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Architectural Excellence Tailored to Your Vision

De Simone Designs | Architectural Plans & Consulting

Specializing in Custom Home & Cottage design, Additions & Renovations, and Multi-Unit Homes. Other areas of expertise include Development & Lot Planning, Variances & Rezoning, Residential & Commercial Design. 

De Simone Design Architectural Design Services

At De Simone Designs, we transform ideas into spaces that inspire. Specializing in custom homes, cottages, multi-unit residences, and commercial design, our services are built on client-centered values, design precision, and a commitment to quality. From initial planning to permit-ready plans, we handle every detail, making your vision a reality.

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1. Custom Homes & Cottages

Tailored designs that reflect your unique style and needs, with a seamless approach from initial concept to permit-ready plans.

2. Additions & Renovations

Whether you're expanding your home or transforming an existing space, we create additions and renovations that enhance functionality and flow, while blending seamlessly with the original design.

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3. Multi-Unit Homes

From duplexes to stacked townhomes, we provide practical, beautiful solutions for multi-family living, emphasizing design integrity and efficient space planning.

4. Development & Lot Planning

Our team navigates zoning, variances, and rezoning requirements to maximize the potential of your property, ensuring compliance and long-term value.

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5. Commercial Design

Purposeful, brand-aligned spaces that meet business needs, from offices to restaurants and retail environments.

Custom Home Design

We worked with Thomas for our custom cottage project. His creativity, thought-out plans and dedication to creating a great design truly exceeded our expectations. From the initial consultation to the final result, Thomas was professional, knowledgeable, and truly passionate about his work. He listened to our ideas and brought them to life. If you are looking for an architectural design firm that will go above and beyond to create your dream space, look no further than De Simone Designs. Thank you for making my dream summer cottage a reality!  

                         

C & J Keast – Crystal Beach, ON

De Simone Designs Portfolio

Explore our portfolio to see the artistry and expertise behind each De Simone Designs project. From custom homes and cozy cottages to sophisticated commercial spaces, each design reflects our dedication to quality, functionality, and client vision. Every project tells a unique story, crafted with care, precision, and a commitment to excellence. Dive in and discover the possibilities for your next project.

Rear Addition - Chippewa/Niagara Falls Living Room, Kitchen & Master Bedroom Expansion

Rear Addition - 

Niagara-on-the-Lake

Sunroom Addition (Phase 1 of 2)

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​Townhouses - Port Colborne

Multi-Generational Townhouse Units

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Semi-Detached - Welland

1,800sf units proposed for planned development

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Large Addition - Welland

New Living, Dining, Kitchen and Master Bedroom Suite addition to this existing side-split

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Large Addition - Welland

New Living, Dining, Kitchen and Master Bedroom Suite addition to this existing side-split

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Book a Consultation With De Simone Designs

About De Simone Design

De Simone Designs, led by Principal Designer and Architectural Technologist Thomas De Simone, brings over 16 years of industry expertise to each project. From custom homes and cottages to complex commercial builds, Thomas combines a deep understanding of construction practices with a refined design sense to create spaces that exceed client expectations. With a commitment to client satisfaction, meticulous attention to detail, and adherence to Ontario Building Code (OBC) standards, De Simone Designs ensures each project is both beautiful and compliant.

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  • What services do you offer?
    At De Simone Designs, we specialize in a variety of architectural services, including custom home design, multi-unit dwellings, renovations, additions, and commercial design. We also provide consulting on zoning, variances, and permit processes, ensuring your project complies with all local regulations.
  • What sets De Simone Designs apart from other architectural firms?
    At De Simone Designs, we pride ourselves on offering personalized service, working closely with each client to bring their vision to life. Our team’s extensive experience in both residential and commercial design, along with our expertise in navigating the complexities of permits, zoning, and regulations, ensures that every project is completed to the highest standards. We’re committed to creating functional, beautiful spaces that meet your specific needs.
  • How long does it take to design a custom home?
    The timeline for designing a custom home varies based on the complexity of the project. Generally, it takes between 2 to 6 months for the design phase, depending on factors such as permits, approvals, and revisions. We’ll work with you to develop a clear schedule and keep you informed throughout the process.
  • Can you help me design a multi-generational or custom multi-unit home?
    Yes! We specialize in designing multi-generational homes and multi-unit dwellings. Whether you're planning a duplex, townhouse, or a home with separate living spaces, we’ll help you design a layout that offers privacy, functionality, and comfort for all family members. Our expertise includes zoning, development planning, and ensuring that your project is both practical and meets local regulations.
  • What should I bring to the first consultation?
    For your initial consultation, it’s helpful to bring any ideas, sketches, or inspiration you have. A vision board, photos of homes you like, or a list of your must-have features can be great starting points. We’ll also discuss your budget and timeline, as these are key factors in shaping your design.
  • Can you work with my contractor?
    Absolutely! We collaborate closely with contractors to ensure that your design is implemented to the highest standard. Our team works seamlessly with your chosen contractor to ensure your vision is realized within your budget and timeline.
  • Do you help with permits and zoning issues?
    Yes, we handle all aspects of the permit and zoning process. Our team is experienced in managing zoning reviews, variances, rezoning, and other municipal requirements, making sure your project adheres to all local regulations and guidelines.
  • What is the cost of designing a custom home?
    The cost of designing a custom home depends on the scope of the project, the size of the home, and any specialized features you want to incorporate. During your consultation, we’ll provide an estimate based on your unique needs and budget, and we’ll work with you to ensure the design aligns with your financial goals.
  • How do I start the process of designing my custom home?
    The first step is to schedule a consultation with us, where we’ll discuss your vision, budget, and any specific requirements. From there, we’ll help guide you through the design process, including conceptual planning, drafting designs, and obtaining permits. Our team works closely with engineers, contractors, and municipal departments to ensure a smooth process.
  • Do you offer renovation and addition services?
    Yes, we specialize in home renovations and additions. Whether you’re looking to expand your living space, update a kitchen or bathroom, or add an extra room, we’ll ensure that the new design seamlessly integrates with your existing home. We handle all aspects of the renovation process, from design to permits and contractor coordination.
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Let's Work Together

Send us a message, and we will contact you to arrange a free consultation:

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