What are 20 40 house plans? This article explores the pros and cons, floor plan layouts, costs, and considerations of building a 20×40 foot home. Includes 5 key FAQs on constructing these narrow rectangular homes.

Introduction to 20×40 House Plans
A 20×40 house is a narrow rectangular-shaped home that is 20 feet wide and 40 feet long. These homes are an efficient use of space and can accommodate 1-3 bedrooms depending on the layout.
Pros of a 20×40 House
Some benefits of a 20×40 foot print include:
- Efficient use of space
- Lower building costs due to smaller square footage
- Easier to heat and cool
- Good for narrow urban lots
Cons of a 20×40 House
Potential downsides include:
- Limited space, especially if adding more bedrooms
- Less private yard space in back
- Need to build up for more space
Common 20×40 Floorplans
20×40 homes can have different layouts but some popular options include:
One Bedroom, One Bath Layout
A simple 20×40 house plan with an open concept living/dining/kitchen, 1 bedroom and 1 bathroom.

Two Bedroom, One Bath Layout
Adds a second bedroom while keeping one shared bathroom. Living areas remain combined.
Three Bedroom, Two Bath Layout
Includes three bedrooms, two bathrooms with a more closed floorplan with separated living room, kitchen and dining areas.
Customizing Your 20×40 House
To maximize a 20×40 home, consider:
- Vaulted ceilings to add height
- Open concept main living areas
- Creative storage solutions like under stair spaces
- Multi-purpose furniture like bunk beds and sleeper sofas
- Outdoor living space in back with deck or patio
Important 20×40 House Features
Key elements that make a 20×40 home functional include:
- Good natural lighting from ample windows
- Energy efficiency
- Half bathroom/powder room
- Covered front porch
- Laundry room or closet
Cost to Build a 20×40 House
A basic 20×40 home can be built for around $100-$150 per square foot. This puts total costs in the range of $80,000-$120,000 depending on materials, layout and location.
Is a 20×40 House Right for You?
A 20×40 house plan is best for small families, guest homes, mother-in-law suites or Tiny Home enthusiasts. The limited space and narrow shape won’t work for everyone but can provide an affordable option.
Conclusion
With creative design, a 20×40 house can provide efficient, affordable housing. Evaluate your needs and research floorplans to see if a home this size could work for your lifestyle.
20 40 House Plans FAQs:
Q1: How many square feet is a 20×40 house?
A1: A 20×40 house is 800 square feet.
Q2: How many bedrooms can a 20×40 house have?
A2: Typically 1-3 bedrooms depending on the layout.
Q3: What’s the cost per square foot to build a 20×40 house?
A3: Around $100-$150 per square foot, so total costs are usually $80,000-$120,000.
Q4: What are common floorplans for a 20×40 house?
A4: One bedroom/one bath, two bed/one bath, and three bed/two bath layouts.
Q5: Is a 20×40 house big enough for a family?
A5: It can be for a small family depending on needs, storage solutions and layout.