Modern Mountain Carriage House ADU with Vaulted Ceilings
IMAGES MAY SHOW MODIFICATIONS MADE TO ORIGINAL PLANS. COPYRIGHT OWNED BY THE DESIGNER.
House Plan Features:
| Square Footage | |
|---|---|
| Main Level | 232 sf |
| Upper Level | 774 sf |
| Total Finished | 1006 sf |
| Garage Level | 541 sf |
| Garage | 541 sf |
| Outdoor Living | |
| Covered Deck | 105 sf |
| Deck | 160 sf |
| Other Specifications | |
|---|---|
| Bedrooms | 2 |
| Full Bathrooms | 2 |
| Garage Bays | 2 |
| Garage Entry | Front |
| Width of House | 40 ft |
| Depth of House | 30 ft |
| Building Height | 28 ft |
| Foundation Type | Slab |
| Exterior Wall Construction | 2x6 |
| Ceiling Height — Main Level | 10' |
| Ceiling Height — Upper Level | 8', Vaulted |
| Roof Pitches | 5/12 |
Willowherb is a modern mountain carriage house ADU, blending rustic lodge aesthetics with contemporary design. This versatile home is perfect for those seeking extra space, a rental unit, or a small vacation home, offering 774 square feet of vaulted living space above an oversized two-car garage.
With timber trusses, stonework, and natural materials, Willowherb embraces the warmth and character of a mountain retreat, making it ideal for upscale communities, rural escapes, or luxurious backyard additions.
Designed for flexibility and function, this plan includes a spacious garage level with workshop space and a full bath, and an upper-level open-concept living area with a wraparound deck, perfect for entertaining and relaxation.
Key Features of the Willowherb Plan
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Modern Mountain Cabin Design: Lodge-inspired exterior with timber trusses, stone accents, and natural materials, perfect for upscale or mountain settings.
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Oversized Two-Car Garage: Spacious garage with a workbench area, mechanical room, and full bathroom, ideal for workshops, projects, and outdoor gear storage.
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Flexible Access Options: Exterior stairs lead to the upper-level entry, while a spiral staircase inside provides convenient interior access.
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Vaulted Living Spaces: The open-concept kitchen and living room feature soaring 12'-8" ceilings, creating an airy, spacious feel.
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Expansive Wraparound Deck: A partially covered 265-square-foot deck extends the living space outdoors, wrapping from the front to the right side for stunning views and relaxation.
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Comfortable Primary Suite: Vaulted ceilings, a closet, and ensuite bath access make this bedroom a serene retreat.
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Versatile Second Bedroom: Perfect for guests, family, or a home office, offering flexibility for short-term rentals or full-time living.
Ideal for Rental Income, Guests, or a Private Retreat
The Willowherb plan is a smart investment for homeowners, builders, and vacation property owners looking for a stylish and functional ADU. Whether used as a rental unit, guest house, or mountain getaway, this compact yet highly efficient layout provides both comfort and practicality.
The garage level’s oversized layout, workshop space, and full bath add exceptional functionality, while the upper-level living space and wraparound deck create a welcoming retreat for residents and guests alike.
With its mountain lodge appeal, modern finishes, and thoughtful design, Willowherb is an elegant and adaptable addition to any property.
Why Choose the Willowherb Plan?
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Versatile ADU: Ideal for rental income, guest accommodations, or a private retreat.
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Mountain Lodge Charm: Timber trusses, stone accents, and natural materials create a rustic yet refined aesthetic.
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Oversized Garage & Workshop: A spacious two-car garage with workbench space, a mechanical room, and a full bath for added functionality.
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Vaulted Ceilings: 12'-8" ceilings in the living area and primary bedroom enhance the sense of space and openness.
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Expansive Deck: 265-square-foot wraparound deck, partially covered for indoor-outdoor living.
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Flexible Second Bedroom: Use as a guest room, home office, or rental suite.
Find Your Perfect Carriage House or Vacation Home
If you’re looking for a modern mountain ADU with lodge-style charm, Willowherb is the perfect fit. Explore more carriage house and ADU plans to find the ideal design for your property today!
