Most Idaho Falls and Ammon transactions are conventional — Bonneville County’s 2026 conforming limit of $832,750 covers the vast majority of purchases at the area’s median price of $350,000–$430,000. Idaho Falls is not Eagle, where the median itself triggers Jumbo, or Coeur d’Alene, where lakefront estates routinely reach $2 million. Being direct about that is part of serving this market accurately.
Where Jumbo financing does apply in Idaho Falls is specific and meaningful. The Comore Loma subdivision in the Ammon foothills — lots from 1.5 to 7 acres with unobstructed views of the Snake River Valley and the Grand Teton peaks to the northeast — is Idaho Falls’ premier upper-tier residential community, with custom homes reaching $1 million and estate-scale builds on larger lots pushing beyond. Riverfront parcels along the Snake River Greenbelt corridor with premium positions and significant improvements cross the conforming threshold on some purchase structures. And custom builds on Bonneville County acreage — where land cost plus full-upgrade construction creates project values above $832,750 — place buyers squarely in Jumbo territory.
There is also a specific INL income angle. Idaho National Laboratory’s research scientists and principal engineers earn between $164,000 and $268,000 annually. A dual-income INL household — two research scientists, both on 9×80 schedules, both at the 75th percentile of compensation — has a combined gross income above $350,000. On Idaho Falls’ cost of living (approximately 17% below the national average), that income supports a purchase price well above the conforming limit for buyers who choose to maximize. Understanding how to document federal DOE contractor compensation, structure the pre-approval, and identify the right Jumbo product for this buyer is where lender expertise creates real value.
A Jumbo mortgage is any loan exceeding Bonneville County’s 2026 conforming limit of $832,750. In Idaho Falls, this threshold is reached at the upper end of the market: Comore Loma estate custom builds in the Ammon foothills, riverfront Snake River parcels with significant improvements, upper-tier custom builds on Bonneville County acreage, and purchases by high-income INL or EIRMC households who choose to finance above the conforming limit.
Key Features:
Loan amounts from $832,751 through $2 million (Super-Jumbo above $2 million)
Down payment options starting at 10–20% depending on loan size and borrower profile
No PMI on most Jumbo structures at 20%+ down
Federal W-2 income from INL/Battelle Energy Alliance correctly documented
Asset-depletion qualifying for buyers with TSP balances, investment portfolios, or home sale proceeds
Physician Jumbo available for EIRMC attending physicians purchasing in Comore Loma or other upper-tier Ammon properties
The primary program for Idaho Falls buyers financing Comore Loma estate homes, upper-tier riverfront properties, and custom builds in Bonneville County where the loan amount exceeds $832,750. Documentation-flexible for federal contractor W-2 income, dual-income INL households, EIRMC attending physicians, and California or Pacific Northwest relocators with complex income histories.
For estate-scale Comore Loma builds on the largest lots, rare Snake River parcels with exceptional improvements, or custom builds where total project value exceeds $2 million.
EIRMC attending physicians who graduated from the Internal Medicine, Family Medicine, or Psychiatry residency programs and choose Comore Loma or other upper-tier Ammon properties can access Physician Jumbo programs combining physician-specific terms with loan amounts above $832,750.
Comore Loma — The Ammon Foothills Estate Community
Comore Loma is the premier residential address in the Idaho Falls metro area — a subdivision in the Ammon foothills with lots ranging from 1.5 to 7 acres, positioned to capture panoramic views of the Snake River Valley and the Teton Range. The community's custom homes — designed by individual buyers and built to estate specifications on large, private parcels — represent the top of the eastern Idaho residential market. Homes in Comore Loma range to $1 million and above for the largest, most complete custom builds. The combination of lot size, Teton views, privacy, and proximity to the INL bus route and EIRMC makes this the primary destination for Idaho Falls' highest-income professional buyers. Every purchase above $832,750 in Comore Loma requires Jumbo financing.
Snake River Greenbelt Riverfront Properties
The Snake River Greenbelt runs through the heart of Idaho Falls, connecting downtown amenities to natural riverfront access. Parcels positioned directly along the Greenbelt with premium lot positions, river views, and significant custom improvements trade at a premium within the Idaho Falls market. Upper-tier riverfront properties with larger footprints and full custom finishes can approach or exceed $832,750, placing financed purchases with typical down payment structures in Jumbo territory.
