The Design and Build Company London
A successful property transformation starts with structural clarity and practical planning long before physical construction begins. At Oraanj, we provide a fully integrated design and build service that brings architectural planning, trade coordination, and interior design in London together under one roof. Our process simplifies your entire build, turning spatial concepts into beautifully finished, structurally sound spaces.
As an established interior design company, we believe that structural architecture and interior finishes must work in harmony. Whether you are undertaking a Victorian terrace renovation, a modern house extension, or a complete property layout reconfiguration, our team manages every stage of the build with complete transparency, protecting both your timeline and your peace of mind.
Our Design And Build, London Services
We provide end-to-end design and build services across London, specialising in leasehold refurbishments, conservation properties, family homes, apartments, commercial spaces, and renovation-led interior design projects.
Architecture Design
- Planning & Permissions: Support for local authority planning approvals, rear extensions, and basement dig-outs.
- Heritage & Conservation: Architectural interior design for conservation area planning, Listed Building Consent, and heritage-sensitive detailing.
- Building Compliance: Permitted Development assessments, Building Regulations approval, and Article 4 compliance where applicable.
Space Planning
- Layout Reconfiguration: Whole-house layout reconfiguration and open-plan kitchen and living transformations.
- Spatial Optimisation: Compact flat redesign, layout optimisation, and loft conversions with spatial reconfiguration.
- Smart Storage: Storage-led design strategies for long-term family home transformations.
Interior Design & Styling
- Luxury & Heritage: Luxury interior design projects, mansion block apartment upgrades, and pied-à-terre refurbishments for overseas owners.
- Residential Finishing: Home decorating services, interior styling, and finishing for residential properties.
- Commercial & Investment: Commercial interior design for businesses and interior design services for London property investors.
3D Renders & Design
- Residential & Commercial Design: Luxury interior design for homes and commercial interior design for offices, hospitality, and growing businesses.
- Interior Redesign: Interior redesign and refurbishment for mansion block apartments, pied-à-terres, and mixed-use residential developments.
- Styling & Finishing: Home styling, interior finishing, and architectural interior design services for residential properties.
Procurement & Joinery
- Custom Cabinetry: Bespoke joinery for long-term family home upgrades.
- Furniture & Fittings: Custom furniture design tailored to specific property requirements.
- Material Sourcing: Coordinating finishes for kitchen renovations and developer-spec apartment upgrades.
Design And Build
- Implementation & Construction: Coordination with home builders where implementation support is required.
- Project Management: Managing property renovation planning, including basement dig-outs and structural upgrades.
- Site Coordination: Handling build-ready documentation, Party Wall coordination, and structural engineer coordination.
How does Design and Build Work?
Step 1: Initial Consultation, Design & Space Planning
Every successful design and build project begins with a detailed consultation where we take the time to understand your vision, lifestyle, budget, and goals. Our architects assess your property, discuss your ideas, and explore the best ways to maximise its potential while considering factors such as space planning, natural light, structural limitations, and functionality. This stage allows us to establish a clear design direction before any architectural work begins, creating a strong foundation for the rest of the project.
What this stage includes:
- In-depth discussion about your vision, lifestyle, and project objectives.
- Comprehensive property inspection and feasibility assessment.
- Initial budget guidance and expected project timeline.
- Advice on planning permission and Party Wall requirements.
Step 2: Architectural Design & Concept Development
With a clear understanding of your requirements, our architects begin transforming your ideas into a practical and visually inspiring design. This stage focuses on interior architecture and creating layouts that improve how you live or work while making the best use of your available space. We carefully consider room proportions, natural light, circulation, storage solutions, and the overall flow of the property, using detailed 3D drawings to develop a design that is both functional and aesthetically refined.
What this stage includes:
- Architectural floor plans and space planning.
- Concept development tailored to your lifestyle.
- 3D visualisations and design presentations.
- Natural light and circulation planning.
- Layout optimisation and storage solutions.
Working closely with you throughout the process, we refine concepts, explore alternative layouts where appropriate, and ensure every detail aligns with your vision before progressing to technical CAD drawings. Because our architects collaborate with our construction specialists from the outset, every design is developed with buildability, efficiency, and long-term value in mind, helping reduce revisions and creating a smoother transition into the next stage of your project.
Step 3: 3D Renders, Design Review & Client Approval
Once the architectural layout has been finalised, we bring your vision to life through detailed 3D design renders and presentations. These realistic visuals allow you to experience the space before construction begins, making it easier to understand layouts, proportions, materials, lighting design, and overall aesthetics. This collaborative stage ensures every detail aligns with your expectations before moving into technical approvals.
What this stage includes:
- High-quality 3D visualisations.
- Review of floor plans and architectural layouts.
- Detailed design presentation and walkthrough.
- Material, colour, and finish selection.
- Lighting and bespoke joinery review.
- Final design approval before technical documentation.
Once you’re completely satisfied, we incorporate any final revisions and prepare the approved design for planning, structural engineering, and construction documentation. This process ensures everyone is working from the same vision, helping minimise changes, delays, and unexpected costs during the build.
Step 4: Planning Permission & Structural Engineering
- Planning permission applications (where required).
- Building Regulations documentation.
- Structural engineering calculations.
