4 Bedroom House Plans with Bonus Room: 2,850 Sq Ft with a Ground-Floor Guest Bedroom

2,848 sq ft living · 4 bedrooms · 3 baths · 2 stories · garage · 49'-3" × 36'-9"

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4 bedroom house plans with bonus room — dimensioned floor plan, level 1
Level 1
4 bedroom house plans with bonus room — dimensioned floor plan, level 2
Level 2

This two-story plan has 2,850 square feet of living space, not counting the garage, on a 49'-3" × 36'-9" footprint. A front porch leads into the 7'-10" × 8'-4" foyer. The ground floor holds the kitchen (10'-1" × 16'-2"), a 12'-7" × 11'-11" dining room, a 13'-5" × 22'-5" family room and a guest bedroom with a guest bath nearby. The mudroom, pantry and laundry form the service side, next to the 2-car garage.

Upstairs, the primary bedroom (12'-5" × 17'-6") connects to a 13'-3" × 7'-0" bath and a 7'-2" × 10'-1" walk-in closet. Bedrooms 2 and 3 and a hall bath open off the 26'-1" upstairs hall. The 20'-10" × 22'-0" bonus room sits over the garage, so it can be used as a playroom, media room or office without taking space from the bedrooms. In total the plan has four bedrooms and three baths.

Layout highlights

  • Guest bedroom (7'-10" × 15'-3") on the ground floor, with a guest bath next to it.
  • Family room of 13'-5" × 22'-5" sits beside the 12'-7" × 11'-11" dining room.
  • Primary suite upstairs: 12'-5" × 17'-6" bedroom, 13'-3" × 7'-0" bath, 7'-2" × 10'-1" closet.
  • Bonus room of 20'-10" × 22'-0" over the garage, reached from the upstairs hall.
  • Mudroom (10'-0" × 6'-2"), pantry and laundry sit beside the 20'-6" × 18'-2" garage.

Room sizes

RoomLevelSizeArea
Stair13'-7" × 11'-7"42 sq ft
Hall14'-5" × 11'-9"52 sq ft
Guest Bath14'-5" × 10'-8"47 sq ft
Foyer17'-10" × 8'-4"65 sq ft
Guest Bedroom17'-10" × 15'-3"119 sq ft
Dining112'-7" × 11'-11"150 sq ft
Family Room113'-5" × 22'-5"300 sq ft
Kitchen110'-1" × 16'-2"164 sq ft
Pantry110'-0" × 4'-9"47 sq ft
Laundry110'-0" × 4'-6"45 sq ft
Mudroom110'-0" × 6'-2"62 sq ft
2-Car Garage120'-6" × 18'-2"372 sq ft
Stair24'-5" × 11'-7"51 sq ft
Upstairs Hall226'-1" × 4'-10"126 sq ft
Hall Bath25'-9" × 10'-1"58 sq ft
Walk-in Closet27'-2" × 10'-1"72 sq ft
Primary Bath213'-3" × 7'-0"93 sq ft
Primary Bedroom212'-5" × 17'-6"217 sq ft
Bonus Room220'-10" × 22'-0"457 sq ft
Bedroom 2210'-9" × 11'-7"125 sq ft
Bedroom 3210'-11" × 11'-7"127 sq ft

Who this plan suits

This plan suits families who want a bedroom on the entry level for guests or relatives, plus a separate upstairs floor for the primary suite, two bedrooms and a flexible bonus room. It needs a lot that fits a 49'-3" × 36'-9" footprint, plus room for the front porch and driveway access to the garage.

How this plan was made

It was generated in AI Architectures Plan Studio from this one-line brief: “Two-story house, 4 bedrooms, 3 baths, ground floor kitchen, dining, family room, guest bedroom, mudroom; upstairs primary suite, 2 bedrooms and a large bonus room over the garage, attached 2-car garage, front porch, about 2,700 sq ft of living space (garage not included).” An AI architect drafted the room program, a layout solver placed every wall and door, and the plan was checked automatically for room sizes, circulation and daylight. The same project produced the PDF sheets, layered DXF, IFC model and 3D model you can download above.

Frequently asked questions

What are 4 bedroom house plans with a bonus room?

They are plans with four dedicated bedrooms and one additional finished space that is not counted as a bedroom, often placed over the garage. In this plan the bonus room measures 20'-10" × 22'-0" and is separate from the guest bedroom, the primary bedroom and bedrooms 2 and 3.

What affects the lot and cost of building this plan?

The plan has 2,850 sq ft of living space on two levels and a 49'-3" × 36'-9" footprint, so the lot must fit that width and depth with setbacks. Cost drivers include the bonus room over the garage, the three baths and local labor and material prices, which vary by site.

Can I change this plan by chat?

Yes. You can describe changes such as resizing the bonus room, converting it to a fifth bedroom, moving the garage to the other side or fitting a narrower lot. The layout is regenerated so the rooms stay connected, and the measurements update with it.

How do I use the PDF, DXF and IFC files?

The PDF is for reviewing and printing the floor plans and room sizes. The DXF opens in common CAD programs for drafting and redlining, and the IFC imports into BIM software. A local architect or engineer should review the files before permits or construction.

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