Build More Living Space Into Your Property
Custom ADU construction planned around your property, your goals and the way the new space will actually be used. From design coordination and permits through construction and final finishes, our team manages the project from the ground up.
More Than an Addition. A Complete Home on Your Property.
An accessory dwelling unit creates independent living space on a property that already has a primary residence. Depending on the property and applicable requirements, that can mean a detached backyard ADU, an attached unit or the conversion of qualifying existing space.
A well planned ADU needs more than a floor plan. Foundation, structure, utilities, energy requirements, windows, roofing, kitchen, bathroom, storage and exterior details all need to work together as one complete residence.
Custom Construction Kitchen Bath & Floors coordinates the project from the early planning stages through construction so homeowners have one team looking at the entire build.
One Property. More Possibilities.
The right ADU depends on what you want the additional space to accomplish now and how you may want to use it later.
Independent Living Space
Create a complete secondary residence with its own living, sleeping, cooking and bathroom areas.
Space for Family
Give family members greater independence while keeping them close to the primary home.
Long Term Flexibility
Thoughtful layouts can adapt as the way your household uses the additional space changes over time.
Custom Design
Plan the layout, kitchen, bathroom, windows, storage and finishes around the intended use of the unit.
Rental Possibilities
Depending on applicable requirements and your plans, an ADU may provide an additional long term housing option.
A Complete Residence
Kitchens, bathrooms, climate control, utilities and private access give the unit the function of an independent home.
See What Happens Before the Finishes Go In
A completed ADU only shows the final stage. These construction images give homeowners a closer look at the structural work and progression involved in building additional living space.
The Structure Comes Before the Finishes
Homeowners naturally picture the finished kitchen, bathroom and living area. Before those details can be installed, the building itself has to be created correctly.
The ADU Takes Shape
Framing establishes walls, openings, ceilings and roof structure and begins defining the finished rooms.
The Work Inside the Walls
Plumbing, electrical, mechanical work and other systems are coordinated before the walls are closed.
The Building Moves Toward Completion
Roofing, exterior protection, windows, doors and finish preparation bring the structure closer to its completed form.
What Goes Into Building an ADU
An ADU is a complete residential construction project. Each stage needs to coordinate with the plans, applicable requirements and the work that follows it.
Planning & Design
Property conditions, size, layout, access, kitchen, bathroom and exterior design are considered before construction.
Plans & Permits
Architectural and required technical plans are coordinated for plan review and permitting.
Foundation & Structure
Site work, foundation, framing and structural components establish the physical shell of the residence.
Building Systems
Plumbing, electrical and mechanical systems are coordinated with the approved layout and construction.
Exterior Envelope
Roofing, windows, doors, weather protection and exterior finishes complete and protect the building.
Interior Completion
Drywall, flooring, cabinetry, countertops, bathroom tile, fixtures and finish work complete the interior.
One Project From the First Conversation to Completion
Understand the Property
We begin with your property, your goals for the ADU and the type of living space you want to create.
Plan & Permit
The layout and construction documents are developed around the property and applicable requirements before moving through review and permitting.
Build & Complete
Construction progresses through foundation, framing, building systems, inspections and finishes until the new living space is complete.
Good Construction Starts Long Before the Cabinets Go In.
Framing is one of the stages where the drawings become a physical building. Wall locations, window and door openings, ceiling conditions and structural components begin defining the finished rooms.
The work also needs to anticipate what comes next. Plumbing, electrical, HVAC, insulation, cabinetry and fixtures all interact with the structure in different ways.
That is why we look at an ADU as one coordinated construction project rather than a collection of unrelated trades.
What Happens During the Build
A ground up ADU moves through a series of connected construction phases. The week ranges below are included to help homeowners understand the general progression of a project and should be viewed as approximate planning ranges rather than guaranteed dates.
Site Preparation & Demo
The work area is prepared for construction. Applicable demolition, debris removal, access and site preparation take place before foundation work begins.
Foundation & Underground Plumbing
Excavation, forms, reinforcement, applicable underground plumbing and drainage work are coordinated before the foundation is completed.
Framing & Windows
Walls, roof structure, window openings and door openings are framed according to the approved plans and structural requirements.
Rough Plumbing, Electrical & Mechanical
Plumbing lines, electrical wiring, outlets, lighting locations, panel work and mechanical systems are coordinated before the walls are closed.
Roofing & Exterior Protection
Roofing and applicable exterior weather protection move the structure toward a protected building envelope.
Insulation & Drywall
After applicable rough inspections, insulation is installed as required and the interior moves into drywall and wall preparation.
Wall Preparation & Paint
Drywall finishing, patching, surface preparation, primer and paint prepare the interior for finish installations.
Flooring, Baseboards & Doors
Flooring, interior doors, trim and baseboards begin giving the interior its finished character.
