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20 40 House Plans

20 40 House Plans

Table of Contents

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.

20 40 House Plans
20 40 House Plans

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.

house plan 800 sqft 20×42 ft
house plan 800 sqft 20×42 ft

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.


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.

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