Start with a realistic budget and timeline before you hire anyone
A major renovation — kitchen, bathroom, roof, foundation work, or structural changes — costs more and takes longer than most homeowners expect. Before you call a contractor, you need three numbers: what you can actually spend, what the work will realistically cost in your area, and how long you can live with the disruption. These are not the same as what you hope to spend or what you saw on a home improvement show.
Get at least three written estimates from licensed contractors in your area. Each estimate should list the specific work, materials, timeline, and payment schedule. Do not accept a verbal quote or a single estimate. Contractors in different regions price differently, and a low estimate often means the contractor either underestimated the scope or plans to cut corners. A high estimate might reflect quality work or might be padded. Three estimates show you the actual range.
Once you have estimates, add 15 to 20 percent to the highest one as a contingency fund. This covers unexpected problems — a rotten beam behind the wall, plumbing that does not meet current code, asbestos in old insulation. These discoveries happen in most renovations. If you do not budget for them, you will either stop work mid-project or go into debt to finish.
Key Takeaways
- Get three written estimates from licensed contractors before committing to any budget, because costs vary widely by region and contractor experience.
- Add 15 to 20 percent to your highest estimate as a contingency fund for problems discovered during the work.
- Check that your contractor holds current licensing, liability insurance, and workers' compensation insurance before signing a contract.
- Understand your financing options — home equity loans, lines of credit, and cash-out refinances each have different costs and timelines.
- Obtain all required permits before work begins, because unpermitted work can affect your home's resale value and your insurance coverage.
Decide how to pay for the renovation
You have several ways to fund a major renovation, and each has different costs and timelines. The most common are a home equity loan, a home equity line of credit (HELOC), a cash-out refinance, or paying in cash from savings.
A home equity loan lets you borrow against the equity you have built in your home. You receive a lump sum, repay it over a fixed term (usually 5 to 15 years), and pay a fixed interest rate. This works well if you know the exact cost upfront and want predictable monthly payments. The downside is that you are borrowing against your home, so if you cannot repay, the lender can foreclose.
A home equity line of credit (HELOC) works like a credit card backed by your home. You can borrow up to a set limit, pay interest only on what you use, and repay on a flexible schedule. This is useful if the renovation scope might change or if you expect to discover hidden problems. The risk is that interest rates on HELOCs are usually variable, so your payment can rise if rates increase. Some lenders also freeze or reduce your credit line if your home value drops.
A cash-out refinance means refinancing your mortgage for more than you owe and taking the difference in cash. This makes sense only if current mortgage rates are lower than your existing rate, because you are replacing your entire loan. The advantage is that you lock in a fixed rate for 15 or 30 years. The disadvantage is that you restart your loan term and pay interest on the full new amount.
If you have savings, paying in cash avoids interest and debt, but it also depletes your emergency fund. Most financial advisors recommend keeping three to six months of expenses in liquid savings before using cash for a renovation.
Verify contractor licensing and insurance before you sign
A licensed contractor has passed a test, carries liability insurance, and is registered with your state or local licensing board. An unlicensed contractor may be cheaper, but if something goes wrong — a worker is injured, the work is faulty, or the contractor disappears mid-project — you have almost no recourse and may be liable yourself.
Before you hire, ask the contractor for their license number and verify it with your state's licensing board or your local building department. You can usually do this online or by phone. Ask for proof of current liability insurance and workers' compensation insurance. Liability insurance covers damage the contractor causes to your home or property. Workers' compensation covers injuries to workers on your job. If a contractor cannot or will not provide these, do not hire them.
Get a written contract that includes the scope of work, materials to be used, start and end dates, payment schedule, and what happens if the contractor does not finish on time or to specification. The contract should also state who is responsible for obtaining permits and who cleans up debris. A vague or verbal agreement is the most common source of disputes between homeowners and contractors.
Understand permit requirements in your area
Most major renovations require a permit from your local building department. A permit means an inspector will visit during and after the work to verify that it meets building code. This protects you: code exists because it prevents fires, collapses, electrical hazards, and other serious problems.
Unpermitted work can create problems when you sell your home. A buyer's inspector or lender may discover it, and you may have to disclose it. Some lenders will not finance a home with unpermitted major work. Your homeowners insurance may also deny a claim if the damage is related to unpermitted work.
