How to Start a Home Renovation: A Step-by-Step Checklist for California Homeowners
The best way to start a home renovation is to decide your goals and budget first, define the scope of work, get a design and drawings, confirm permits, and only then hire a contractor and begin construction. Most costly renovation problems come from doing these steps out of order: demolition before drawings, quotes before a scope, or construction before permits. This checklist walks through the right order for California homes.
At Jean-Prescott Studio, a Newport Beach architecture and design studio serving California homeowners since 2014, we start every project at the planning stage, with design, 3D renderings, and permit processing. We provide design and permitting only; we do not perform construction. This guide shows how to plan a renovation so that the construction phase goes smoothly, with sources for every number.
Key takeaways
- Order matters. Goals, budget, scope, design and drawings, permits, then contractor and construction.
- Plan a 10% to 20% contingency for surprises, and lean toward the higher end for older homes.
- Get drawings before quotes. Contractors can only give accurate bids against a defined scope.
- Check permits early. Permitting can take months, so it belongs in your schedule from day one.
- Verify your contractor’s license with the California Contractors State License Board (CSLB) before you sign anything.
Before You Start: Define Your Goals and Scope
Planning a home renovation starts with answers to three questions: what you want to change, why, and what you can spend. Write them down before you talk to anyone.
Strategic Goals
Goals
More space, better flow, updated systems, energy efficiency, resale value, or a mix? Your top one or two goals decide where the money goes.
Detailed Scope
Scope
List every element of the work: demolition, plumbing, electrical, framing, windows, tile, fixtures, cabinetry, lighting, and painting. Relocating plumbing typically adds cost and complexity, so note any room whose layout you want to change.
Real Constraints
Constraints
Note your timeline, whether you will live in the home during the work, and any HOA, historic, or neighborhood rules.
The clearer your scope, the more accurate every later step becomes, from the design to the budget to the quotes.
Home Renovation Checklist: 10 Steps in Order
Use this checklist as your master plan. Each step builds on the previous one.
| # | Step | What to do |
|---|---|---|
| 1 | Set goals and priorities | Decide what must change and what can wait |
| 2 | Set a budget and contingency | Fix a total budget and reserve 10% to 20% for surprises |
| 3 | Define the scope of work | List every room, system, and finish involved |
| 4 | Document existing conditions | Get accurate as-built drawings and a site plan, especially for older homes |
| 5 | Design and visualize | Develop floor plans and 3D renderings, and make layout decisions on paper |
| 6 | Confirm permits and rules | Check city requirements, plus any HOA or historic rules |
| 7 | Finalize drawings and materials | Choose materials before demolition so nothing changes mid-build |
| 8 | Get detailed quotes | Compare at least three line-item proposals against the same plans |
| 9 | Hire and sign a written contract | Verify the license, and set the payment schedule and change-order process |
| 10 | Build, inspect, and close out | Pass inspections at each phase, then do the final walkthrough and punch list |
Critical Pitfall: The most common mistake is jumping from step 1 to step 8: asking for quotes before there is a scope or a design. Quotes based on a vague scope are hard to compare and tend to grow once the real work is defined.
Steps in a Home Renovation: The Order of Work
Once construction begins, the work follows a typical sequence. According to Block Renovation’s guide to renovation order (May 2026), the usual order is:
- Planning, scope review, and permits. Everything above, completed before walls open.
- Structural and systems. Foundation, framing, roof, and electrical service come first. In older homes, an electrical service upgrade can run roughly $2,500 to $5,000, according to the same guide.
- Rough-in with walls open. Wiring, plumbing runs, HVAC ducts, insulation, and blocking. A wall is open for maybe two weeks during a project.
- Inspection sign-off. Most jurisdictions require a sign-off on framing, electrical, and plumbing rough-in before drywall goes up.
- Drywall and ceilings. Then ceiling paint, recessed lighting, and crown molding. The guide recommends waiting at least 30 days after the final mud coat before painting, longer in humid conditions.
- Cabinets and built-ins. Kitchen cabinets, vanities, and custom carpentry.
- Flooring. New flooring usually goes in late in the process.
- Tile, countertops, and final wall paint.
- Fixtures and final finishes. Faucets, lights, hardware, baseboards, and the punch list.
