Interior Design Services in London | Residential & Commercial Interior Solutions
Architectural Design & Interior Design Services in London
At AY Planning & Construction Consultants, we provide expert architectural design and interior design services for residential and commercial clients across London and Greater London. Our qualified team brings together planning knowledge, technical design expertise, and creative vision to deliver spaces that are beautiful, functional, and fully compliant with UK planning and building regulations.
Whether you are extending your home, converting a loft, redesigning a commercial interior, or developing a new build property, our architectural team will guide you from initial concept through to planning submission and technical design.
Residential Architectural Design
We design for the full range of residential project types, helping homeowners and developers unlock the potential of their properties across all London boroughs.
Our residential design services cover:
• House extensions — single storey, double storey and wraparound
• Loft conversions and mansard roof extensions
• Garage conversions and basement developments
• New build houses and infill developments
• HMO and multi-unit residential conversions
• Flat conversions and change of use schemes
Every design is developed with planning policy in mind, ensuring that creative ambitions are balanced with practical compliance from the very beginning. This reduces the risk of planning refusals and helps ensure a smooth journey from design to approval.
Commercial Architectural Design
We work with commercial clients, landlords, and investors on a range of commercial design projects, including office fit-outs, retail units, hospitality spaces, and mixed-use developments.
Our commercial design service includes:
• Office and workspace design
• Retail and hospitality fit-outs
• Change of use and conversion schemes
• Mixed-use development design
• Commercial extensions and refurbishments
We understand the importance of commercial viability, programme certainty, and regulatory compliance in commercial projects, and our design approach reflects this from day one.
Interior Design Services
Our interior design service is available as a standalone offering or as an integrated part of a wider architectural and planning project. We help clients create interiors that are well-planned, aesthetically refined, and practical for everyday use.
Interior design services include:
• Space planning and layout design
• Material and finish specifications
• Kitchen and bathroom design
• Lighting design and specification
• Built-in furniture and joinery design
• Coordination with contractors during fit-out
Our interior design approach is rooted in understanding how spaces will actually be used, ensuring that design decisions support lifestyle, workflow, and long-term functionality.
From Concept to Planning Approval
One of the key advantages of working with AY Planning & Construction Consultants is our integrated approach. Because our team has deep expertise in both architectural design and planning applications, we design with planning approval in mind from the very start.
This means fewer surprises, fewer revisions, and a significantly higher likelihood of planning success. Our approximate 90% planning application success rate across 200+ completed projects reflects this joined-up approach.
Our design process typically follows these stages:
• Initial consultation and design brief
• Site survey and measured drawings
• Concept design and options
• Planning drawings and submission
• Building regulation technical drawings
• Construction coordination and site support
Why Choose AY Planning & Construction Consultants
Clients choose us because we offer a rare combination of architectural creativity, planning expertise, and construction knowledge within a single, personal practice.
Unlike larger corporate firms, we provide direct access to senior consultants on every project, ensuring that the people you speak to are the people actually doing the work. We are a small, focused practice that prioritises quality, responsiveness, and results.
• Qualified architectural technician-led practice
• 200+ completed projects across London
• ~90% planning application success rate
• Integrated planning and design service
• 30 years of combined team experience
• Free initial consultation
Contact us today to discuss your project and find out how our architectural design team can help you create something exceptional.
Our Interior Design Packages
Our Standard Interior Design Package is focused on clear and practical space planning. It includes detailed 2D layouts and furniture positioning to help clients understand how their space will function and flow. This package is often used at the early stage of a project where clarity of layout is the main priority before progressing into detailed design or construction.
The Silver Interior Design Package builds on this foundation and introduces a much more developed design approach. Alongside refined spatial layouts, it includes material and finish specifications, kitchen and bathroom design direction, lighting considerations and 3D visualisations. This package is ideal for clients who want a clear visual understanding of their finished space along with a fully developed design scheme that can be taken forward into construction.
Our Gold Interior Design Package provides a complete turnkey interior design and delivery solution. This is our most comprehensive service and is designed for clients who want a fully managed process from concept through to completion. It includes full interior design development, detailed specifications, material sourcing support, coordination with project management services, and integration with site inspections and quality control. The Gold service is particularly suited to high-end residential projects and developers who require a seamless, managed delivery with minimal client involvement during construction.