Are you looking for small house layouts to build an efficient modern ADU? Explore the world of modern Accessory Dwelling Units (ADUs) and discover amazing designs improving compact living spaces.
What is a Modern ADU?
An Accessory Dwelling Unit (ADU) is a secondary, self-contained residential unit on the same property as a single-family home. Also known as “granny flats”, “guest houses”, or “in-law suites,” they offer their own independent living, sleeping, cooking, and bathroom facilities.
Join us as we explore trending small house layouts for building stand-alone modern ADUs. They are perfect if you need to fit a guest/pool house, granny flat, or small rental on your existing lot.
1. 506 Sq Ft Charming Cottage Layout
Imagine waking up in this charming, picturesque cottage – the perfect size for any guest house or granny flat. With a modest footprint of just 22’x26′, this cozy dwelling can easily fit on any small lot. Step outside onto your covered porch to savor your morning coffee as you take in the sweet sounds of chirping birds, rain or shine.
Inside, a warm and inviting living space awaits – complete with bar seating for casual meals, a compact kitchen equipped for whipping up a quick, healthy meal, and a cozy spot to relax after a busy day.
Enjoy the luxury of a bedroom with a spacious closet for all your essentials and a full bath just steps away. And don’t forget, you have the freedom to customize the space to fit your specific needs.
Need a larger bathroom? No problem. Want to minimize your laundry room and have a bigger bath? It’s your small house layout, so make it custom.
This cottage is the perfect oasis – with all the comfort and convenience you or your guests need. So, this charming cottage offers a simple lifestyle in a modern layout with just 506 square feet.
2. ADU with Vaulted Living Room (578 sqft)
Are you thinking of building an ADU on a narrow lot? Take a look at this 1-bedroom ADU layout. With 578 sq ft of total living space and an open-concept living room with vaulted ceilings, you have a spacious small house layout.
Furthermore, both rooms have vaulted ceilings: the living room up front and the bedroom in the back, which makes a small space feel bigger. Though there is no dedicated laundry room in this layout, you have space for a stacked washer/dryer. Also, with a bigger covered porch, there is more room to enjoy the outdoors and have a little herb garden.
3. Small House Layout: 34’x21′
This modern ADU offers an open-concept layout that maximizes space and light. When you explore the interior renderings full of natural light, it is hard to believe that the total living space is only 583 square feet. The shed roof design and a set of clerestory windows do wonders for the overall feel of this spacious interior.
Furthermore, the living room connects to an outdoor patio for seamless indoor-outdoor living. It is a breeze to entertain guests and family with this well-appointed kitchen, central island, and spacious patio.
At the end of the day, enjoy a good night’s sleep in the modern bedroom overlooking a patio. Also, you have access to a spa-like bathroom with an extra linen closet and a bathtub.
Often, with small house layouts, there is a question of where the ‘ mechanics’ of the home would fit. That includes a washer/dryer, a water heater, an electrical panel, backup batteries, an A/C unit, etc. So, it’s important to see a well-marked utility room in this small layout.
4. 600 Sq Ft ADU with Board-and-Batten Siding
Attention ADU builders: Are you a fan of the charming barnhouse style? If so, you’ll swoon over this 600 sq ft 1-bedroom ADU. With its simple 30′ x 20′ footprint and attractive board-and-batten exterior, it boasts ultimate curb appeal.
Plus, the clever kitchen design offers a budget-friendly solution by lining up all cabinets and appliances along one wall. This not only simplifies plumbing during construction but also saves on maintenance costs in the long run.
The spacious 11′ x 12′ bedroom provides convenient access to the well-appointed bathroom and laundry unit.
While there is no covered porch in this layout, a skilled DIYer can easily add it to their weekend outdoor project list. Take your ADU project to the next level with this charming and functional small-house layout!
5. Modern ADU with Cathedral Ceilings (654 sqft)
If cathedral ceilings are a must in your ADU interior, take a closer look at this small house layout. With only 654 sq ft of total living space, you have a light-filled open-concept living area. As a result, you have a stylish interior with endless possibilities, from entertaining guests to generating extra income.
Most importantly, a seamless flow between the living, dining, and kitchen spaces lets you enjoy a spacious environment while cathedral ceilings add elegance and enhance natural light.
Also, everyone will appreciate a spacious bedroom, a walk-in closet, a dedicated laundry room, a mechanical room, and a full bath.
At first glance, a covered patio may seem small and unassuming, but with a little creativity and planning, it can be transformed into a spacious and versatile extension of your home. Another concern may be the budget.
However, building a covered patio can actually be a cost-effective alternative to other outdoor living options. It can provide shelter for your outdoor furniture, eliminating the need for replacement and maintenance. Plus, it can increase the overall value of your ADU, making it a smart investment in the long run.
6. Country Cottage House Plan (684 sq ft)
This charming 684 sq ft cottage house plan features 1 bedroom, 1 full bath, and a classic cottagecore exterior. Imagine sipping your morning coffee on a cozy covered porch while listening to the birds sing and feeling the gentle breeze on your skin.
Also, hosting a summer barbecue with friends and family, protected from the scorching heat and unpredictable rain, becomes fun rather than a chore. The possibilities are endless with a classic covered porch, making it the perfect addition to any small house layout.
From a cozy covered porch, step inside into the thoughtfully designed living space. With a well-equipped kitchen and a sitting area with a cozy fireplace, you have an integrated great room.
Enjoy R&R in a spacious bedroom offering a comfortable retreat with a walk-in closet and easy access to the full bathroom. A dedicated laundry space and a linen closet in the hallway make everyday tasks a breeze.
7. Small House Layout with 2 Bedrooms
Among all small house layouts, this is one of the most popular plans. Let’s explore its characteristics to understand why homeowners are drawn to this small ADU design.
With 800 square feet, this ADU offers 2 bedrooms, 2 baths, an open-concept living room, and an open patio. With a simple layout and roofline, you have all the ingredients for a perfect small ADU design.
So, if you’re dreaming of building an accessory dwelling unit, a rental cottage, a vacation home, or downsizing, this small house offers comfortable living. Under 1,000 sq ft on a single level, it fits the lifestyle of both retirees and families with small kids.
