# ADU Builder & Home Additions in West Covina, CA [Browser-friendly HTML version](https://www.remodelyourvibe.com/website-guide/pages/services/adus-additions/west-covina/index) Source: https://www.remodelyourvibe.com/services/adus-additions/west-covina Last modified: 2026-09-24T00:00:00.000Z Text part: 1 of 1 [Full website text index](https://www.remodelyourvibe.com/llms-full.txt) | [Services by city](https://www.remodelyourvibe.com/llms/services-by-city-005.txt) | [Previous page](https://www.remodelyourvibe.com/llms/pages/services/adus-additions/covina/index.txt) | [Next page](https://www.remodelyourvibe.com/llms/pages/services/adus-additions/walnut/index.txt) --- Image: Detached backyard ADU with wood siding and black-framed glass doors at dusk 1. [Home](https://www.remodelyourvibe.com/) 1. [Services](https://www.remodelyourvibe.com/services) 1. [ADUs & Additions](https://www.remodelyourvibe.com/services/adus-additions) 1. West Covina Design · Permit · Build ### ADUs & Additions in West Covina Detached ADUs, garage conversions and additions, from plans to move-in. [Book a Consultation](https://www.remodelyourvibe.com/contact-us) [Call 818-300-2393](tel:+18183002393) #### Built for West Covina Homes West Covina's first housing tract, Sunkist Village, replaced farmland in 1941 near today's Orange and Cameron avenues, and between 1950 and 1962 the population climbed from about 4,500 to nearly 55,000, in an era when single-story ranch-style homes filled the city. The next chapter came in the San Jose Hills on the southeast side, where subdivisions along Hillside Drive in the 1970s and 1980s clustered homes on large lots and left steep slopes and valleys as city-owned open space. Those two eras still frame a backyard plan here: on the flatter tract lots, five-foot pool setbacks and rear yard coverage limits set the layout, while hillside pads bring slope rules, separate grading and retaining wall permits and, in parts of the hills, a mapped fire hazard zone. In Woodside Village, a network of paseos links homes to nearby parks, shops and transit. The zoning code sets single-family minimum lot areas from 6,000 square feet under the R-1-6,000 designation up to 40,000 square feet under R-1-40,000, and caps total building coverage and floor area on a sliding scale tied to lot size. The Hillside Overlay, which the General Plan places in the San Jose Hills on the city's southeast side and describes as mostly developed, allows one home per gross acre. Subdivisions generally along Hillside Drive in the 1970s and 1980s used its density transfer, clustering homes on lots of at least 20,000 square feet and creating city-owned Landscape Maintenance District open space, generally steep slopes and valleys, that totals 207 acres in the San Jose Hills. We are a design-build team, which means the people who draw your project are the people who build it. Design, engineering, permits and construction run through one project manager and our own crews, so nothing gets lost in a handoff between a salesperson and a subcontractor. We are licensed, bonded and insured, [CSLB license #1119054](https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1119054) . Permits in West Covina: Building permits come from the Building Division of the Community Development Department, which takes applications, plans and supporting documents through its One Stop Building Permit Center portal. Grading needs its own permit from the City Engineer, and that permit does not cover retaining walls, which carry separate permits and fees. Municipal Code Section 26-46 sets pools and spas at least five feet from interior side and rear property lines, measured to the back of the bond beam, and keeps pool equipment five feet from side and rear lines, out of the front yard and screened from public right-of-way views. ADUs that meet the code's standards are approved ministerially, without a public hearing, through a Second Unit Review, and still need a building permit. Permit details checked September 2026 against [City of West Covina](https://www.westcovina.gov/228/Building-Division) and [West Covina Municipal Code](https://library.municode.com/ca/west_covina/codes/code_of_ordinances) . Rules change, so we confirm them again for your parcel. What We Build - Hillside Overlay pad and slope planning - Five-foot pool and equipment setbacks - Second Unit Review ADU submittals - Class B roofing on new structures and additions - Separate grading and retaining wall permits - Detached ADUs, ground-up - Garage conversions to living space - Junior ADUs within the main house - Room additions and bump-outs - Second-story additions - Full kitchens and bathrooms in the ADU - Separate utility metering where required - Private entries, patios and landscaping - Plans, engineering and city submittals - Title 24 energy compliance Local Conditions #### What to Know in West Covina These local conditions change the scope, the schedule and the budget. 