Kitchen Cabinets & Countertops
Cabinetry is installed and countertops, hardware, backsplash and related kitchen details are coordinated.
Bathroom Tile & Finishes
Bathroom tile, vanity, plumbing fixtures, mirrors and other bathroom finish components move toward completion.
Electrical, Plumbing & Mechanical Finishes
Light fixtures, outlets, switches, faucets, toilets and applicable mechanical finish components are installed.
Exterior Details & Final Completion
Remaining exterior details, final finish items, cleanup and applicable final inspections bring the project toward completion.
The week ranges above are rough estimates provided only to illustrate how an ADU project may progress. Custom Construction Kitchen Bath & Floors does not guarantee these construction timelines. Every ADU is different in size, layout, design, site conditions, structural requirements, utility work, inspection scheduling, material selections and overall scope. Permit processing and other conditions outside the contractor's control may also affect the schedule. A project specific schedule can be discussed once the actual plans and scope of work are established.
Your Property Is Treated With the Care It Deserves.
Construction happens on your property. We never lose sight of that.
Custom Construction Kitchen Bath & Floors is a family owned and operated company. Our family has been working in residential construction since 1990, and the reputation attached to our name matters to us.
Whether we are remodeling one room or building an ADU from the ground up, we approach the property with care and respect. That means communicating throughout the project, paying attention to the surrounding home and treating the details as something we are personally responsible for.
An ADU is a substantial project and homeowners should know who is responsible for their home. Our goal is to build a relationship based on communication, accountability and work we are comfortable putting our family name behind.
How Large Can Your ADU Be?
There is no single size that applies to every ADU project. The type of ADU, property conditions and applicable state and local requirements can affect what may be built.
Rather than assuming that every property can accommodate the same size or configuration, the property and proposed project should be evaluated during planning.
Experience Across the Entire Build
36+ Years of Construction Experience
We have worked on Los Angeles homes since 1990 with experience spanning substantial remodeling and residential construction.
Planning Before Construction
Layout, materials and construction requirements are considered early so the finished building works as a whole.
Complete Interior Experience
Our remodeling background extends into the kitchen, bathroom, flooring, cabinetry, countertops and finish details that complete an ADU.
One Coordinated Project
Structure, building systems and interior finishes are considered as connected parts of one residential project.
What to Know Before Building an ADU
Understanding the early decisions can make it easier to plan the right project for your property.
What is an ADU?
An accessory dwelling unit is an independent residential unit located on the same property as a primary residence. It contains living, sleeping, cooking and sanitation facilities.
What types of ADUs can be built?
Common types include detached ADUs, attached ADUs and conversions of qualifying existing space. The right approach depends on the property and your goals.
How large can an ADU be?
ADU size depends on the type of unit, property conditions and applicable state and local standards. The property should be evaluated before assuming a particular maximum size.
Does an ADU need a kitchen and bathroom?
An ADU is an independent dwelling and includes permanent provisions for living, sleeping, eating, cooking and sanitation.
Does an ADU require permits?
Yes. ADU projects require applicable approvals and building permits. Plans are reviewed for the requirements that apply to the proposed project and jurisdiction.
Does an ADU need separate utilities?
Utility requirements depend on the type of ADU, existing services and applicable utility and jurisdictional requirements. Electrical, water, sewer and other utility needs should be considered during planning.
What happens before ADU framing begins?
For new construction, work before framing can include site preparation, excavation, underground utilities, foundation forms, reinforcement, required inspections and concrete work.
What happens after the ADU is framed?
The project typically moves into roofing, windows, exterior protection and rough plumbing, electrical and mechanical systems. Required inspections occur before applicable work is covered, followed by insulation, drywall and finishes.
How long does it take to build an ADU?
There is no guaranteed timeline that applies to every ADU. Project duration depends on design, permitting, utilities, site conditions, inspections, size, layout, complexity and material decisions.
The timeline shown on this page is provided only as a rough example of how construction phases may progress.
Can an ADU be designed to complement the main house?
Yes. Roof form, exterior materials, windows, doors, colors and architectural details can be considered so the new unit relates appropriately to the existing property.
Can you build the kitchen and bathroom too?
Yes. Custom Construction Kitchen Bath & Floors handles complete residential construction, including kitchens, bathrooms, flooring, cabinetry, countertops, tile and other interior finish work.
Where do you build ADUs?
We provide ADU construction and residential remodeling throughout Los Angeles, including communities in the San Fernando Valley and Westside.
Custom Construction Kitchen Bath & Floors is a family owned and operated California General B contractor, license #1043854, with more than 36 years of construction experience.
Have Space for an ADU? Let's See What It Could Become.
Tell us about your property and how you want to use the additional living space. We can discuss the project, construction involved and the next steps for planning your ADU.
15303 Ventura Blvd, Suite 900
Sherman Oaks, CA 91403
