Buying an Experimental Aircraft: A First-Time Buyer's Guide to Homebuilts
What "experimental amateur-built" really means, whether to buy or build, and the mistakes first-time homebuilt buyers make most often.
This guide is for pilots considering their first experimental amateur-built (E-AB) aircraft, whether it's a flying Van's RV, a Kitfox or a kit they'd build themselves. Read it before you look at listings. The rules that come with the category affect maintenance, insurance, resale and financing.
What does "experimental amateur-built" mean?
"Experimental" is a type of special airworthiness certificate. The amateur-built purpose is one of several experimental purposes. To qualify, the major portion of the aircraft must have been fabricated and assembled by people who built it for their own education or recreation. The FAA evaluates many commercial kits for this, which is where the "51% rule" shorthand comes from. What that means for an owner:
- Operating limitations. Each E-AB is issued its own operating limitations with the airworthiness certificate. They are part of the aircraft's paperwork and set where and how it may fly. Read them before you buy.
- Phase I and Phase II. A newly certificated E-AB first flies a test period in an assigned area, typically 25 hours with a type-certificated engine and propeller combination or 40 hours otherwise, as its limitations specify. Passengers who aren't essential to the flight aren't allowed. Once the pilot records Phase I complete in the logbook, the aircraft moves to Phase II.
- No compensation or hire. Under 14 CFR 91.319 you can't carry persons or property for compensation or hire in an experimental aircraft, so there's no rental or charter income to offset costs.
- Passengers must be told. You must advise each person carried of the experimental nature of the aircraft, and the aircraft carries an "EXPERIMENTAL" marking near the cabin entrance.
- Condition inspection. Instead of an annual inspection, an E-AB needs a condition inspection every 12 calendar months, signed off by an A&P mechanic or by the builder holding the repairman certificate for that aircraft.
- Repairman certificate. Under 14 CFR 65.104, this certificate goes only to the primary builder of that specific aircraft. It doesn't come with the sale.
Experimental vs certified at a glance
| Topic | Experimental amateur-built | Certified (standard category) |
|---|---|---|
| Design approval | Operating limitations for that one aircraft | FAA type certificate for the model |
| Yearly inspection | Condition inspection by an A&P or the builder-repairman | Annual inspection by an A&P with Inspection Authorization |
| Modifications | Owner may modify; major changes can require FSDO notification and more flight testing | Need approved data such as an STC or field approval |
| Commercial use | Not for compensation or hire | Rental, instruction and charter possible under the right rules |
| Financing | Fewer lenders; starting rates around 7.78% (Sept 2026) | Broad lender market; starting rates around 7.01% (Sept 2026) |
| Value drivers | Design, builder skill, engine, panel, records | Model, year, times, equipment, damage history |
Who can fly one?
A private pilot certificate or higher covers any E-AB airplane within your ratings and endorsements (tailwheel, complex, high-performance as applicable). Since October 22, 2025, the MOSAIC rule also lets sport pilots fly any airplane with a clean stall speed (VS1) of 59 knots CAS or less at maximum takeoff weight, regardless of weight or category. That includes many amateur-built designs, with up to four seats but only one passenger. The old 1,320 lb weight cap no longer applies to what a sport pilot may fly. Check the specific aircraft's documented stall speed before you rely on it. The light-sport buyer's guide covers factory-built options.
Buy a flying experimental or build one?
| Factor | Buy a flying aircraft | Build a kit |
|---|---|---|
| Time to flying | Weeks, after inspection and insurance | Commonly several years of spare time |
| Cost | Usually below what it cost the builder | Full parts cost plus tools, plus your labor |
| Repairman certificate | No; hire an A&P for condition inspections | Yes, for the aircraft you built |
| Knowing the airplane | Only as good as the records and the pre-buy | You know every part |
| Financing | Aviation loan possible once it's flying | Kit rarely accepted as collateral; fund with cash, home equity or personal loans |
A simple decision rule: if your goal is to fly, buy. If your goal is to build, and you have the space, the years and the budget to finish, build. Buying someone else's unfinished project is the riskiest path of all. Work quality is hard to judge, records may be incomplete, and it may not qualify as amateur-built if too much was done commercially. For how builders pay for a kit, see how to finance a kit plane build.
Popular designs for first-time buyers
Popular designs are easier to inspect, insure, maintain and resell, and easier to finance, because appraisers have comparable sales to work from.
- Van's RV series. All-metal, low-wing and widely built: two-seat side-by-side models (RV-7, RV-9, RV-14), the tandem RV-8, the light-sport-oriented RV-12 and the four-seat RV-10. See the RV-10 buyer's guide and RV-10 cost of ownership.
- Kitfox. High-wing, two-seat, tube-and-fabric, aimed at short and unimproved strips. See the Kitfox buyer's guide and Kitfox cost of ownership.
