeks depending on project type.
Our licensed crew builds to plan, on schedule. We manage every trade on site and walk you through the completed dwelling at final inspection before we consider the job done.
Pricing
Granny flat construction typically ranges from $80,000 to $180,000 depending on type, size, and finish level. Here is what drives the number:
We provide a detailed written quote before any work begins. Call 951-458-6466 to schedule a free site assessment and get a real number for your specific property.
Most granny flat projects take 12–20 weeks from signed contract to final inspection. Permit approval timelines are the primary variable — typically 4–8 weeks.
Yes. All permanent granny flat construction requires building permits and must meet residential code. Mr. Local Services manages the entire permit process on your behalf.
The terms are often used interchangeably. ADU is the formal zoning classification; granny flat is the common name. Designation affects permitting rules and, in some cases, financing options.
In most cases, yes. Rental eligibility depends on zoning classification and local regulations. We advise on this during the consultation so you can plan accordingly.
All labor, materials, permit fees, and engineering costs are itemized in the quote. The number you receive before we start is the number you pay — no additions without your written approval.
We assess your lot, existing structures, and goals during the free site visit. We recommend the type that fits your space and budget — not the most expensive option. To see the full range of residential building services we offer, visit the Mr. Local Services home. If you are also considering a larger build, our custom home builderfull residential construction from foundation to finish.
Our satisfaction guarantee covers any defect or unfinished item identified at final inspection. We return and correct it at no charge, no conditions, no argument.
A granny flat is one of the highest-return investments a homeowner can make. Mr. Local Services delivers it fully permitted, professionally built, and backed by a written guarantee.
