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How To Build A Concrete Block Shed How To Build A Concrete Block Shed

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How To Build A Concrete Block Shed

Written by: Harper Martinez

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Kathryn Senior
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Reviewed by
Kathryn Senior

Senior Editor in Create & Decorate, Kathryn combines traditional craftsmanship with contemporary trends. Her background in textile design and commitment to sustainable crafts inspire both content and community.

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Learn how to build a DIY concrete block shed with our step-by-step guide. Get creative with your DIY & Crafts project today!

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Building a concrete block shed is a rewarding and practical DIY project that can provide valuable storage space and enhance the functionality of your property. Whether you're a seasoned DIY enthusiast or a novice looking to embark on a new construction endeavor, this comprehensive guide will walk you through the step-by-step process of creating a durable and versatile concrete block shed.

Constructing a concrete block shed offers numerous advantages, including durability, affordability, and customization options. Unlike traditional wooden sheds, a concrete block structure provides exceptional strength and longevity, ensuring that your investment will withstand the test of time and the elements. Additionally, the versatility of concrete blocks allows for a wide range of design possibilities, enabling you to tailor the shed to meet your specific storage needs and aesthetic preferences.

Throughout this guide, you'll gain valuable insights into the planning, preparation, and construction phases of the project. From laying the foundation to installing the roof and adding finishing touches, each step is carefully outlined to empower you with the knowledge and confidence needed to successfully complete your concrete block shed.

By following this guide, you'll not only acquire practical construction skills but also have the opportunity to unleash your creativity and bring your vision to life. Whether you envision a compact storage space for gardening tools or a spacious workshop for DIY projects, the process of building a concrete block shed allows you to transform your ideas into a tangible and functional structure.

As you embark on this journey, remember that patience, attention to detail, and a willingness to learn are key ingredients for a successful outcome. Embrace the process, enjoy the sense of accomplishment that comes with each completed step, and envision the countless possibilities that await as you embark on this fulfilling DIY adventure. Let's dive into the first step: Planning and Preparation.


Step 1: Planning and Preparation

Before diving into the physical construction of your concrete block shed, meticulous planning and thorough preparation are essential to ensure a smooth and successful building process. This initial phase sets the foundation for the entire project and significantly influences the structural integrity and functionality of the shed. Here's a detailed breakdown of the key considerations and steps involved in the planning and preparation stage:

  1. Site Selection: Begin by carefully selecting the location for your concrete block shed. Consider factors such as accessibility, sunlight exposure, and proximity to existing structures. Ensure that the chosen site complies with local building codes and regulations.

  2. Design and Layout: Determine the size, layout, and design of your shed based on its intended purpose and your specific storage needs. Sketch out a rough floor plan and elevation drawings to visualize the structure and make necessary adjustments before proceeding further.

  3. Permit and Regulations: Research and obtain any required permits or approvals from local authorities before commencing construction. Familiarize yourself with zoning regulations, setback requirements, and any restrictions related to shed construction in your area.

  4. Foundation Considerations: Evaluate the soil condition and topography of the chosen site to determine the most suitable foundation type for your shed. Options may include a concrete slab, concrete footings, or piers, depending on the soil stability and local building codes.

  5. Material Procurement: Create a comprehensive list of materials and tools required for the project, including concrete blocks, mortar, reinforcing steel, lumber for framing, roofing materials, and essential construction tools. Research local suppliers and gather cost estimates to establish a budget for the project.

  6. Timeline and Schedule: Develop a realistic timeline for the construction process, considering factors such as weather conditions, availability of assistance, and personal time commitments. Establish a detailed schedule outlining each phase of the project to maintain a structured approach.

  7. Safety Measures: Prioritize safety by identifying potential hazards and implementing safety measures. Acquire necessary personal protective equipment (PPE) such as gloves, safety goggles, and sturdy footwear. Familiarize yourself with safe lifting techniques and proper tool usage.

By meticulously addressing these crucial aspects during the planning and preparation stage, you'll lay a solid groundwork for the subsequent construction phases of your concrete block shed. This thoughtful approach not only streamlines the building process but also minimizes potential setbacks, ensuring a rewarding and fulfilling DIY experience.