01 In the Hillside Overlay, Section 26-59 requires any substantial area of slope steeper than 45 percent to stay essentially natural and ungraded and calls for minimal grading above 35 percent wherever possible. Lots there with graded pads must keep a substantially flat strip at least ten feet deep between the back of the house and the slope for pedestrian and emergency access, where a one-story open patio cover is allowed. 02 A house that steps down a natural slope of at least 15 percent may reach 35 feet overall, with no point on its perimeter above 25 feet, through an administrative permit backed by a licensed surveyor's topographic survey. A pad created with more than two terracing retaining walls, or with walls over four feet high, does not qualify for that allowance. 03 The State Fire Marshal's local responsibility area map for the city, dated March 24, 2025, shows High and Moderate Fire Hazard Severity Zones across part of the hills east of Azusa Avenue and a small Very High pocket at the eastern edge, while most of the city is unzoned. Citywide, new buildings, room additions and reroofs covering more than a quarter of a roof within 12 months need at least a Class B fire-rated roof covering. 04 The required rear yard is 15 feet deep on lots up to 7,500 square feet and 25 feet on larger lots. Sixty percent of it must stay open, and the other 40 percent may hold single-story construction no taller than 15 feet, which limits how much cabana, pavilion or covered kitchen can sit in that zone. A front yard pool is possible only through an administrative permit that requires five-foot setbacks to neighbors, a City Engineer finding of no line-of-sight safety concern and a finding that the lot's layout justifies it. Areas we serve in West Covina:South HillsWoodside Village Investment #### What It Costs in West Covina Real Southern California price ranges, not teaser numbers. ##### Detached ADU $150,000 to $400,000+ What moves it: square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build ##### Garage conversion ADU $80,000 to $180,000 What moves it: whether the existing slab and framing meet current code, how far utilities have to run, and the finish level of the kitchen and bathroom ##### Plans, drawings and permit management $4,500 to $25,000+ What moves it: project type and size, whether structural engineering, Title 24 or a soils report is required, and how many jurisdictions or review bodies are involved Your lot, access and finishes set the price. We walk the site, then show you where every dollar goes. [Get a line-item price for your West Covina property](https://www.remodelyourvibe.com/contact-us) The Process #### How We Work in West Covina 01 ##### Feasibility We check lot size, setbacks, utilities and access to confirm what your property will actually support. 02 ##### Design & 3D Layout, elevations and finishes, modeled in 3D so you approve the unit before submittal. 03 ##### Plans & Permits We prepare the full drawing set, handle engineering and Title 24, and manage the city submittal and corrections. In West Covina that submittal goes to City of West Covina Community Development Department, Building Division. 04 ##### Foundation & Framing Site prep, foundation, framing and dry-in by our own crews. 05 ##### Systems & Finishes Electrical, plumbing, HVAC, insulation, then kitchen, bath and interior finishes. 06 ##### Final Inspection We pass final inspection, walk the unit with you and hand over the keys. Questions #### What West Covina Homeowners Ask Who issues the permits for this work in West Covina? City of West Covina Community Development Department, Building Division. Building permits come from the Building Division of the Community Development Department, which takes applications, plans and supporting documents through its One Stop Building Permit Center portal. Grading needs its own permit from the City Engineer, and that permit does not cover retaining walls, which carry separate permits and fees. Municipal Code Section 26-46 sets pools and spas at least five feet from interior side and rear property lines, measured to the back of the bond beam, and keeps pool equipment five feet from side and rear lines, out of the front yard and screened from public right-of-way views. ADUs that meet the code's standards are approved ministerially, without a public hearing, through a Second Unit Review, and still need a building permit. We prepare the drawings, make the submittal and handle plan-check corrections ourselves, so you are not the one chasing plan check. What makes building in West Covina different? The zoning code sets single-family minimum lot areas from 6,000 square feet under the R-1-6,000 designation up to 40,000 square feet under R-1-40,000, and caps total building coverage and floor area on a sliding scale tied to lot size. The Hillside Overlay, which the General Plan places in the San Jose Hills on the city's southeast side and describes as mostly developed, allows one home per gross acre. Subdivisions generally along Hillside Drive in the 