- Zenith STOL series. All-metal, two-seat, high-wing short-takeoff designs such as the CH 701 and CH 750.
Pre-buy checklist for a homebuilt
- Hire a mechanic who knows the specific design, not just the engine.
- Read the airworthiness certificate and the full operating limitations, and confirm the registration matches.
- Find the logbook entry recording Phase I complete.
- Check the date and signer of the last condition inspection.
- Review the builder's log and photos, especially of areas now closed up.
- Identify the engine: type-certificated, experimental or automotive conversion. It affects insurance and value.
- Look closely at wiring, fuel lines, control-system hardware and firewall-forward workmanship.
- Ask about major changes since certification (engine, propeller, structure) and how they were handled.
- Run an FAA registry and lien search, and get an insurance quote on this N-number before you commit.
Our general pre-buy inspection checklist covers the engine and airframe basics that apply to any airplane.
Looking at a flying homebuilt?
Send the design, engine and asking price. A financing specialist can tell you what lenders in our network will need before you make an offer.
Common first-time buyer pitfalls
- Assuming you can sign off your own inspection. Unless you built it, you can't. Budget for an A&P every year.
- Skipping transition training. Many E-AB designs are lighter and quicker than typical trainers. Insurers often require type-specific training, and a 2012 NTSB safety study flagged accidents in the early hours after a used homebuilt changes hands.
- Paying for the builder's pride. Price the airplane against sold comparables of the same design and engine, not against the seller's receipts.
- Buying a rare design. Parts, expertise, insurance and resale all get harder.
- Ignoring insurance until after the handshake. Some carriers decline certain designs or engines, or set pilot-time minimums you may not meet.
- Planning international trips without checking. Many countries require advance permission for U.S. experimental aircraft. Confirm before you plan a trip abroad.
How financing fits in
A finished, flying E-AB can usually be financed, but by fewer lenders than a certified airplane. As of September 2026, FLYING Finance lists experimental/kit starting rates of 7.78%, versus 7.01% for certified pistons. Down payments are typically larger and records are reviewed closely. For lender criteria, appraisal issues and payment examples, see experimental aircraft financing.
How this guide differs from related guides
This page explains the category and the buying decision for first-timers. For loan requirements on a completed, flying E-AB, see experimental aircraft financing. For paying for a kit while you build it, see how to finance a kit plane build. For factory-built light-sport aircraft under the new rules, see MOSAIC light-sport financing. For buying any first airplane, start with the first-time aircraft buyer guide.
Frequently asked questions
What does "experimental amateur-built" mean?
It is an FAA special airworthiness category for aircraft whose major portion was fabricated and assembled by people building it for education or recreation (14 CFR 21.191(g)), often called the 51% rule. The aircraft flies under its own operating limitations rather than a type certificate, cannot be used for compensation or hire, and needs a condition inspection every 12 months.
Can I work on an experimental aircraft I bought but did not build?
Generally you may perform maintenance and alterations yourself, as the operating limitations allow, but the annual condition inspection must be signed off by an A&P mechanic or by the holder of the repairman certificate for that aircraft. That certificate is issued only to the primary builder (14 CFR 65.104) and does not transfer to a buyer, so budget for an A&P every year.
Can a sport pilot fly an experimental aircraft?
Yes, if the airplane qualifies. Since October 22, 2025, under the MOSAIC rule, sport pilots may fly airplanes with a clean stall speed (VS1) of 59 knots CAS or less at maximum takeoff weight, with up to four seats but only one passenger, regardless of weight or certification category. That includes experimental amateur-built aircraft that meet the stall-speed limit.
Is it cheaper to buy a flying experimental or build one?
Buying a finished, flying aircraft usually costs less and gets you in the air years sooner, because sellers rarely recover their labor and often not all of their parts cost. Building costs more in money and time but gives you the repairman certificate for your aircraft, full knowledge of how it was built, and the equipment you choose.
Can I finance an experimental aircraft?
A completed, flying experimental can be financed by a narrower group of lenders. As of September 2026, FLYING Finance lists experimental/kit starting rates of 7.78% versus 7.01% for certified pistons. Expect a larger down payment, a deeper records review and an insurance quote up front. A kit still under construction is rarely accepted as collateral, so builders usually fund the build another way.
What should a pre-buy inspection on a homebuilt include?
Use a mechanic who knows the specific design. Beyond engine checks, they should review the builder's log and photos, the airworthiness certificate and operating limitations, the Phase I completion entry, weight and balance, wiring and fuel-system workmanship, control-system hardware and any repairs. Look for major changes made after certification and confirm they were handled as the operating limitations require.
Last reviewed September 27, 2026. Rates and rules change; see our editorial standards.