Step 2: Gathering Materials and Tools

The successful execution of any construction project hinges on the availability of the right materials and tools. When it comes to building a concrete block shed, the process of gathering materials and tools is a critical step that sets the stage for the physical construction phase. Here's a comprehensive overview of the essential components required for this stage:


  1. Concrete Blocks: These form the primary building material for the shed walls. Opt for high-quality concrete blocks that offer durability and structural integrity.
  2. Mortar: Select a reliable mortar mix suitable for bonding the concrete blocks together. Consider factors such as weather resistance and load-bearing capabilities.
  3. Reinforcing Steel: Also known as rebar, reinforcing steel provides additional strength to the concrete block walls. It helps reinforce the structure and enhance its resilience.
  4. Lumber for Framing: Depending on the shed design, you may need lumber for framing door and window openings, as well as for constructing the roof trusses.
  5. Roofing Materials: Choose appropriate roofing materials such as shingles, metal panels, or corrugated sheets based on your shed's design and local weather conditions.
  6. Foundation Components: If not already acquired during the planning phase, procure the necessary materials for the chosen foundation type, such as concrete mix, gravel, and formwork.


  1. Masonry Trowel: Essential for applying mortar to the concrete blocks during the wall construction process.
  2. Level: A reliable level ensures that the concrete block walls are plumb and level, contributing to the structural stability of the shed.
  3. Concrete Saw: If adjustments to the concrete blocks are needed, a concrete saw facilitates precise cutting to fit the blocks as per the design requirements.
  4. Hammer and Nails: These basic tools are indispensable for securing the lumber framing components and assembling the roof structure.
  5. Measuring Tape: Accurate measurements are crucial in ensuring the precise alignment and dimensions of the shed components.
  6. Wheelbarrow and Shovel: For mixing and transporting concrete, mortar, and other foundational materials.

By meticulously procuring the necessary materials and ensuring the availability of essential tools, you set the stage for a seamless and efficient construction process. Additionally, consider factors such as delivery lead times and storage requirements for the materials to maintain an organized and well-prepared construction site. With the materials and tools in place, you're poised to transition to the next phase: Laying the Foundation.


Step 3: Laying the Foundation

The foundation serves as the anchor of any structure, providing stability and support for the entire building. When it comes to constructing a concrete block shed, the process of laying the foundation is a critical precursor to building the walls and installing the roof. Here's a detailed exploration of the essential steps involved in laying a solid foundation for your shed:

Site Preparation:

Begin by clearing the chosen site of any debris, vegetation, or obstacles that may impede the foundation construction. Use a shovel, rake, or a small excavator to level the ground and remove any organic matter to create a clean and even surface for the foundation.

Marking and Layout:

Using wooden stakes and string lines, mark the perimeter of the shed's foundation according to the predetermined dimensions and layout. Ensure that the corners are square by measuring diagonally from corner to corner and adjusting the layout as needed.


Excavate the marked area to the specified depth, accounting for the foundation type and local building codes. Common foundation types for concrete block sheds include concrete slab and concrete footings. Excavate the soil to the required depth, accounting for the thickness of the foundation and any additional considerations such as drainage.

Formwork Installation:

For a concrete slab foundation, construct formwork using lumber and plywood to create a containment structure for the concrete. Ensure that the formwork is securely braced and leveled to prevent any shifting or misalignment during the concrete pouring process.

Reinforcement Placement:

If utilizing a concrete slab foundation, place a grid of reinforcing steel (rebar) within the formwork to reinforce the concrete and enhance its load-bearing capacity. Secure the rebar in place using wire ties and ensure proper clearance from the bottom and sides of the formwork.

Concrete Mixing and Pouring:

Prepare the concrete mix according to the manufacturer's instructions, ensuring the appropriate ratio of cement, aggregate, and water. Pour the concrete into the formwork, distributing it evenly and using a screed or bull float to level the surface and remove any excess material.

Curing and Finishing:

After the concrete is poured, allow it to cure and gain strength over the specified period, typically several days. During the curing process, keep the concrete moist to prevent cracking and ensure optimal strength development. Once cured, remove the formwork and inspect the foundation for any imperfections or irregularities, addressing them as needed.

By meticulously executing these foundational steps, you establish a solid and reliable base for the subsequent phases of your concrete block shed construction. The foundation not only supports the structural integrity of the shed but also contributes to its longevity and resilience, laying the groundwork for a durable and functional outdoor space. With the foundation in place, you're ready to progress to the next phase: Building the Walls.


Step 4: Building the Walls

With the solid foundation in place, the next pivotal phase in constructing a concrete block shed involves erecting the walls. This stage marks the transformation of the project from groundwork to vertical progression, shaping the physical form of the shed. Here's a comprehensive breakdown of the essential steps and considerations involved in building the walls:

Wall Layout and Marking:

Begin by carefully marking the layout of the walls on the foundation, ensuring precise alignment with the predetermined dimensions and design. Use chalk lines and measuring tools to establish clear guidelines for the placement of the concrete blocks.