- Load-bearing wall and steel beam design.
- Coordination with local authorities.
By handling planning, engineering, and approvals in-house, we streamline the process, reduce delays, and ensure your project is fully prepared for the construction phase.
Step 5: Material Procurement & Bespoke Joinery
With all designs and technical approvals complete, we begin preparing your project for construction by coordinating procurement and bespoke joinery. Our team carefully manages the procurement of high-quality materials, finishes, fixtures, and fittings while working with trusted suppliers to ensure everything meets the design specifications. At the same time, our bespoke joinery process includes detailed drawings for custom furniture, cabinetry, wardrobes, kitchens, and storage solutions, ensuring every element is manufactured with precision before installation begins.
What this stage includes:
- Material and finish procurement.
- Bespoke joinery design and detailing.
- Kitchen, wardrobe, and cabinetry planning.
- Supplier and manufacturer coordination.
- Quality checks and production scheduling.
Finally: Construction & Project Delivery
With every detail planned and approved, construction begins under the supervision of our experienced design and build team. From structural works to bespoke finishes, we manage every aspect of the project while coordinating architects, engineers, project managers, and skilled trades to ensure a smooth and efficient build. Our integrated approach keeps communication clear, maintains quality throughout every stage, and delivers your project on time and to the highest standards.
What this stage includes:
- End-to-end project management.
- Coordination of all trades and suppliers.
- Regular site inspections and quality checks.
- Client updates throughout the build.
- Installation of bespoke finishes and joinery.
By managing everything under one roof, we ensure your completed space reflects the original design vision while delivering exceptional craftsmanship, functionality, and lasting quality.
Common Questions Clients Actually Ask Before Starting
Q. Do I need planning permission for my London extension?
Q. How do you prevent building costs from spiralling?
Q. Will I need a separate structural engineer and builder?
Q. How does interior architecture differ from standard building?
Q. Do you manage UK building control approvals?
Experience Delivering Across London
Our portfolio includes residential interiors, commercial interior design projects projects, office interior design work, and projects for overseas property owners across prime and high-demand areas. We support clients looking for interior designers near me, interior design for London property investors, or a team able to coordinate design, technical planning, procurement, and delivery.
West London
Kensington and Chelsea • Chelsea • Knightsbridge • Holland Park • Notting Hill • Fulham • Richmond upon Thames • Chiswick • Hammersmith
North London
Hampstead • Highgate • Islington • Muswell Hill • Barnet • Totteridge • Mill Hill • Finchley
East London
Canary Wharf • Shoreditch • Hackney • Stratford • Whitechapel
South London
Wimbledon Village • Dulwich Estate • Putney • Battersea • Greenwich • Clapham
Central London
Mayfair • Belgravia • Marylebone • Westminster • St James’s • Fitzrovia • Covent Garden • Bloomsbury • Barbican • London Bridge
Commercial Design And Build Services
Transforming a business property requires coordinating structural updates, layout efficiency, and brand identity with minimal operational downtime. At Oraanj, we deliver commercial design and build solutions, guiding retail shops, corporate offices, and hospitality settings from spatial layout to physical fit-out. Our commercial solutions focus on:
- Efficient Space Planning: Creating layouts that optimise staff workflow, customer movement, and back-of-house storage.
- Brand-Driven Fit-outs: Building environments that represent your corporate visual standards and business objectives.
- Specialist Commercial Layouts: Utilising our experience as a commercial interior designer to ensure compliance with trade rules, fire routes, and accessibility standards.
- Strategic Retail Spaces: Installing customised lighting, shelving, and checkout counters designed by an experienced shop interior designer to enhance customer interactions.
From initial space layouts to final building sign-offs, we construct environments that balance trade compliance, customer appeal, and daily business usability.
Planning a Design & Build Project in London?
Planning a major property refurbishment, layout reconfiguration, or a complete design-led construction project in London?
Most clients come to us with questions around contractor coordination, build sequencing, costs, and how to bridge the gap between design and delivery.
- How do we ensure the original design intent is perfectly executed on site?
- What budget is realistically required for both technical planning and construction?
- How do we manage contractors, trades, and supplier lead times without delays?
- What technical drawings and specifications must be finalised before construction begins?
Frequently Asked Questions
We can provide a broad cost range, but an accurate, legally binding construction quote requires detailed architectural plans, structural engineering calculations, and clear finishes. Estimates based purely on assumptions almost always lead to unexpected structural expenses once the work begins.
Our complete services handle architectural spatial planning, building permit submissions (where needed), interior architecture, technical CAD drawings, structural build execution, trade supervision, and final interior fit-outs.
Yes. As a comprehensive design and build company, we supervise the entire building site, coordinating all independent trades, delivery schedules, and structural phases to ensure everything matches our technical layouts.
Timelines vary according to project size and scale. A minor internal layout change might take a couple of months, whereas deep property renovations or structural extensions involve local authority planning, ground structural works, and longer lead times.
Value engineering means analysing your building’s architectural drawings and specified materials to suggest practical, cost-saving alternatives that preserve the structural safety and creative intent of your space.
Yes. Alongside our residential projects, we act as specialised commercial interior designers and project managers to execute fully compliant, functional commercial fit-outs.