Upper-Tier Custom Builds in Bonneville County
Bonneville County outside Idaho Falls city limits — including Ammon, Iona, and rural acreage sites northeast of the city with views of the Teton Range — offers custom building sites where the combination of quality land position and full-upgrade construction produces finished values above $832,750. Buyers who want a newer-build feel, Teton views, and larger lot sizes than are available in established Idaho Falls neighborhoods increasingly target these parcels for custom construction.
INL/Battelle Energy Alliance federal W-2 income documented correctly — no generalist lender confusion about DOE contractor employer verification
Dual-income INL household qualifying structured properly for combined federal salaries
EIRMC attending physician Jumbo programs for Comore Loma and upper-tier Ammon purchases
Asset-depletion qualifying for INL employees with significant TSP and liquid retirement balances
California and Pacific Northwest relocation income documented for Idaho Falls upper-tier purchases
Comore Loma lot purchases and custom build financing in the Ammon foothills
Licensed in Idaho and multiple states
Ryan Lehrman, NMLS #235295
Credit Profile: Minimum 700–720 for most programs; best rate tiers available at 740+.
Income Documentation: Federal W-2 (Battelle Energy Alliance/INL), EIRMC/HCA Healthcare physician contracts, self-employment, asset depletion, and dual-income federal employee households all eligible.
Down Payment and Reserves: Typically 10–20% down depending on loan amount. Most programs require 6–12 months PITI in verified post-closing liquid reserves.
Property Type: Primary residences and select second homes. Large-acreage Comore Loma lots eligible with proper appraisal documentation given limited comparable sales.
Confidential Consultation — We identify whether your Comore Loma purchase, riverfront property, or upper-tier Bonneville County project requires Jumbo financing, and match you to the right program before offers are submitted.
Pre-Approval — A verified Jumbo pre-approval is prepared with INL or EIRMC income documentation confirmed upfront. For Comore Loma purchases, this is the document that moves quickly in a market where estate lots occasionally attract multiple buyers.
Property Under Contract — Once you have an accepted offer, formal Jumbo underwriting begins. Comore Loma appraisals may require additional time given limited comparable estate-scale sales in Bonneville County.
Underwriting and Conditions — We manage all lender communication and conditions. Federal contractor income and physician program documentation are structured correctly from the first submission.
Clear to Close and Closing — Most Idaho Falls Jumbo purchases close in 21–30 days with proper pre-approval in place.
Less common than in Ada County markets. Bonneville County's $832,750 limit covers the vast majority of Idaho Falls and Ammon transactions at the area's $350,000–$430,000 average prices. Jumbo applies specifically to Comore Loma estate builds, upper-tier riverfront properties, and high-income INL or EIRMC households purchasing at the top of the local market.
Yes. INL employees receive W-2 income from Battelle Energy Alliance as the DOE management contractor — standard employment income that qualifies for Jumbo underwriting without the equity complexity of private tech employers. Research scientists at INL earn between $164,000 and $268,000 annually in total compensation. The documentation requirements are W-2 forms from Battelle Energy Alliance, pay stubs, and standard employer verification through INL's established process.
Yes, in most cases. Federal Thrift Savings Plan (TSP) balances are eligible for Jumbo reserve documentation as retirement assets, typically valued at 60–70% of the vested balance when applying to reserve requirements (the discount accounts for early withdrawal penalties). INL scientists who have contributed to TSP over a long DOE career often have substantial balances that can satisfy the 6–12 month PITI reserve requirements for standard Jumbo programs.
Ready to finance your upper-tier Idaho Falls property? Schedule a confidential consultation today.
Originally from Harrisburg, Pennsylvania, I moved to Phoenix to attend Arizona State University and have proudly called Phoenix home ever since.
My journey into the mortgage industry began with a friend’s encouragement, who saw how my energy and people-first mindset could make a difference. He was right — I found my calling.
I’ve always embraced what makes me different. With ADHD as my secret weapon, I thrive in fast-paced, detail-heavy environments. I’ve built my career on clear communication, creative problem-solving, and putting clients first, always.
Outside of work, my greatest motivation is my wife and three amazing kids. I’d be honored to help guide you through your lending journey with care, clarity, and commitment.
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