Mortar Preparation and Application:

Prepare the mortar mix according to the manufacturer's specifications, achieving the optimal consistency for effective adhesion. Using a masonry trowel, apply a generous layer of mortar along the foundation where the first course of concrete blocks will be laid.

Laying the Concrete Blocks:

Carefully position the first course of concrete blocks on the mortar bed, ensuring level alignment and consistent spacing between the blocks. Use a spirit level to verify the horizontal and vertical alignment of the blocks, making necessary adjustments to maintain precision.

Vertical Reinforcement:

As the wall height increases, incorporate vertical reinforcing steel (rebar) at specified intervals within the hollow cores of the concrete blocks. This reinforcement enhances the structural integrity and stability of the walls, especially in regions prone to seismic activity or high winds.

Mortar Joints and Tooling:

After each block is laid, fill the vertical and horizontal joints with mortar, ensuring a solid and uniform bond between the blocks. Use a striking tool to tool the mortar joints, creating a clean and professional finish while enhancing the overall strength of the wall assembly.

Window and Door Openings:

If the shed design includes openings for windows and doors, frame these openings with lumber and incorporate lintels or headers to support the load above the openings. Ensure precise measurements and alignment to accommodate the installation of windows and doors at a later stage.

Progression and Staging:

Continue building the walls course by course, maintaining consistent mortar application and block alignment. Periodically verify the vertical and horizontal levels to prevent any deviations that could compromise the structural integrity of the walls.

Completion and Inspection:

Upon reaching the desired wall height, perform a thorough inspection of the entire wall assembly, checking for plumbness, alignment, and overall stability. Address any discrepancies or imperfections before proceeding to the next phase of the construction process.

By meticulously executing these steps and adhering to best practices in wall construction, you establish a robust and resilient framework for your concrete block shed. The walls not only define the enclosure of the structure but also contribute to its strength and durability, setting the stage for the subsequent phases of the project. With the walls in place, the focus shifts to the next critical stage: Installing the Roof.


Step 5: Installing the Roof

The installation of the roof marks a significant milestone in the construction of a concrete block shed, as it not only provides protection from the elements but also contributes to the structural integrity and aesthetic appeal of the structure. The process of installing the roof requires careful planning, precise execution, and attention to detail to ensure a weatherproof and durable covering for the shed. Here's a detailed exploration of the essential steps involved in this crucial phase:

Roof Design and Material Selection:

Begin by finalizing the design and selecting the appropriate roofing materials based on factors such as local climate, shed usage, and aesthetic preferences. Common roofing options for concrete block sheds include asphalt shingles, metal panels, or corrugated sheets. Consider the slope of the roof, drainage requirements, and any additional features such as skylights or ventilation.

Roof Framing and Truss Assembly:

If the shed design incorporates a pitched roof, proceed with framing the roof structure using lumber and assembling roof trusses according to the predetermined dimensions and layout. Ensure that the roof framing complies with local building codes and provides adequate support for the chosen roofing materials.

Roof Sheathing and Underlayment:

Install plywood or oriented strand board (OSB) as roof sheathing over the framed structure, providing a solid base for the roofing materials. Apply a weather-resistant underlayment, such as roofing felt or synthetic underlayment, to create a protective barrier against moisture infiltration and enhance the longevity of the roof.

Roofing Material Installation:

Carefully install the selected roofing materials, following the manufacturer's guidelines and best practices for the specific material. Whether laying asphalt shingles, securing metal panels, or fastening corrugated sheets, ensure proper alignment, fastening, and overlapping to create a watertight and durable roof surface.

Flashing and Edge Detailing:

Incorporate flashing components at roof intersections, valleys, and penetrations to prevent water intrusion and safeguard vulnerable areas. Pay close attention to edge detailing, including the installation of drip edges and fascia boards, to enhance the overall weather resistance and visual appeal of the roof.

Ventilation and Insulation:

If applicable to the shed's usage, consider incorporating ventilation elements such as ridge vents or soffit vents to promote air circulation and prevent moisture buildup in the attic space. Additionally, assess insulation needs to maintain a comfortable interior environment and enhance energy efficiency.

Roofing Inspection and Finishing:

Upon completing the roof installation, conduct a thorough inspection to verify the integrity of the roofing system, including proper fastening, flashing details, and overall weatherproofing. Address any potential issues or deficiencies before proceeding to the final phase of the shed construction.

By meticulously executing these steps and adhering to industry best practices, you establish a reliable and resilient roof structure for your concrete block shed. The installed roof not only safeguards the interior space from environmental elements but also contributes to the overall functionality and visual appeal of the structure. With the roof in place, the focus shifts to the final phase: Adding Finishing Touches.


