Transforming Homes & Heritage Spaces

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OGA are chartered architects specialising in residential and hospitality projects across the UK. From contemporary home extensions to the restoration of listed buildings, we combine elegance with technical precision. Whether it’s reimagining a period property or crafting a modern new build, our team delivers architecture to respect and elevate.

Work With Architects Trusted by Homeowners, Developers & Planners

  • Fletcher Court

  • Finsbury Park

  • Langbourne Mansions

  • Crouch End

  • Chelsea

  • Sharps Barber & Shop

See Our Portfolio

Concept to Completion

Every project at OGA begins with a conversation to understand site, client and ambition.

From there, our process combines creativity, technical precision, and regulatory expertise.

  • Every design begins with dialogue. We assess your property, goals, and other constraints to establish a clear brief.

  • Ideas take form through sketches, 3D visuals and feasibility studies that balance aesthetics, practicality, and budget.

  • We coordinate with other professionals to produce drawings and documentation to support smooth approval with local authorities, including listed-building consent where required.

  • Once approved, OGA develops construction-ready documents and coordinates with engineers, builders, and craftspeople to bring the design to life.

  • We oversee the construction process, monitoring quality, cost and timeline, to ensure all expectations are met.

Expertise

  • Home Extensions

    The art of thoughtful expansion. Our architects specialise in sensitive home extensions that respect your property’s original character.

  • Heritage Spaces

    Preserving the soul. We navigate complex heritage conservation regulations to breathe new life into period properties.

  • Loft Conversions

    Elevated living. Transform your underutilised loft into a light-filled primary suite or home office that maximises every inch of headroom.

  • New Build Homes

    Visionary architecture, from the ground up. We navigate planning complexities to deliver high-performance designs for comfort and character.

  • Hospitality Spaces

    The architecture of atmosphere. We create immersive spaces that balance high-functioning operational flows with unforgettable guest experiences.

  • Home Renovations

    Curated interiors. Crafted for life. We integrate architecture with high-end interior design to deliver cohesive home renovations that flow seamlessly.

Chartered, Registered, and Trusted

Architecture demands accountability. Chartered practice OGA operates to the highest professional standards, with senior members who are both RIBA members and chartered with the Architects Registration Board (ARB).

Frequently Asked Questions

  • No, however working with a chartered architect ensures your extension meets building regulations, complements your home, and gains planning approval efficiently. OGA provides full support from concept to completion.

  • Absolutely. Our team specialises in complex planning environments, often in heritage contexts, to deliver residential and hospitality work, managing all required documentation and communication with local planning authorities.

  • Whilst focused on the South East of England, OGA works with clients across the UK. From London & Kent to Oxfordshire and beyond.

  • Costs depend on project size, scope, and complexity. OGA offers transparent, staged pricing, from initial concept to full design and build.

  • Yes. OGA has expertise in achieving listed building consent and in designing in conservation areas, ensuring any restoration or alteration meets heritage regulations while enhancing the building’s significance and character.