Call your local building department or visit their website to learn what work requires a permit in your area. Typically, electrical work, plumbing, structural changes, roof replacement, and foundation work all need permits. Painting and flooring usually do not. The building department can tell you the cost of a permit, how long inspection takes, and what documents you need to submit. In most places, the contractor can obtain the permit on your behalf, but you are responsible for making sure it happens.
Plan for living disruption during the renovation
A kitchen renovation means no cooking at home for weeks or months. A bathroom renovation means sharing one bathroom with your family. A roof replacement means noise, dust, and workers on your property from dawn to dusk. A foundation repair might require you to leave the home entirely.
Before work starts, decide where you will cook, shower, or sleep if those spaces are unavailable. If you have young children, pets, or health conditions that make disruption difficult, discuss this with the contractor. Some contractors can phase the work to minimize disruption — for example, finishing one bathroom before starting another, or working on the roof in sections so you can still access the attic.
Ask the contractor about their work schedule. Do they work weekdays only or weekends too? What time do they start and stop? Will they be on-site every day or only certain days? Understanding the rhythm of the work helps you plan your own schedule and set expectations with neighbors.
Create a timeline and communication plan with your contractor
The written contract should include a start date and an estimated end date, but also ask the contractor for a detailed timeline showing major milestones. For a kitchen renovation, this might be: demolition (week 1), framing and electrical (weeks 2–3), plumbing (week 3), drywall (week 4), flooring (week 5), cabinets and countertops (weeks 6–7), final inspection (week 8). A detailed timeline helps you understand what to expect each week and spot delays early.
Agree on how you will communicate. Will the contractor call or text you daily, weekly, or only when there is a problem? Who do you contact if something goes wrong — the contractor, the project manager, or the company office? Establish this before work begins so there is no confusion when issues arise.
Plan for a final walkthrough before you pay the last invoice. You and the contractor should go through the completed work together, check that everything matches the contract, and document any punch-list items — small fixes or touch-ups that still need to be done. Do not pay in full until these are complete.
Prepare your home and documents before work begins
Clear the renovation area of personal items, furniture, and anything you want to protect. Contractors will move things, but they are not responsible for damage to your belongings. If you have valuable artwork, collectibles, or sentimental items in the work zone, remove them.
Take photos of the existing space before work starts. This creates a record of the condition and can be useful if a dispute arises later about what was damaged or what the original condition was.
Gather and organize all documents related to the renovation: estimates, the signed contract, permit paperwork, proof of insurance, and any warranties on materials or workmanship. Keep these in one folder, physical or digital. If a problem arises after the work is done, you will need to reference the contract and warranty terms.
Frequently Asked Questions
How much should I expect a major renovation to cost?
Costs vary widely by region, the scope of work, and material choices. A kitchen renovation ranges from $50,000 to $150,000 or more depending on size and finishes. A bathroom might be $15,000 to $50,000. A roof replacement depends on square footage and materials. Get three local estimates; they will show you the realistic range in your area.
What if the contractor finds a major problem during the work?
This is why you set aside a 15 to 20 percent contingency fund. If the problem is within the scope of the original contract, the contractor should absorb the cost. If it is outside the scope — for example, discovering asbestos or a structural issue — the contractor should notify you in writing, explain the cost, and get your approval before proceeding. Do not let work continue on an unapproved change.
Can I do some of the work myself to save money?
You can do non-structural, non-electrical, non-plumbing work yourself — painting, demolition, or straightforward carpentry. However, electrical, plumbing, and structural work usually require a licensed professional and a permit. Doing this work yourself or hiring an unlicensed person can create safety hazards and void your insurance. Ask your contractor which tasks you can handle and which require a license.
What happens if the contractor goes over budget or misses the important date?
This is why the written contract matters. It should specify what happens if the end date is missed — for example, a daily penalty or the right to hire another contractor to finish at the original contractor's expense. For budget overruns, the contract should require written approval from you before any work outside the original scope begins. If the contractor violates the contract, you can withhold final payment and pursue a claim in small claims court or through your state's licensing board.
Do I need to disclose a renovation to my homeowners insurance?
Yes. Tell your insurance company before work begins. Some renovations increase your home's value and may require a higher coverage limit. Some work — like adding a second story or changing the home's use — may affect your premium or coverage. Your insurer may also require proof that work was permitted and inspected before they will cover damage related to that work.