Why Order Matters: The Financial Impact of Late Decisions
Two practical tips from the same guide show why the order matters. Adding blocking during framing costs about $5, versus about $400 to add later, and running conduit during framing costs roughly $50, versus $400 to $600 later. Relocating plumbing after the fact can start at around $3,000. These are national reference figures from one provider, not California quotes, but the lesson holds anywhere: decide in the design phase, not on the job site.
Wood Blocking
$5 during framing vs. $400 after drywall
Conduit Runs
$50 rough-in vs. $400–$600 after closing
Plumbing Relocation
Starts at $3,000+ if modified late
For exterior work, the guide recommends bundling roof, siding, windows, and gutters into one season, and says doing so can save 15% to 25% compared with doing each separately.
How to Budget for a Home Renovation
A renovation budget has more parts than construction. Include design, drawings, permits and plan check, engineering reports when needed, construction, materials, and a contingency reserve.
Contingency
10% to 20%
Block Renovation’s planning guide (November 2025) recommends setting aside 10% to 20% of the total budget, using the higher end for older homes or unknown conditions. On a $200,000 project, that means $20,000 to $40,000.
Labor
50% to 60%
The same guide says labor is usually 50% to 60% of the total budget.
Permits & Approvals
5% to 10%
Permits, HOA approvals, and inspections can consume 5% to 10% of the budget, depending on location.
Costs in California tend to run above national figures. In the 2025 Cost vs. Value Report, the same project cost roughly 4% to 7% more in Los Angeles and 12% to 23% more in San Francisco than the national average. For detailed ranges by scope, read our guide to the average cost to renovate a home. If you plan to claim any improvements on your taxes, see which home renovations are tax deductible.
Do You Need Permits and Plans?
Most renovations that change plumbing, electrical systems, walls, windows, or the layout need permits. The California Residential Code requires an owner who intends to construct, enlarge, alter, repair, or move a structure to apply to the building official for a permit first, with exemptions for finish work such as painting, tiling, and cabinets. Plumbing and electrical permits are the most common.
Layout and structural changes usually also need drawings. Two things to build into your timeline:
- Check rules beyond the city. Condo, co-op, HOA, and historic-district rules can add approvals.
- Allow time for review. Block Renovation’s guide suggests budgeting 1 to 3 months for permits and approvals, and up to six months or longer for whole-home renovations. California cities vary widely, so ask your building department for current timelines.
For a deeper look at one common case, see our guide to the bathroom remodel permit in California. If you are adding an accessory dwelling unit, state law requires the city to approve or deny a complete ADU application within 60 days; see our ADU zoning guide for Los Angeles.
Who to Hire: Designer, Architect or Contractor?
A renovation usually involves two kinds of professionals, and they do different jobs:
Design & Plans
A Designer or Architect
Defines the layout, prepares the drawings your city requires, and helps manage the permit process.
Physical Construction
A Licensed Contractor
Builds the project against those drawings.
Hiring in that order, design first and contractor second, gives you drawings that every bidder can price the same way. According to the CSLB’s homeowner checklist, keep these points in mind when you hire:
License
Contractors on California projects costing $1,000 or more in labor and materials combined must be licensed. Verify the license with CSLB’s License Check tool or by calling 800-321-CSLB (2752).
Written contract
Get a detailed written contract before work starts, and don’t sign until you understand all the terms.
Down payment
Pay no more than 10% down or $1,000, whichever is less, with limited exceptions.
Right to cancel
You have three days after signing to cancel in writing, and seniors have five.
Right to cancel
You have three days after signing to cancel in writing, and seniors have five.
Payment schedule and changes
Document each phase and its payment, hold the final payment until you are satisfied, and require change orders in writing, signed by both parties.
Permits
The contractor should pull all necessary permits.
Insurance
Ask about general liability insurance and workers’ compensation.
Get at least three detailed quotes, compare them line by line, and make sure each is based on the same plans.
How Jean-Prescott Studio Fits In
Jean-Prescott Studio handles the design side: drafting, as-built plans, 3D renderings, and plan permit processing. Our team includes a California-licensed architect. After approval, you choose a contractor to build.
How Long Does a Home Renovation Take?
