How the Custom Home Design Process Works: From Idea to Permit-Ready Plans

Building a custom home is one of the largest financial decisions most people ever make. The design process — getting from your vision to a set of permit-ready construction documents — is where that vision either gets built correctly or runs into expensive problems later.

This guide walks through every phase of the custom home design process as we handle it at Liberty Drafting Studios. If you are planning a new home in Greater Sacramento, this is what to expect.

Phase 1: Programming — Defining What You Want

Before a single line is drawn, you need to define what you are building. This is called the programming phase, and it is the most important conversation you will have with your designer.

What we cover in programming:

• Square footage target — how large does the home need to be? What is the maximum your budget supports?
• Bedroom and bathroom count — current needs and future flexibility
• Single story vs. two story — single story is typically more expensive per square foot but easier to live in long-term; two story fits more program on a smaller footprint
• Special spaces — home office, gym, media room, workshop, guest suite, in-law quarters
• Garage — attached or detached, how many cars, storage needs
• Outdoor living — covered patio, pool, outdoor kitchen, connection to interior
• Style preferences — contemporary, traditional, craftsman, farmhouse, Mediterranean
• Lot constraints — setbacks, easements, slope, views, solar orientation

A thorough programming conversation takes 1–2 hours. The output is a written program — a list of spaces, approximate sizes, and relationships — that guides the entire design process.

Phase 2: Schematic Design — The First Layout

With the program defined, we prepare schematic design drawings. These are preliminary floor plans and a basic site plan that show how the home fits on the lot and how the rooms are organized.

What schematic design includes:

• Site plan — the home's footprint on the lot, showing setbacks, driveway, and basic site organization
• Floor plans — room layout, approximate dimensions, door and window locations
• Basic exterior concept — a rough sense of the home's massing and style

Schematic design is intentionally not detailed. The goal is to get the big decisions right — room relationships, traffic flow, how the home sits on the lot — before investing time in details that may change.

Your role in schematic design: review the plans, ask questions, and give clear feedback. This is the easiest and least expensive phase to make changes. A wall moved in schematic design takes minutes. The same change in construction documents takes hours.

Schematic design typically takes 1–2 weeks and involves 1–2 rounds of revisions.

Phase 3: Design Development — Working Out the Details

Once the schematic layout is approved, we move into design development. This phase works out the details of every room and every system.

What design development covers:

• Refined floor plans — accurate dimensions, all rooms fully defined, built-ins and cabinetry locations
• Exterior elevations — all four sides of the home, showing roofline, window placement, materials, and architectural details
• Roof plan — ridge lines, valleys, overhangs, and drainage
• Window and door schedule — sizes, types, and locations of every opening
• Preliminary structural layout — beam locations, post locations, major structural elements
• Mechanical coordination — preliminary HVAC layout, plumbing fixture locations

Design development is where the home starts to look like a real building. By the end of this phase, you should be able to visualize exactly what you are building.

Design development typically takes 2–4 weeks.

Phase 4: Construction Documents — The Permit Set

Construction documents are the complete set of drawings and specifications that the building department reviews for permit approval and that your contractor uses to build the home. This is the most time-intensive phase of the design process.

A complete custom home construction document set includes:

Architectural drawings:

• Cover sheet with project information, code summary, and sheet index
• Site plan with topography, drainage, and utility connections
• Floor plans (all levels) with full dimensions and notes
• Exterior elevations (all four sides)
• Building sections showing wall assemblies, floor systems, and roof construction
• Interior elevations for kitchens, bathrooms, and special spaces
• Enlarged floor plans for kitchens and bathrooms
• Window and door schedule and details
• Stair details (if applicable)
• Fireplace details (if applicable)
• Finish schedule

Structural drawings (coordinated with structural engineer):

• Foundation plan
• Floor framing plan (if raised floor)
• Roof framing plan
• Structural details — connections, hold-downs, shear walls
• Structural calculations

Energy compliance:

• Title 24 energy compliance documentation — required on all new construction in California
• Insulation schedule
• Mechanical equipment specifications

Special requirements:

• Chapter 7A fire-resistant construction details (if in a fire hazard zone)
• Grading and drainage plan (if required by jurisdiction)
• Landscape plan (if required by jurisdiction)

Construction documents typically take 4–8 weeks for a custom home, depending on complexity.

Phase 5: Plan Check and Permit

Once construction documents are complete, they are submitted to the building department for plan check. The building department reviews the plans for code compliance and issues corrections — a list of items that must be addressed before the permit is issued.

What to expect during plan check:

• First plan check: 3–8 weeks depending on jurisdiction and current workload
• Corrections: Almost every project receives corrections on the first check. This is normal. Common corrections involve energy compliance details, structural connections, accessibility requirements, and fire-resistance details.
• Correction response: We prepare written responses and revised drawings addressing each correction item and resubmit.
• Second plan check: 2–4 weeks. Most projects are approved after the second check.
• Permit issuance: Once approved, permit fees are paid and the permit is issued. Construction can begin.

Total plan check timeline: 6–16 weeks from first submittal to permit issuance. Jurisdictions vary significantly — Sacramento City is typically faster than Sacramento County; Placer County and El Dorado County have their own timelines.

How Long Does the Entire Design Process Take?

From first conversation to permit in hand:

Phase	Timeline
Programming	1–2 weeks
Schematic design	1–2 weeks
Design development	2–4 weeks
Construction documents	4–8 weeks
Plan check and permit	6–16 weeks
Total	14–32 weeks

For a typical custom home, plan on 4–8 months from first meeting to permit. Complex projects, difficult sites, or jurisdictions with slow plan check can push this to 10–12 months.

What Does Custom Home Design Cost?

Design fees for a custom home in the Sacramento area typically run 3–6% of the construction cost. For a $600,000 home, that is $18,000–$36,000 in design fees. For a $1,000,000 home, $30,000–$60,000.

At Liberty Drafting Studios, we price custom home design based on the scope of the project — square footage, complexity, and the number of special systems involved. We provide a fixed-fee proposal after the programming conversation so you know exactly what the design will cost before we begin.

What is included in our fee:

• All phases from programming through construction documents
• Structural engineering coordination
• Title 24 energy compliance
• Plan check management — we handle all corrections and resubmittals
• Unlimited revisions during schematic design and design development (within the approved program)

Starting Your Custom Home Project

If you are planning a custom home in Greater Sacramento, the first step is a conversation. We will discuss your program, your lot, your budget, and your timeline — and give you a clear picture of what the design process will look like for your specific project.

There is no cost for the initial consultation.

Call David directly: 916-694-9949

We serve homeowners and developers throughout Sacramento, Placer, El Dorado, Yolo, and surrounding counties.