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Bespoke Architectural Design Services in London
Plot Architecture is a small, design-led practice dedicated to creating bespoke, buildable architecture tailored to each client's unique needs. With a collaborative approach, we specialise in residential and commercial projects across London and the home counties, offering comprehensive services from initial concept to project completion. Our directors, Mollie Allen and Oliver PG Sims, bring extensive experience in architectural design, interior detailing, and contract administration, ensuring projects meet both client aspirations and regulatory standards.

We prioritise hands-on involvement, transparent communication, and innovative solutions, with a proven track record in securing planning permissions for complex schemes, including listed buildings and conservation areas. Our commitment to quality is reflected in our high referral rate and partnerships with developers, architects, and trade professionals.
Services
Residential Architecture Commercial Projects Interior Design Planning Applications Extension Design
Highlights and features
  • We provide hands-on director involvement throughout every project.
  • Our designs are tailored to client needs and local context.
  • We have extensive experience securing planning permissions in London and conservation areas.
  • We offer comprehensive services from concept to construction completion.
  • Our high referral rate reflects our commitment to quality and client satisfaction.
What people say
Attentive to budget Professional and attentive Knowledgeable and professional Successful planning approval Transformed home
Services
Residential Architecture
We specialise in creating bespoke residential architecture, including new builds, extensions, and renovations. Our approach focuses on client needs, combining functionality with aesthetic appeal while adhering to planning regulations. Projects range from modernising period properties to designing contemporary family homes.
Commercial Projects
Our commercial architecture services cater to diverse sectors, delivering innovative spaces that balance practicality and style. We work closely with clients to develop schemes that meet business requirements, whether refurbishing existing premises or constructing new facilities, ensuring compliance with all regulatory standards.
Interior Design
We offer comprehensive interior design services, tailoring spaces to reflect client lifestyles and preferences. From kitchen layouts to full-house renovations, our designs prioritise usability, material selection, and lighting, ensuring cohesive integration with architectural elements and building regulations.
Planning Applications
Securing planning permission is a critical phase we manage with expertise. We prepare detailed submissions for London boroughs and nationwide, including listed buildings and conservation areas. Our track record includes first-time approvals for complex, ambitious designs.
Extension Design
We design functional and visually harmonious extensions that enhance property value and usability. Our process involves assessing structural feasibility, creating detailed plans, and navigating planning requirements to deliver spaces that seamlessly integrate with existing structures.
People
Mollie Allen
Director
Mollie Allen co-founded PLOT with a focus on architectural design and interior detailing. She leads project tendering and contract administration, ensuring client visions are realised with precision and quality.
Oliver PG Sims
Director
Oliver PG Sims co-founded PLOT and oversees architectural design and technical detailing. With experience at award-winning practices, he ensures every project meets rigorous design and construction standards.
Questions
What services does PLOT Architecture + Design offer?
We provide architectural design, interior design, planning applications, and technical construction drawings for residential and commercial projects.
Do you work outside London?
While based in London, we work across the UK and globally, with projects in Surrey, Ealing, and beyond.
How do you handle planning permissions?
We prepare detailed planning submissions, leveraging experience in London boroughs and conservation areas to secure approvals efficiently.
Can you assist with commercial projects?
Yes, we deliver bespoke commercial architecture, including refurbishments and new builds, tailored to business needs.
What is your design philosophy?
We prioritise client collaboration, creating bespoke designs that reflect individual needs while respecting local context and building regulations.
How are projects managed from start to finish?
We guide projects through concept, planning, tendering, and construction, with directors directly involved at every stage for quality control.