Step 6: Finishing Touches

As the construction of the concrete block shed nears completion, the focus shifts to the crucial phase of adding finishing touches. This stage encompasses a range of tasks aimed at enhancing the functionality, aesthetics, and overall usability of the shed. From interior fittings to exterior treatments, the finishing touches elevate the shed from a basic structure to a fully functional and visually appealing space.

Interior Finishes

The interior of the shed presents an opportunity to optimize the space for efficient storage and usability. Installing shelving units, storage racks, and organizational systems allows for the seamless organization of tools, equipment, and other items. Additionally, incorporating a workbench or a dedicated workspace tailored to specific hobbies or activities enhances the shed's functionality and versatility.

Door and Window Installation

Completing the installation of doors and windows not only enhances the shed's accessibility and natural lighting but also contributes to its overall aesthetic appeal. Ensure that the doors are properly hung, aligned, and equipped with secure locking mechanisms. Similarly, the installation of windows, if included in the shed design, should prioritize weatherproofing and energy efficiency.

Exterior Treatments

Applying exterior finishes such as paint or sealant not only adds a decorative touch but also provides essential protection against weathering and moisture. Choose high-quality exterior paint or stain that complements the overall design of the shed while offering durability and resistance to the elements. Additionally, consider incorporating trim details and architectural features to enhance the shed's visual impact.

Electrical and Lighting

If the shed will be used as a workshop or storage space for tools and equipment, consider integrating electrical wiring and lighting fixtures. Installing overhead lighting, power outlets, and possibly even a small electrical panel ensures a well-lit and functional workspace. Prioritize safety by adhering to electrical codes and regulations during the installation process.

Landscaping and Surroundings

The area surrounding the shed can be enhanced through thoughtful landscaping and hardscaping elements. Consider adding pathways, gravel or paver surfaces, and landscaping features to integrate the shed seamlessly into its environment. Additionally, incorporating outdoor storage solutions or creating designated areas for waste disposal and recycling contributes to the overall organization and functionality of the outdoor space.

Final Inspection and Clean-Up

Before considering the project complete, conduct a comprehensive inspection of the shed, addressing any remaining tasks or touch-ups. Ensure that all components are securely fastened, surfaces are clean and free of debris, and the overall space is ready for immediate use. A thorough clean-up of the construction site and surrounding areas adds the final polish to the project, leaving behind a tidy and inviting space.

By meticulously attending to these finishing touches, the concrete block shed evolves into a fully realized and functional structure, ready to serve its intended purpose. The attention to detail and thoughtful execution of these final tasks culminate in a space that not only meets practical needs but also reflects the creativity and craftsmanship invested in its construction.



In conclusion, the journey of building a concrete block shed is a testament to the power of DIY construction and the fulfillment that comes with transforming raw materials into a functional and enduring structure. From the initial stages of planning and preparation to the meticulous execution of laying the foundation, building the walls, installing the roof, and adding finishing touches, each phase represents a unique opportunity to blend practicality with creativity.

As the final strokes are applied and the finishing touches are integrated, the concrete block shed emerges as more than just a storage space or workshop. It becomes a tangible expression of craftsmanship, resilience, and personalized utility. The careful consideration given to every aspect, from the choice of materials to the precision of construction, reflects a dedication to quality and a commitment to creating a space that stands the test of time.

Beyond the physical structure, the process of building a concrete block shed fosters a sense of empowerment and accomplishment. It encourages individuals to embrace their innate creativity, problem-solving abilities, and willingness to learn new skills. Each step of the construction journey presents an opportunity to overcome challenges, celebrate small victories, and ultimately witness the transformation of a vision into a tangible reality.

Moreover, the completion of a concrete block shed extends far beyond the confines of the construction site. It signifies the creation of a space where hobbies can flourish, tools can find a home, and ideas can take shape. It becomes a haven for innovation, a sanctuary for craftsmanship, and a reflection of the individuality and resourcefulness of its creator.

As the doors of the newly constructed concrete block shed swing open, they reveal not just a physical space, but a narrative of determination, creativity, and the unwavering spirit of DIY enthusiasts. The shed stands as a testament to the potential that lies within every individual to shape their surroundings, embrace practicality, and infuse their unique touch into the spaces they inhabit.

In essence, the journey of building a concrete block shed transcends the mere act of construction. It embodies the spirit of creativity, the pursuit of functionality, and the celebration of craftsmanship. It stands as a reminder that within every block, every mortar joint, and every finishing touch, there exists an opportunity to craft a space that embodies both practicality and personal expression.

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