Where We Operate

Architectural Design & Planning Services in London and North West

Transforming Homes with Expert Design and Planning

At Arch One, we offer a full range of architectural design and planning services in London, Manchester, Leeds and Leicester, helping homeowners create beautifully designed, functional spaces. With deep expertise in residential projects and a strong understanding of UK planning policy, we guide you from initial concept through to approvals and build-ready plans.

Whether you’re looking to unlock unused space with a loft conversion, extend your kitchen, or carry out a full renovation, our team is here to help bring your vision to life.

Our Residential Design Services Include:

  • Loft Conversions
  • House Extensions
  • Home Renovations
  • Roof Extensions
  • Single Storey Rear Extension
  • Side Extensions

Our Process

At Arch One we follow a clear and collaborative process from concept to construction. Whether you’re reimagining an existing building or developing something entirely new, we’re here to guide you every step of the way.

1. Initial Survey & Information Gathering

We begin by either surveying the site ourselves or working from any existing drawings or documentation you may have. This allows us to understand the property’s context, constraints, and opportunities.

2. Existing Model & Drawing Development

Using the survey data or existing materials, we create an accurate 3D model of the current site or building. We also prepare the necessary drawing sheets to support early design development and the planning process.

3. Proposal Review Meeting

We’ll then meet with you to present and discuss the initial design proposal. This is your opportunity to share feedback, ask questions, and help shape the direction of the project.

4. Design Development

With your input, we refine the proposal to better reflect your vision while responding to planning policy, site conditions, and practical considerations. We ensure the design is coherent, functional, and ready for further development.

5. Design Iterations

Design is an iterative process. We explore and test variations to refine both the aesthetic and functional aspects of the project, making sure everything is resolved before submission.

6. Planning Submission

Once the design is agreed, we prepare and submit the planning application on your behalf. This includes all required drawings, forms, and supporting documentation. We manage the process and monitor progress, keeping you informed throughout.

Post-Planning Stages

Once planning approval is granted, we move into the technical design stages to bring your project closer to construction.

7. Building Regulations

We prepare detailed technical drawings and specifications to ensure your project complies with current UK Building Regulations. These include information on structure, fire safety, insulation, ventilation, drainage, and more. Where needed, we coordinate with structural engineers and other consultants.

8. Tender Documentation

If you’re seeking contractor quotes, we can prepare a full tender package. This typically includes a detailed scope of works, drawings, schedules, and specifications — all the information a contractor needs to price and plan the job accurately.

We can also assist with selecting and appointing a contractor, and reviewing tenders to help you make an informed choice.

9. Construction Drawings

To support the build phase, we produce comprehensive construction drawings that guide contractors on-site. These provide clear and coordinated information, helping to reduce risks, avoid delays, and ensure your project is built as intended.

Every design is tailored to your home, your lifestyle, and your goals. We collaborate closely with trusted contractors and consultants to ensure your project transitions smoothly from planning to construction, with a focus on quality, compliance, and efficiency.

Based in the UK, Arch One is proud to serve homeowners in London, Manchester, Leeds and Leicester, with thoughtful, design-led solutions that maximise space, add value, and elevate everyday living.

Get Planning Permission Right

If you’re unsure what kind of planning permission your project need, or whether you need permission at all, we’re here to help. Book a free initial consultation, and we’ll assess your property, explain your options, and outline the best route forward.

Call us: (0) 203 576 3352
Email: info@arch-one.co.uk
Where we Operate: London, Greater Manchester, Leeds, Leicester