Skip to content
Licensed & Insured. CSLB #1092889 Serving the San Fernando Valley & the Westside Service Areas FAQ Client Support (818) 934-0075
MAMOS Construction & Design
☎ (818) 934-0075 Schedule a Consultation

Mamos Construction & Design

Backyard ADU construction in Los Angeles.

The first question is whether your lot allows one. We come out and check that at no cost. If it does, we carry the rest: drawings, permits, city corrections, inspections and the build.

Book a free site visit

Free site visit and a written quote. No charge and no obligation. Rather talk now? (818) 934-0075

Completed detached ADU in Sherman Oaks, entry walkway and landscaping
Sherman Oaks, CACompleted ADU
153+projects completed
1092889CSLB licensed contractor
Freesite visit and written quote
15 minwe call you back, 8am to 5pm Mon to Thu, 8am to 2pm Fri

Three ways to start.

You do not need a plan, a budget or a drawing to talk to us. Pick the one that sounds like you.

We come out and read the lot, free, before anything else.

Setbacks, easements, where the sewer line runs, whether the panel has capacity, how a truck gets in. These decide what you can build before any design starts, and we check each one on the visit.

  • What size and shape your property will actually take
  • Whether a garage conversion or a new detached unit makes more sense here
  • Anything on the lot that limits what you can build

It takes an afternoon and costs you nothing. Book a free site visit

Twelve steps from the site measure to final sign-off.

You do two of them.

  1. 01Site measure and feasibility
  2. 02Soils report, where the city asks for one
  3. 03Choosing the layout and the finishesYours
  4. 04Schematic design
  5. 05Title 24 energy compliance
  6. 06Structural engineering and calculations
  7. 07Construction drawings
  8. 08Signing as the property ownerYours
  9. 09Planning and building submittal
  10. 10Plan check corrections and permit issue
  11. 11Utility coordination, panel and sewer
  12. 12Construction, inspections and final sign off

We handle the other ten. You hear from us when something is approved, when corrections come back and what happens next, without having to ask.

A finished one, in Sherman Oaks.

Detached unit with a full kitchen, two bedrooms and a bathroom. Photographed after handover.

Open plan kitchen and living room in the completed Sherman Oaks ADU
Bedroom with a black framed window in the completed Sherman Oaks ADU
Second bedroom with double closet doors in the completed Sherman Oaks ADU
Bathroom with a glass walk in shower in the completed Sherman Oaks ADU
Backyard ADU in Rancho Park built by MAMOS, wood-look garage door and a concrete courtyard

Sherman Oaks and Rancho Park, CACompleted ADUs, built by MAMOS Construction & Design. See the Rancho Park ADU

From slab to stucco: a two-story ADU we built in the Valley.

Photographed during construction, in the order the work happens. The full job: two-story ADU in Encino. More Encino work: ADU construction in Encino.

Concrete slab poured for the Encino ADU
1. Slab poured
Second-floor wall framing, Encino ADU
2. Wall framing
Framing and plywood sheathing, Encino ADU
3. Plywood sheathing
Sheathed walls and windows set, Encino ADU
4. Windows set
Stucco scratch coat going on, Encino ADU
5. Stucco scratch coat
Finished exterior and entry, Encino ADU
6. Finished

Turning the garage you already have into an ADU.

A garage conversion keeps the footprint you already have and turns it into a permitted living unit. Here is what we check before we tell you whether yours is a good candidate.

  • What the structure can carry

    We check the slab, the framing and the ceiling height. Some garages convert as they stand. Others need the floor or parts of the framing brought up to what a living space requires.

  • How the utilities reach it

    A kitchen and a bathroom need supply, drainage and enough electrical capacity. Where the sewer line and the panel sit decides a lot of the work, and we map that before anything is priced.

  • What the city will ask for

    A converted garage has to meet the same code as any home: fire separation from the main house, insulation, and windows for light and escape. We draw it, file it and answer the corrections.

  • Parking

    California law does not let the city require you to replace the parking when a garage is converted into an ADU.

Not sure yours qualifies? That is the first thing we check at the site visit, and it costs you nothing to find out. Book a free site visit

Working out the money before you commit.

Four things happen before you are asked to decide anything, and none of them cost you.

  • We see the property first

    We look at the slope, access, utilities and what is already there before we price anything.

  • You get it in writing

    A written scope and price, with permit and city fees shown separately so you can see which part of the money is ours and which part is theirs.

  • We go through financing with you

    Financing options are available. We walk through them at the meeting, against your actual project rather than a generic example.

  • Then you decide, with everything in front of you

    The visit and the written quote come with no obligation. Take the numbers home and decide in your own time.

We give you a price after we have walked your lot.

Every property prices differently, and the visit takes an afternoon.

Book a free site visit Call (818) 934-0075

Questions people ask first.

Can I even build one on my property?
Usually yes. California law now allows an ADU on most single family and multifamily lots, and cities have far less room to say no than they used to. What varies is size, placement and height, and that comes down to your setbacks, easements and utilities. It is the first thing we check when we come out.
How long does the whole thing take?
Permitting and construction are two separate clocks, and the permit clock depends on your city and how clean the submittal is. We give you a realistic time range for your property and city at the site visit. What your contract should say about start and finish dates is explained here.
Do I have to move out, or move my tenant out?
For a detached unit in the backyard, almost never. The work happens outside your walls. A garage conversion is noisier and closer, and we walk you through the disruption before you commit to that route.
Can I rent it out?
In most cases yes, and it is the reason a lot of our clients build. Rules on short term rental differ from long term and differ by city, so check the specific rule for your address before you plan around the income.
What if I am nowhere near ready?
That is a good time to call. We can tell you what your lot allows and roughly what it takes, so you have something real to plan around. The visit is free, with no obligation.

Book your free site visit.

Tell us where the property is. We will call you within 15 minutes, 8am to 5pm Monday to Thursday and 8am to 2pm Friday, and find a time to come out. The visit and the written quote are free. See a finished one: a backyard ADU in Rancho Park, our ADUs in Encino, ADUs on the Westside, ADUs in West Hollywood, or ADUs in Pasadena.

MAMOS Construction & Design
Licensed California general contractor, CSLB License No. 1092889
Woodland Hills, serving the San Fernando Valley

Prefer to talk now? (818) 934-0075

We use what you send only to contact you about your project. We do not sell or share it. See our Privacy Policy.

MAMOS Construction & Design, CSLB License No. 1092889 (818) 934-0075 Privacy policy
☎ Call Schedule a Consultation