While some aspects of an appraisal, such as comparable properties nearby, are out of your control, there are several steps you can take to potentially increase your home's value. Make any necessary repairs and upgrades before the appraiser's visit, as they can only value what is currently part of the home, not its potential. Examples include renovating older areas, updating landscaping to boost curb appeal, and staging your home. You can also provide the appraiser with the cost of recent upgrades, which may increase your home's value by about 50% or more of what you paid for those improvements.

While there’s technically no limit to the dollar amount you can borrow for a home addition, the standard limit is around 80% of the value the addition is expected to add to your home. That means you could feasibly borrow up to $80,000 if an appraiser determines that the addition or bump out will add $100,000 in value to your property. You might also be limited by your debt-to-income ratio or credit score.

The cost to appraise a home depends on the type. Common types include:

• Single-family homes: $300–$400

• FHA or VA single-family homes: $400–$500

• Condominium: $300–$500

• Multi-family home: $500–$1,000

• Apartment building: $1,500–$3,000

• Commercial properties: $1,400–$10,000

• Raw land: $1,000–$8,000

The purpose of the home appraisal determines which party pays for it. You’re generally responsible for the cost if you need to know the current value of your home to refinance your mortgage, though in some instances the lender will pay for it. The buyer pays for the appraisal when they are applying for their mortgage.