Modern 3-Bedroom Compact Small House Plan, 1150 sq ft, with 20’ x 31’ footprint only!

If you are concerned about eco-friendly living, or just want to build a small detached guest house at the back of your property, this compact small house design might be suitable for you.

This 3-bed small house plan has only 20′ x 31′ footprint and also potentially be built in modules. So the construction and maintenance costs can be significantly reduced, making this house super affordable. 



General house specification:

  • 1,150 sf 2-story structure
  • 3 Beds + 1 Small Den
  • 1.5 Baths⁠⠀
  • 20’-0” W x 31’-0” D
  • Laundry / utility storage room
  • Outdoor porches
  • Attic spaces for future development


The Design

This small house plan is suitable for a very tight and small plot of land. You can also build this as an off-grid independent cabin or secondary unit / detached ADU / granny suite. 

The original design comes with a slab foundation. You can also opt for either basement structure (with extra living space) or with a crawl space – depending on the existing site condition where you are planning to build. 

Despite its tiny shape, this house has ample natural lights. The interior looks spacious due to its compact and efficient layout and its modern full-height windows.

We use natural material finishes with modern touch for the exterior, e.g. stucco / cement finish, stones, metal roof, wood slats or siding clapboard (optional) and black frame door windows. 


Other Tiny House Plans

If you would like to see the smaller version of this compact small house plan (760 sq ft), please check this Tiny House Plan.




Starter Kit Packages

A Starter Kit is a Schematic / Conceptual Set of the original design, in .PDF file format (non-vector files). The set includes floor plans, roof plan, 4-side elevations, and building sections of the original design (no design modifications) at a smaller scale (A3 or ANSI B paper size). This set of schematic drawings will come with measurements/sizes, room annotations, basic area calculation, etc, so it will be useful if you want to know more about the design prior to buying the architectural House Plans (especially if you want to make changes). If you are interested in purchasing the schematic / conceptual set before ordering the blueprint / House Plan set, please order the Starter Kit through this link:

Order Starter Kit Package


House Plan Packages – Basic Plan Set (Original / Modified Design)

The blueprint / House Plan is available for purchase, either the original design or modified version. We can modify the architectural design and drawings to suit your needs. For example: reshape and resize the house so it can fit your land, rearrange the rooms and internal layout to fit your family needs and requirements, or modify the facade design, windows and roof.

The basic plan set is available in vector PDF and DWG/CAD formats and comes with the following items:

  • Floor Plans 
  • Roof Plan
  • 4-side Building Elevations
  • Building Sections (min. 2)
  • Exterior and/or Interior Rendering Images (min. 10 – 15 views)
  • A Non-Exclusive Personal Single Use License

Additional drawings and other architectural design services are available if needed; e.g. additional drawings such as foundation plan, electrical plans, ceiling plans, site plan, etc.

Costs to build the house per square foot varies depending on several factors. Usually you can use our basic house plan or drawing set to obtain an initial cost estimate from a local builder in your city / country. Furthermore, if you buy our house plans, you can always customize the original design and plans to suit your preferences and budget (e.g. change the layout and square footage, modify door-window types and sizes, change some architectural material finishes, etc).

If you are interested in purchasing the House Plan and want to get a quote / fee proposal from us, please fill out our Order Form via this link:

Order House Plan Package


We also offer architectural services to make custom / bespoke designs. If you would like to get a quote / estimates from us, please use this link to place an order:

Order Custom Design Package



Please read our How It Works page for more details about our packages and typical project workflow. Please also visit Our Services and Products page to see the details and quality of our architectural drawings. If you want to estimate our design fees, please see our current Price List.



Most answers to general queries can be found on our FAQ page. If you have other enquiries about information that is not provided yet, feel free to contact us here:

Contact Us


All images and drawings are protected by copyright and not to be produced, copied, or edited in any format without written consent from ANK Studio.