Extensions & Garden Rooms

Home Extensions & Garden Rooms in Dundee and across Scotland.

House Extensions & Garden Rooms across Scotland.

At 125Architects, we create bespoke home extensions and garden rooms across Scotland that bring light, space and style to your home. Whether you’re looking to expand your kitchen, add a bright living area, or create a versatile garden room, we deliver modern, tailored designs to suit your lifestyle.

Bespoke Extensions.

Our home extensions feel like a natural part of your property while adding space, comfort and value. From single-storey side extensions to two-storey additions and comprehensive whole house renovations, we help manage every stage of your project.

Garden rooms that inspire.

A garden room can be a peaceful retreat, home office, gym, or creative studio. We design spaces that are:

  • Light-filled – maximising natural daylight

  • Flexible – layouts to suit your needs

  • Integrated with your garden – seamless indoor-outdoor connection

From small garden studios to multi-functional garden rooms, we deliver bespoke solutions across Scotland.

Costs & Fees.

Every project is unique, so costs vary from one project to the next. We provide:

  • Transparent architect fees – tailored to project size and complexity and offered on a lump sum basis.

  • Realistic construction budgets – based on our experience delivering extensions and garden rooms across Scotland.

  • Value for money – designs that enhance your home’s functionality and long-term value whilst improving the quality of every day life.

We start with a free initial consultation to discuss your vision and give a clear guide to each step of the process.

How we deliver your extension or garden room.

We aim to support you at every stage, making the process clear, efficient and stress-free:

  • Briefing & Surveys – Understanding your needs, lifestyle, and aspirations. Detailed site surveys give us a solid foundation for design.

  • Design & Planning – Bespoke designs that maximise light, space, and functionality, tailored to your home.

  • Planning Approvals – We manage all planning applications and consultations, securing permissions smoothly.

  • Building Warrant, Tendering & Contractor Appointment – Post-approval, we manage building warrant submissions, tender documentation, and contractor selection.

  • Contract Administration – Quality assured from start to finish, using Standard Forms of Building Contract for Homeowners, to ensure every detail meets your expectations.

Whether you’re searching for an architect for home extensions in Scotland or a designer for a modern garden room, we provide a complete service that guides you from concept to completion.

You can read further information about how to ‘brief your architect’ and ‘how long it takes to design a home extension’ in our blog.

Why Choose 125Architects?

We are a multi-award-winning, RIAS Conservation Accredited practice from Dundee, offering:

  • Bespoke, modern designs for extensions and garden rooms.

  • Hands-on guidance from concept to completion.

  • Solutions that suit your home, lifestyle and budget.

Related Information | Dundee Architects

Get in touch | Architects in Dundee

Ready to transform your home?

Contact 125Architects today to discuss your home extension or garden room — we work with homeowners throughout Scotland to deliver thoughtful, modern architecture.

Start a conversation.