Building a Small Back Deck: Your Step-by-Step DIY Guide

Margaret Jul 01, 2026

Adding a small back deck to your home can significantly enhance your outdoor living space, increase your home's value, and provide a cozy spot for relaxation and entertainment. This guide will walk you through the process of building a small back deck, from planning to completion.

How to Build a Small Freestanding Deck
How to Build a Small Freestanding Deck

Before you start, ensure you have the necessary permits and understand your local building codes. It's also crucial to choose a design that complements your home's architecture and suits your needs.

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How to Build a Low Deck on Budget

Design and Planning

Start by determining the size and shape of your deck. A small back deck typically ranges from 100 to 200 square feet. Consider the layout of your backyard and the function of your deck – will it be used for dining, lounging, or both?

a piece of wood that is sitting in the grass
a piece of wood that is sitting in the grass

Sketch out your design, including measurements, and consider using deck design software for a more accurate visualization. Don't forget to include railings, stairs, and any built-in features like benches or planters.

Choosing Materials

Building a Small Deck
Building a Small Deck

Selecting the right materials is crucial for the longevity and appearance of your deck. Pressure-treated lumber is a popular choice due to its durability and affordability. Composite materials are low-maintenance but more expensive.

For railings, consider vinyl, metal, or glass balusters. Ensure your chosen materials comply with local building codes and are suitable for your climate.

Budgeting

Cheap DIY Deck Build Stunning Ground Level Deck Under $300
Cheap DIY Deck Build Stunning Ground Level Deck Under $300

Create a detailed budget, including materials, labor (if hiring professionals), and any permits or inspections. Don't forget to account for hidden costs like concrete for footings or additional hardware.

To save money, consider doing some of the work yourself, such as demolition, site preparation, or finishing touches. However, be honest about your skill level and when to hire professionals.

Building the Deck

How to Build a Deck Like a Pro
How to Build a Deck Like a Pro

Once you have your design, materials, and budget in order, it's time to start building. Here's a step-by-step guide to help you through the process:

Site Preparation

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How to build a floating deck
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How to Build an Elevated Deck Step-by-Step
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How to build a gorgeous mini deck with awning
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an unfinished bed frame sitting in front of a house
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How To Build a Deck for Less than $250 - 2 Bees in a Pod
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How to Build a Small Freestanding Deck
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Small Deck Makeover Before And After Ideas To Inspire Your Backyard
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Backyard Makeover: Floating Deck - Phase 1
before and after deck over patio in front of a house with the words, before and after decks over patio
before and after deck over patio in front of a house with the words, before and after decks over patio
the ground level deck is being built with a wooden barrel on it and grass in front
the ground level deck is being built with a wooden barrel on it and grass in front
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How to build a deck step by step
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DIY Hacks for Building a Floating Backyard Deck with TuffBlocks

Clear the area where your deck will be built, removing any vegetation, rocks, or debris. Ensure the site is level and mark out the dimensions of your deck using stakes and strings.

Check for any underground utilities by calling your local utility companies before digging. You may need to hire a professional to excavate the site and pour concrete footings.

Building the Frame

Begin by laying out the joists, ensuring they are evenly spaced and level. Attach them to the beams using appropriate hardware. Then, install the beam-to-post connections, following your chosen method (e.g., ledger board, post-to-beam, or beam-to-post with brackets).

Next, install the decking boards, starting from one corner and working your way across. Ensure they are evenly spaced and follow the desired pattern (e.g., staggered, straight, or herringbone).

Adding Railings and Stairs

Measure and cut the railing posts, ensuring they are level and evenly spaced. Attach them to the frame using appropriate hardware. Install the balusters, following your chosen spacing and pattern.

For stairs, calculate the rise and run based on your desired height and tread depth. Build the stringers first, then attach the treads and risers. Ensure your stairs comply with local building codes and provide adequate traction.

Finishing Touches

Once the basic structure is complete, it's time to add the finishing touches. This may include installing built-in features like benches or planters, adding lighting, or applying a sealant to protect your deck.

Sealing and Finishing

Choose a sealant that complements your deck's material and color. Apply it evenly, following the manufacturer's instructions. Allow the sealant to dry completely before using your deck.

Consider applying a stain or paint to enhance your deck's appearance and provide additional protection. Again, choose a product that is suitable for your deck's material and climate.

Building a small back deck can be a rewarding project that adds value and enjoyment to your home. With careful planning and attention to detail, you can create a beautiful outdoor space to relax and entertain. Happy building!