The typical home value in Gaithersburg is $494,924 (Zillow, up 1.3% from last year). Within Montgomery County, Rockville is at $607,784, Bowie is $527,321, and Frederick is $435,707 (Zillow, based on 2026 data). Gaithersburg sits somewhere in the middle of these values.

This number is clear. A 20% down payment means you need $98,985, and with an FHA loan at 3.5%, you'll need $17,322. Filling the rest with a loan, the monthly principal and interest at an average fixed rate of about 6.6% (ranging from 6.55% to 6.72%, Freddie Mac PMMS, as of July 2026) would be around $2,530.

There are two main types of loans. For FHA, if your credit score is above 580, you pay 3.5%, and if it's between 500-579, you pay 10% (fha.com). Conventional loans start at 3% for first-time homebuyers or those with an area median income of 80% or less, with a typical rate of 5%. If you put down less than 20%, PMI applies, but it disappears once you reach 20% (nerdwallet.com).

The difference in interest rates based on credit score is also significant. Above 780, the rate is 6.59%, in the 760s it's 6.66%, in the 740s it's 6.75%, and in the 700s it's 6.91% (themortgagereports.com, early July 2026). This difference can add up to tens of thousands of dollars over 30 years.

The average effective property tax rate in Maryland is about 1.0% (propertytaxrates.org, Montgomery County rates need to be checked separately). For a home valued at $494,924, the annual property tax would be $4,949, or about $412 per month. This is lower than Rockville but slightly higher than Frederick.

If you need down payment assistance, consider Maryland's mortgage programs like 1st Time Advantage or Flex 5000, which can provide up to $10,000 or 3-6% of the loan amount (marylanddownpaymentassistance.org). Income limits and completion of an educational course are required.

The documents for pre-approval are straightforward. You'll need proof of income for the last two years, tax returns, recent bank statements, and a list of debts. Having these documents ready can save time during the offer stage, and since each lender may have slightly different requirements, it's wise to get a checklist in advance.

Closing costs should be calculated as 2-5% of the loan amount. For a $390,000 loan, this would be between $7,800 and $19,500. This includes appraisal fees, title insurance, and loan origination fees, which are adjusted slightly each year, so be sure to check the final statement provided by the lender just before closing.

Gaithersburg is a neighborhood with good school districts, such as Kentlands, and has a steady influx of Korean families. Check school ratings on GreatSchools or Niche, but be aware that boundaries change frequently, so verify the assigned school before purchasing. Many families adjust their budgets compared to nearby Rockville or Bowie, and it seems reasonable to compare commuting distances, school districts, and property taxes together. The fact that Gaithersburg requires a lower budget than Rockville while not significantly lacking in school quality and living infrastructure is a reason more families are choosing to move there.

Between a 30-year fixed and an ARM, if you plan to stay long-term, the fixed option is more stable. An ARM has a low fixed rate for the first few years, then adjusts based on market conditions, making it a viable option for families who may relocate within five years to reduce initial repayment burdens. After the contract, an escrow is opened, followed by a home inspection and appraisal. Any repair items identified during the inspection can serve as a basis for renegotiation with the seller before closing, so it's essential not to skip this step, even in a competitive market.

This article is not investment or legal advice, and it is recommended to consult with a loan officer and a real estate professional before finalizing any contracts.