1970s and 1980s used its density transfer, clustering homes on lots of at least 20,000 square feet and creating city-owned Landscape Maintenance District open space, generally steep slopes and valleys, that totals 207 acres in the San Jose Hills. One local condition that shapes the work: In the Hillside Overlay, Section 26-59 requires any substantial area of slope steeper than 45 percent to stay essentially natural and ungraded and calls for minimal grading above 35 percent wherever possible. Lots there with graded pads must keep a substantially flat strip at least ten feet deep between the back of the house and the slope for pedestrian and emergency access, where a one-story open patio cover is allowed. Which parts of West Covina do you work in? All of it, including South Hills and Woodside Village. Our crews run every job out of our Cahuenga Pass base in Los Angeles, with our own people on site. What does an ADU or addition cost in West Covina? Detached ADU: generally $150,000 to $400,000+ across Southern California. What moves it is square footage, finish level, utility runs, and site access; garage conversions typically run well below a ground-up detached build. We give line-item pricing after seeing the site rather than quoting a number over the phone. How long does an ADU take start to finish? Plan a realistic year. Design and engineering typically take one to three months, city plan check and corrections add several more, and construction usually runs four to eight months depending on size and site access. Is a garage conversion cheaper than a detached ADU? Usually yes, and often substantially, because the foundation, walls and roof already exist. The trade-offs are that you lose the garage, and older slabs and framing sometimes need upgrading to meet current code. Can I rent the ADU out? California ADU law is designed to allow long-term rental, and an ADU is one of the few ways to add rentable square footage to a single-family lot. Short-term rental rules vary by city, so confirm your local ordinance before counting on that income. Do you handle the permits? Yes. Plans, engineering, Title 24 and the city submittal are all handled in-house, including responding to plan-check corrections. That is a service we sell on its own, so it is not something we hand off. #### More Services in West Covina [Pool & Spa Remodeling in West Covina](https://www.remodelyourvibe.com/services/swimming-pool-spa/west-covina) [Backyard & Outdoor Living in West Covina](https://www.remodelyourvibe.com/services/exterior-remodeling/west-covina) [Everything we build in West Covina](https://www.remodelyourvibe.com/service-areas/west-covina) #### ADUs & Additions Nearby [ADUs & Additions in Walnut](https://www.remodelyourvibe.com/services/adus-additions/walnut) [ADUs & Additions in Covina](https://www.remodelyourvibe.com/services/adus-additions/covina) [ADUs & Additions in Diamond Bar](https://www.remodelyourvibe.com/services/adus-additions/diamond-bar) [ADUs & Additions in Glendora](https://www.remodelyourvibe.com/services/adus-additions/glendora) [ADUs & Additions in Arcadia](https://www.remodelyourvibe.com/services/adus-additions/arcadia) Planning Guides #### Before You Build in West Covina Costs, materials and process notes from our own projects. [ADU Cost Breakdown by Size in Los Angeles A detached ADU in Los Angeles runs $150,000 to $400,000-plus. Here is the real cost broken down by unit size, with the soft costs, utility work and finish decisions that move the number. Read guide](https://www.remodelyourvibe.com/articles/adu-cost-breakdown-by-size-los-angeles) [Garage Conversion to ADU: The Step-by-Step Build A garage conversion runs $80,000 to $180,000 in Southern California. Here is the real sequence, from slab testing and plan check to the raised floor, the mini-split and final sign-off. Read guide](https://www.remodelyourvibe.com/articles/garage-conversion-adu-step-by-step) [ADU Rental Income Math in the San Fernando Valley A one-bedroom ADU in the San Fernando Valley rents for roughly $2,100 to $2,900 a month. Here is the honest arithmetic on payback, carrying costs and what the unit adds to the property. Read guide](https://www.remodelyourvibe.com/articles/adu-rental-income-san-fernando-valley) [Second Story Addition vs Building Out: Which Costs Less Building out runs $350 to $500 per square foot. Going up runs $450 to $700. Here is when the cheaper option is actually the wrong one, and what drives each number. Read guide](https://www.remodelyourvibe.com/articles/second-story-addition-vs-building-out) #### Planning an ADU in West Covina? Sit down with your project manager and get an accurate estimate. We call you back within one business day. [Book a Consultation](https://www.remodelyourvibe.com/contact-us) [818-300-2393](tel:+18183002393) Licensed, bonded & insured · [CSLB license #1119054](https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/LicenseDetail.aspx?LicNum=1119054) --- End of text part 1 of 1. This page is complete.