Renovation Financing: How to Pay for a Remodel Without Refinancing Your Mortgage

A HELOC, home equity loan, or other financing can help pay for a kitchen, bathroom, pool, accessory dwelling unit (ADU), or other remodel without replacing your existing first mortgage. The right choice depends on how the project will be priced and billed, how long it will take, and how you plan to repay what you borrow.

HELOCs and home equity loans are secured by your home, so falling behind on payments could put your home at risk. Before you borrow, get firm bids, build in a contingency for surprises, and compare rates, fees, and repayment terms. You can also explore other ways to use home equity.

Common Projects: ADUs, Pools, Kitchens, Bathrooms, and Fixer-Uppers

Home equity can fund many kinds of projects. What matters is matching the financing to how the project is priced and paid.

  • ADUs: Rules for accessory dwelling units, including size, rental use, and permits, are set by state and local governments and vary widely. Check with your local planning or building department before you budget or borrow.
  • Pools and landscaping: A new pool is often priced as a fixed contract with a set payment schedule, so a fixed-rate home equity loan can match the cost, while a HELOC may suit smaller or phased work such as resurfacing. Get the full cost, including decking, equipment, and any required safety barriers, before you borrow.
  • Kitchens: Kitchen remodels are often billed in stages, so a HELOC can let you draw as work is completed. Resale value depends on your market and the scope of the work, so don’t assume a remodel will pay for itself.
  • Bathrooms: Because bathroom work is often billed in stages, using a HELOC for a bathroom remodel (Arizona guide) can let you draw as the contractor invoices rather than borrowing the full amount up front.
  • Fixer-uppers: If you’re buying a home that needs major work, ask lenders about renovation loan options designed for purchases or refinances, since a HELOC or home equity loan generally depends on equity already available.

HELOC, Home Equity Loan, or HEI: Matching Financing to Your Project

For most renovations, there are three primary tools worth understanding:

  1. The HELOC (best for staged projects): You can draw as needed up to your credit limit, so you can pay contractors as milestones are reached. Most HELOCs have variable rates, some plans allow interest-only payments during the draw period, and some end with a balloon payment, so check how payments will change over time.
  2. The home equity loan (best for one-time costs): If you have a fixed-price contract, a home equity loan generally provides the full amount at the start, with equal payments that pay off the loan.
  3. The home equity investment: Some HEI agreements don’t require monthly payments but create a future settlement obligation. Settlement formulas vary by provider, and a renovation can affect what you owe, so understand how an HEI treats the value your remodel adds before using one for a renovation.

Match financing to your timeline: Line up financing before work begins, since approval and closing take time and contractors often require deposits. Build in a contingency for cost overruns, and make sure the payments will fit your budget for the full repayment period. If you use a HELOC, remember that a lender can freeze or reduce the line in certain circumstances.

Learn More About Renovation

Some of these articles focus on Arizona homeowners.

FAQ: Renovation Financing

Is it better to use a HELOC or a home equity loan for a large pool build?

A fixed-rate home equity loan can fit a pool project priced as a fixed contract with a set payment schedule, because you generally receive the full amount at the start and repay it in equal payments. A HELOC may fit if costs will be paid in stages or are less certain. Either way, the loan is secured by your home.

How long does it take to get a HELOC or home equity loan approved?

It varies by lender and can depend on appraisal, title, and documentation requirements. Apply well before your contractor needs a deposit.

Is an ADU a better investment than a pool?

It depends on your goals and market. An ADU can add living space or, where local rules allow, rental income, while a pool may matter more to buyers in some neighborhoods. Resale impact varies by market and project, so consider your goals and speak with a local real estate professional before choosing a project primarily for investment reasons.

Can I use these funds for soft costs like architects and permits?

It depends on the loan and lender. Some financing can be used for design, permits, and other pre-construction costs; check the loan’s terms and keep records of how funds are used.

For Arizona Homeowners: ADUs, Property Taxes, and Resources

This section applies only to homes in Arizona.

ADU law. Under A.R.S. § 9-461.18 (enacted through HB 2720 in 2024 and amended in 2025), Arizona cities and towns with more than 75,000 residents must allow at least one attached and one detached accessory dwelling unit on lots where a single-family home is allowed. An ADU can be up to 75% of the main home’s floor area or 1,000 square feet, whichever is less. Cities can’t require a relationship between the owner and the ADU’s occupant, and can’t prohibit renting the main home or the ADU separately as long-term rental housing (leases of 90 days or longer, or month-to-month). For short-term or vacation rentals, a separate law (A.R.S. § 9-500.39) allows a city or town to require the owner to live on the property if it contains an ADU that received a certificate of occupancy, certificate of completion, or similar final approval on or after September 14, 2024. Whether a structure is treated as a guest house or an ADU, and what permits and utility connections it needs, depends on your city or town. Check current local rules before you design or borrow.

Property taxes. Adding a casita or other structure increases your home’s full cash value. Arizona generally limits annual growth in limited property value, the value used for most property taxes, to 5% (A.R.S. § 42-13301; see Proposition 117). But under A.R.S. § 42-13302, if new construction is equal to or greater than 15% of the property’s full cash value, the limited value is reset to a level comparable to similar properties. Before borrowing for construction, ask your county assessor how the project may affect your property’s valuation and taxes.

Site preparation. Caliche, a cemented layer of calcium carbonate found in some desert soils, can make excavation harder and more expensive in parts of the East Valley and North Scottsdale. Build a contingency into your project budget and financing plan for site-preparation surprises.

Arizona resources: Scottsdale renovation financing · Arizona casita financing · Arizona pool financing · Pool remodel or resurfacing in Phoenix · Arizona HELOC guide · Best HELOC lenders in Arizona · Current Arizona home equity rates

EquitySquirrel, operated by Scout Media LLC, is an educational resource, not a lender. This content does not constitute financial, legal, or lending advice. Consult a licensed professional before making decisions about your home equity. Aleksandra Kadzielawski, Arizona real estate license #SA694336000.