Questions About Willowherb:
What's included in my plan purchase?
Every Rocky Mountain Plan Company plan includes a complete digital plan set: floor plans, exterior elevations, cross-sections, roof ridge plan, foundation layout, electrical plan, and more. You'll choose between PDF or CAD file formats at checkout, and every plan includes a single-use build license unless you add an unlimited building license. See exactly what's in every plan set →
Are these plans stamped by an engineer?
Our plans don't come pre-stamped, and that's standard across the pre-drawn plan industry, not a gap in the design. Most jurisdictions require a licensed local engineer to review the plans for your specific site conditions (snow load, wind zone, seismic zone, soil) and apply their stamp before issuing a building permit. Mountain and hillside lots especially tend to trigger this. If you'd like a referral to a trusted engineering firm, just ask. How engineering and permitting work →
What's not included in my plan set?
Your plan set is the complete architectural design. A few things are handled locally rather than by us, by design: structural engineering and calculations, your site or plot plan, mechanical, plumbing, and HVAC drawings, and energy calculations. These depend on your lot, your climate, and your local code, so your builder, engineer, and subcontractors add them as part of every residential build. None of this is a gap in the plans; it's the normal division of labor in construction. What's included in every plan set →
Can I preview the plan before buying?
We offer Bid Sets for $500. A Bid Set includes the floor plans and elevation views, labeled "Not For Construction," and is ideal for getting an initial cost estimate from a builder before committing to the full plan. If you move forward, the $500 applies as credit toward your full plan purchase. Contact us to request a Bid Set →
Which foundation type is right for my lot?
Different lots call for different foundations. Here's the quick version:
Slab — Best for flat lots, often in warmer climates. Simple, cost-effective, and low-maintenance, with the main level built directly on grade.
Crawl Space — A good fit for flat or gently graded lots where you want the floor raised off the ground, with room underneath for access to plumbing and mechanical runs.
Daylight Basement — Ideal for gently to moderately sloped lots. The lower level is set into the grade but still gets windows and natural light on the downhill side, turning what would be a dark basement into real living space.
Walkout Basement — Made for sloped and hillside lots. The lower level opens directly to grade on the downhill side, with full doors and windows and direct outdoor access, so it lives like a true part of the home rather than a basement.
The foundations available for a given plan are shown in the options above. If you need a foundation type that isn't listed for the plan you want, reach out and we'll let you know what's possible. Alternate or changed foundations are handled as a modification and add to your timeline.
Can I modify this plan?
Yes, and it's completely expected. Most buyers change at least something. We'd recommend starting with a local drafter, designer, or engineer who knows your area's codes and site conditions. For plan-level changes, we can also point you in the right direction. Minor changes are often handled on-site by your builder. See how modifications work →
PDF or CAD: Which do I need?
PDF works for most builds. Those are your construction documents, ready to print and share. If you're planning significant modifications, or your engineer or contractor prefers to work directly in the files, the CAD add-on (+$500) is worth it. Not sure? Start with PDF, you can always come back and add CAD later. Full comparison: PDF vs. CAD →
Can I flip the plan? (Right-Reading Reverse)
Yes. A right-reading reverse (+$250) mirrors the entire plan, all floors, foundation, roof plan, and elevations, while keeping every dimension, label, and note fully readable rather than backwards. It's the clean way to flip a layout to suit your lot or your view. How right-reading reverse works →
What does the build license allow?
Your purchase includes a Single-Structure License: the right to build this plan once, on one lot. You can print as many copies as you need for your build team and share them with your builder, engineer, and local municipality for that one project. Planning to build it more than once? An Unlimited Build License (+$500) is available at checkout or any time after, always the same price. Plain-English license overview →
How long until I get my plans?
Standard digital delivery is 1–2 business days after your signed license, Monday through Friday. (Weekend orders begin processing Monday.) Add-ons like a right-reading reverse or an alternate foundation add 3–4 business days. Files are delivered by email once your license is signed. More on how it works →
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