4-Bed Modern Mountain House Plan with Study and Bonus Room – 3,892 sq ft (Plan 33266ZR) from ArchitecturalDesigns, offers a compelling layout for a contemporary mountain-style home designed for spacious luxury yet single-level living.

The home is styled in a modern-mountain aesthetic: clean lines, large glass sliders at the rear, a broad frontage of approximately 74′ 6″ (width) and a depth of 91′ 8″.  The ridge height is noted as 29′ 3″, giving a generous vertical presence while still remaining single-story.  Exterior walls are specified as 2×6 construction, which supports better insulation and thicker wall assemblies — consistent with mountain homes where thermal performance matters.

A key design element is the large rear porch (571 sq ft) with tremendous sliding doors (16′ sliders) that blur the boundary between indoor living spaces and outdoor entertaining.  The front features double front doors opening into a foyer with a 12′4″ ceiling — giving a lofty welcome and a strong first impression.

Interior Layout & Flow

As you enter through the double doors you arrive into a spacious foyer with the high ceiling mentioned above. From there a gallery corridor links the major living spaces and the bedroom wings. On one side of the home sits the open concept great room, kitchen and dining area — all flowing to the rear porch via the large sliders. Such a layout places the social, entertainment-oriented spaces at the heart of the home, with excellent indoor–outdoor connection.

The kitchen is fitted with a large walk-in pantry and the dining room has direct lanai access and a dry bar — a nice touch for entertaining.  To the right side of the home (when facing the rear) you’ll find two guest suites, a powder bath, and a laundry room — all conveniently located. On the left side is the owner’s (master) suite, fronted by a secluded positioning, with a spacious shower, freestanding tub and dual vanities — delivering a luxe retreat feel. A further guest suite at the front rounds out the total of four bedrooms.

A two-car attached garage (604 sq ft) enters into a mudroom, which connects to the powder bath and laundry room — nicely keeping utility and messy-entry zones tucked out of sight but well-integrated.

Dimensions & Key Specs

Heated area: 3,892 sq ft (all on one level)

Width: 74′ 6″, Depth: 91′ 8″

Ceiling height (first floor): 10′ standard, and foyer gets 12′4″

Bedrooms: 4; Bathrooms: 4 full + 1 half

Architectural styles listed: Hill Country / Modern / Mountain / Ranch / Transitional — showing a versatile blend of influences.

Special features include a study/library near the foyer, a flex room/bonus room option, outdoor fireplace and outdoor kitchen possibilities.


Interior Walk-through

Upon entering, the foyer welcomes you and provides lines of sight through to the rear porch, which is ideal for capturing views or bringing light deep into the house. To the side, pocket doors open to the study/library — ideal for work-from-home or a quiet retreat. The gallery corridor gently guides you to the heart of the home — the great room and dining/kitchen zone, which opens fully to the outside. The rear porch becomes effectively another living room when the weather allows — perfect for mountain or nature settings.

On the guest side (right wing) you’ll find two comfortable suites, each with its own bath, making it convenient for visitors or multi-generational living. The laundry room and powder bath nearby add utility and convenience. On the left wing, the master suite is deliberately tucked away for maximum privacy. The spa-style bath, dual vanities, freestanding tub and generous shower all underscore the premium intent. The third guest suite at the front offers flexibility — perhaps for a teenager or dedicated guest.

The bonus room (optional finishing) gives the potential for a loft/game room/media space — ideal for future expansion. The mudroom from the garage helps manage everyday arrivals and storage, keeping clutter contained.

Estimated Costs & Considerations (USD)

While specific construction costs depend heavily on site conditions, finishes, region and builder rates, for a home of ~3,900 sq ft in many U.S. markets you might estimate a rough shell-and-basic-finish cost in the range of US $200–300 per sq ft, meaning a range of US $780,000 to US $1,170,000 (or more for premium finishes or challenging site). For a mountain setting where materials (stone, heavy timbers, high-end glazing) tend to cost more, budget toward the higher end or beyond. For Tanzania or other regions the cost would be different (imported materials, shipping, labour standards all shift the margin).

Suitability & Site Considerations

Given the generous width (74′6″) and depth (91′8″), the home demands a sizeable parcel of land, especially if you want meaningful setbacks, scenic views and outdoor living space. The large rear glass sliders and porch suggest orientation toward a view or nice outdoor environment — a sloping mountain-style site could be ideal.

The slab foundation is specified (foundation type: slab).  If your site is uneven or has significant grade, you may need to adapt (e.g., walk-out basement or elevated foundation) which could impact cost and design. The ridge height of 29′ 3″ means you’ll need local zoning compliance for height in your area.

Summary

This plan masterfully blends open, flowing communal spaces with well-zoned private wings, all on one level — very appropriate for modern mountain-style living with views, indoor/outdoor integration and flexibility for guests and family. The design balances elegance (high ceilings, spa bath, large sliders) with practicality (mudroom, laundry, guest suites).

If you like, I can prepare a customised cost estimate for building this plan in Arusha, Tanzania — including typical material/labour rates locally and possible adaptations for climate (e.g., insulation, veranda shading, ventilation) and site conditions.