Mountain House Plans Rooted in 40 Years of Design

From compact ADUs that generate rental income to luxury mountain lodges — professionally designed plans for the home you've been picturing.

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Why Rocky Mountain Plan Company

40 Years of Mountain Design Heritage

Our plans are rooted in four decades of custom residential design along Colorado's Front Range — more than 4,000 homes across some of the most demanding and rewarding building terrain in the country. That experience shows in every plan.

Hillside & Walkout Specialists

We've been designing for sloped lots and hillside sites for decades. Our walkout basement plans transform challenging terrain into dramatic multi-level living — finished lower levels, maximized views, and outdoor spaces on every floor.

Proven ADU Plans That Work

Our 575 sf Modern Farmhouse Carriage House is one of our bestsellers for a reason — it's attractive, efficient, and genuinely buildable. Our ADU collection is designed to generate rental income, add property value, and serve your household for decades.

Find Your Collection

Exterior view of a charming Accessory Dwelling Unit, perfect as a backyard cottage, in-law suite, or rental unit, showcasing efficient and modern design.

ADU & Guest House Plans

Rental income, multigenerational living, and backyard cottages — designed to earn their place on your lot.

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Sloped-lot mountain home with walkout basement and rear deck

Hillside & Walkout Basement House Plans

Multi-level homes that turn a sloped lot into your greatest design asset.

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Mountain home with timber trusses, stone accents, and rear deck overlooking scenic mountain terrain — ideal for sloped lots and rustic builds.

Mountain House Plans

Vacation cabins, ski lodges, and full-time mountain homes — in styles built for the landscape.

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Single-level home with wide front porch and no-step entry — ideal for aging in place or low-maintenance retirement living.

Single-Level Plans

Open layouts, main floor living, and outdoor spaces that actually get used — in styles from mountain farmhouse to contemporary lodge.

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Our Most Popular Plans

GOAT HILL
Modern Farmhouse carriage house with a cross gable roof, two-car garage, and rear-access one-car garage door for workshop or storage.

GOAT HILL

Style: Modern Farmhouse
Size: 575 sf + 2-car garage
Bedrooms: Studio

The modern farmhouse carriage house that started it all — studio living above a two-car garage, built for rental income and multigenerational living.

ARCTIC LUPINE
Exterior view of Arctic Lupine, a modern lodge-style home with timber trusses, vaulted ceilings, and a mountain-modern design.

ARCTIC LUPINE

Style: Mountain Modern
Size: 3,140 sf across 3 levels
Bedrooms: 4 bed · 3.5 bath

Three walkout levels on a hillside lot — a private upper balcony, a covered deck with a fireplace, and outdoor living at every floor.

BLUE RIVER
Luxe modern home exterior with angled roofline and covered patio

BLUE RIVER

Style: Modern
Size: 2,300 sf main · optional 1,625 sf lower
Bedrooms: 3–4 bed · 2.5–3.5 bath

A modern family home with a 3-car garage, open main level, and an optional walkout lower level that adds a full rec room suite — built to grow with you.

ABRAHAM LAKE
ABRAHAM LAKE

ABRAHAM LAKE

Style: Modern Farmhouse
Size: Up to 3,119 sf across 3 levels
Bedrooms: Up to 4 bed · multiple bath options

A modern farmhouse with a main level primary wing, upper-level bonus room, and an optional walkout lower level that adds two bedrooms, a rec room, and a covered patio.
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Who We Serve

Built for Dreamers, Builders, and Everyone Between

Our customers all want one thing: a home designed with care. Here's where you fit.

The ADU Investor

You Want Your Property to Work Harder

You're looking to add rental income, create space for a parent or adult child, or increase your property's long-term value. Properties with ADUs are valued an average of $349,000 higher — and the right plan makes all the difference between a space that earns and one that just sits there.

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The Mountain Home Buyer

You've Found the Lot. Now Find the Plan.

Whether you're building on a hillside with dramatic views, a mountain acreage, or a vacation lot you've been eyeing for years — you need a plan that works with the land, not against it. Our catalog is built for exactly this: homes that capture what a mountain site has to offer.

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The Main Floor Living Buyer

You Want a Home That Works on One Beautiful Floor

Whether you're drawn to single-level living for the flow, the long-term practicality, or simply because a flat lot calls for a different kind of design — our single-level collection was built for you. Open plans, private primary suites, and outdoor living spaces that feel intentional rather than incidental.

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The Builder or Contractor

You Need Plans Your Clients Will Love

You Need Plans Your Clients Will Love On-trend designs, clean documentation, and a catalog deep enough to find the right fit for any client or project. Our Elevated Builder Advantage Program is built for contractors who want ongoing access to our catalog and plans that sell.

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A Few Numbers Worth Knowing

40+

Years of custom design heritage behind every plan

4,000+

Custom homes designed by our principal designer

150+

Professionally designed plans in our catalog

1-2 Days

Standard delivery after your license is signed

We also sell through the industry's most trusted platforms — but you'll always find our full catalog, best pricing, and direct support right here.

Plans from our catalog are also available on:

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Get Our Free Guide: What It Actually Costs to Build a Mountain Home

Building a mountain home involves a lot more than the cost of the plan. Local engineering. Site prep. Modifications. Mountain-specific factors that flat-lot builds never deal with. Our free guide and budget worksheet walk you through the full picture — so you can plan with confidence instead of guessing.

What's inside:

  • Why the plan price is a small fraction of your total project cost — and what else to budget for
  • The site-specific costs most buyers don't see coming (geotech reports, snow load engineering, remote-site logistics)
  • How to budget for modifications — and when they're worth it
  • A simple worksheet to estimate your own project costs before you break ground
  • Mountain-specific contingency planning — because builds in the Rockies don't always run on schedule

What Makes Rocky Mountain Plan Company Different

There are a lot of places to buy house plans online. Here's why our customers choose us – and why they keep coming back.

In-House Design, Not a Plan Broker

Every plan in our catalog was professionally designed — not licensed from a third-party database or assembled from generic templates. Our designs reflect real architectural knowledge: how rooms connect, how light moves through a home, how to make a hillside lot work instead of fight it. The craft shows, and it shows in the finished home.

Mountain Expertise That's Actually Earned

Our principal designer has spent 40+ years and 4,000+ homes earning a reputation for getting mountain design right. That means understanding how snow loads affect structure, how a site's orientation affects where windows should go, and how to design for the outdoor living that makes a mountain home worth building. We didn't add "mountain" to our name as a marketing choice. It's where we started.

A Semi-Custom Approach, Without the Custom Price

Stock plans are a starting point — and we know it. Our plans are designed to be modified, and we'll help connect you with trusted professionals to make any changes your site or vision requires. Prefer to start close to the design you want rather than commission something from scratch? That's exactly what our catalog is for.

Personal Service, Every Time

When you reach out to Rocky Mountain Plan Company, you hear from us — not a ticketing system. We'll help you figure out whether a plan fits your lot, walk you through your options before you buy, and connect you with engineers and drafters when you need them. We're small enough to actually care about your specific project, and we wouldn't have it any other way.

Ready to Find Your Perfect Plan?

Browse our full catalog of mountain homes, hillside designs, ADUs, and more. Or reach out — we'd rather answer your questions up front than have you figure it out alone.
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