Timelines depend on scope, permits, material lead times, and whether you live in the home. Block Renovation’s planning guide gives these typical durations, which are national reference ranges:
| Project | Typical duration |
|---|---|
| Bathroom | 6 to 12 weeks |
| Kitchen | 8 to 16 weeks |
| Basement | 10 to 20 weeks |
| Whole-home remodel | 6 to 12 months |
| ADU | 8 to 18 months |
These ranges cover construction and planning, and permits are a separate step: budget 1 to 3 months for approvals, longer for whole-home projects. Living in the house can lengthen the schedule. Block’s renovation-order guide says crews work shorter days with occupants at home, which can stretch a 10-week project by two or three weeks.
Renovating an Older California Home: What to Check First
If your home was built decades ago, inspect before you design. Four items come up often:
Environmental Health
Lead Paint
Lead paint is a concern in any home built before 1978. Under the EPA’s Renovation, Repair and Painting Rule, contractors paid to disturb paint in pre-1978 homes must be certified and follow lead-safe practices.
Hazardous Materials
Asbestos
The EPA lists asbestos in older homes in places such as vermiculite insulation, vinyl floor tiles and adhesives, roofing and siding shingles, and textured paint or patching compounds, and notes that exposure typically occurs when those materials are disturbed. Test suspect materials with a licensed professional before demolition.
Electrical Safety
Aluminum wiring
The U.S. Consumer Product Safety Commission reports that about 2 million homes were built with aluminum branch-circuit wiring between 1965 and 1973, and that failing connections can overheat. Have a licensed electrician evaluate any home from that period.
Earthquake Resilience
Seismic safety
The Earthquake Brace + Bolt program offers up to $3,000 toward a code-compliant retrofit of wood-framed, pre-1980 homes with a raised foundation. Registration opens only for limited periods and covers specific ZIP codes.
If your home is a mid-century, ranch, or split-level house, see our style-specific guides: mid-century modern home renovation, ranch house remodel ideas, and split-level home remodel ideas.
Common Home Renovation Mistakes
- Starting without drawings or permits. Changes made after demolition cost far more than changes made on paper.
- Skipping the contingency. Hidden conditions such as old wiring, water damage, or pest damage are common in older homes.
- Deciding systems late. Adding blocking, conduit, or relocated plumbing after the walls are closed is much more expensive.
- Choosing materials after demolition. Some selections, such as an induction cooktop, can require electrical work you did not plan for.
- Comparing unequal quotes. Bids based on different scopes are impossible to compare.
- Paying too much upfront or skipping the license check. California limits down payments, and you can check any license for free.
How Jean-Prescott Studio Helps You Start
If you are at the very beginning, a free consultation is the most useful first step. We review your goals, existing conditions, and scope, explain which permits your project is likely to need, and show you the layout in 3D before you spend on construction. Our team has completed more than 500 residential and commercial projects since 2014, and we manage design, drawings, permit processing, and plan corrections under one roof. Learn more about our home remodeling services.
Frequently Asked Questions
How do I start a home renovation?
Start by defining your goals, budget, and scope of work, then get a design and drawings, confirm permits, and only then request contractor quotes. Doing the planning first lets every contractor bid on the same plans and helps you avoid costly changes during construction.
What is the first step in a home renovation?
The first step is deciding your goals and budget. Write down what you want to change, why, and how much you can spend, including a contingency. That clarity drives the scope, the design, and every later decision.
What is the order of a home renovation?
Planning, design, and permits come first. Construction then typically runs from structural work and systems, to rough-in plumbing, electrical, and HVAC, to inspections, drywall, cabinets, flooring, tile, and final fixtures. Exact order varies by project.
How long does a home renovation take?
It depends on scope and permits. National reference ranges are about 6 to 12 weeks for a bathroom, 8 to 16 weeks for a kitchen, and 6 to 12 months for a whole-home remodel, plus 1 to 3 months or more for permits. Living in the home can lengthen the schedule.
How much should I set aside for unexpected renovation costs?
Most planning guides recommend a contingency of 10% to 20% of the total budget, leaning higher for older homes. On a $200,000 renovation, that means $20,000 to $40,000 in reserve.
Do I need an architect or designer for a renovation?
Not for every project, but layout and structural changes usually need drawings for permits. A designer or architect prepares those drawings and helps manage the permit process, so contractors can bid on the same plans. Check what your city requires for your scope.
Ready to Start Your Renovation the Right Way?
A good renovation starts on paper. Whether you are updating a single room, remodeling a whole house, or adding an ADU, Jean-Prescott Studio can help you define the scope, design the space, and handle the permit process from the first sketch to approved plans.