Plan the Space Properly Before Renovation Begins
Oraanj provides interior architecture and space planning for residential and commercial properties across London.
We help clients work out how an interior should function before the main renovation or fit-out begins — from room layouts and circulation to lighting, electrical positions, bespoke joinery and technical design.
Whether you are reconfiguring a home, renovating an apartment or preparing drawings for your contractor, we can develop the layout and interior information needed to move the project forward.
Before You Choose the Finishes, Get the Layout Right
A beautiful interior will not solve a poorly planned space.
Before deciding on colours, furniture or decorative details, we look at the fundamental questions that shape how you live:
These spatial decisions form the framework for everything that follows.
What Is Interior Architecture?
The Planning Between an Existing Property and the Finished Interior
Interior architecture focuses on how the inside of a property is organised, planned and developed.
It sits between the existing building and the finished interior. Depending on the project, this involves space planning, internal reconfiguration, furniture dimensions, circulation paths, lighting schemes, electrical layouts, kitchens, bathrooms, bespoke joinery, wall elevations, and complete technical drawings.
The aim is simple: resolve important spatial and design decisions before they become urgent, expensive questions during construction.
When Do You Need Interior Architecture?
Spatial planning is most valuable before commitments are made to builders, suppliers, or structural changes.
You’re Changing the Layout
If rooms are being opened up, divided or used differently, the new arrangement must be tested and proven before building begins.
Renovating an Older Property
Period properties often have awkward room proportions, dark corridors, and misplaced bathrooms that need thoughtful replanning.
The Space Doesn’t Work
If you find yourself constantly frustrated by how a home flows, interior architecture identifies the root causes and re-sequences the rooms.
Buying a Property to Renovate
Before committing to a purchase, testing feasible layouts gives you confidence on whether the property can genuinely suit your lifestyle.
Before Appointing Contractors
Accurate drawings allow builders to price like-for-like and construct without mid-project guesswork or expensive variation orders.
Bespoke Joinery & Services
Integrated wardrobes, media units, kitchen runs, and lighting circuits work best when designed into the architecture from the outset.
Start With the Existing Floor Plan
Then Ask What Could Work Better
One of the most valuable parts of interior architecture is testing different ways of using the same floor area.
Imagine an existing ground floor with a separate kitchen, a dining room rarely used, a disconnected living room, limited storage, and awkward circulation. There isn’t automatically one correct answer:
Create a modern, connected kitchen, dining and living arrangement that maximizes natural daylight and social entertaining.
Improve relationship between rooms while retaining quieter, acoustic or formal spaces with pocket doors or crittall screens.
Relocate zones across the property to make superior use of garden access, morning light, and functional daily storage.
We test and compare each option against your lifestyle, structural feasibility, and budget.
What Can We Help You Plan?
Coordinating room layouts, service positions, and bespoke joinery before construction.
Space Planning
Arranging rooms around furniture dimensions, circulation paths, natural daylight, and daily lifestyle.
Layout Restructuring
Testing internal wall alterations, door positions, and broken-plan solutions before demolition starts.
Furniture Planning
Designing around sofas, dining tables, desks, and beds rather than trying to squeeze them in afterwards.
Kitchen & Bathrooms
Aligning sanitaryware and kitchen cabinetry with existing soil stacks, waste runs, and extraction points.
Bespoke Joinery
Designing custom wardrobes, dressing rooms, bookcases, and pocket-door architectural detailing.
Lighting & Electrics
Placing switches, floor boxes, pendants, and recessed tracks in direct harmony with the final furniture plan.
What Drawings Might You Need?
Not Every Project Needs Every Drawing
The appropriate drawing package depends entirely on what is changing.
Depending on the agreed scope, your interior architecture documentation may include existing/proposed floor plans, scaled furniture layouts, wall elevations, lighting and switching layouts, small power positions, bespoke joinery manufacturing drawings, material finishes schedules, and photorealistic 3D visuals.
The Details Need to Work Together
A Few Centimetres Can Matter
Interior architecture resolves the critical spatial relationships that cause frustration when left to site guesswork.
Dining Table + Pendant
The ceiling light must be centered over where the dining table will actually sit, not in the geometric centre of the empty room.
Bedside Sockets + Headboard
Sockets must align perfectly with side-table heights and bed widths rather than hiding awkwardly behind the headboard.
Vanity Basin + Plumbing
First-fix pipework and waste pipes must coordinate with drawer cutouts and wall-hung vanity units before tiling.
Wardrobe Doors + Clearance
Hinged doors require verified swing clearances from bedside tables, pendant drops, and ceiling cornices.
Interior Architecture or Interior Design?
The Difference Is Mainly the Level of Spatial and Technical Detail
In practice, the two disciplines overlap. A substantial renovation needs interior architecture first to organise the space, followed by interior design to elevate the finishes.
Interior Architecture
Spatial Structure
Focuses on how the property functions, internal walls, circulation, CAD technical packs, MEP layouts, and built-in architectural joinery.
✓ Technical Drawings
✓ Joinery Details
✓ Services Coordination
Interior Design & Styling
Finishes & FF&E
Focuses on how the property feels and looks: colour palettes, fabrics, luxury wall coverings, freestanding furniture, and decorative lighting.
✓ FF&E Procurement
✓ Soft Furnishings
✓ Art & Accessories
Interior Architect or Architect?
It Depends on What You’re Changing
An interior architecture project focuses primarily on the internal space and how it is planned.
A registered architect may be required where a project involves broader external architectural changes, planning applications, extensions or structural alterations. Structural changes require a structural engineer.
Oraanj’s role is centered on the interior. Where a wider renovation requires specialist professional input, the relevant appointments can be identified and coordinated as appropriate to the project.
Already Have a Builder?
Give Them More Than Inspiration Images
You can appoint Oraanj for interior architecture without using our construction service.
Depending on the agreed scope, we develop the interior design and technical drawings for you to hand over to your chosen contractor. This is ideal if:
Buying a Property to Renovate?
Test the Interior Before You Commit to the Renovation Plan
If you’re considering a property that needs significant work, space planning reveals its true potential.
Could the kitchen and dining space work better? Can another bathroom or en-suite be created? Is there enough space for built-in wardrobes? Can the ground floor be better connected? Where would furniture realistically fit?
Testing these questions on floor plans before purchasing or commencing structural works protects you from costly mistakes.
How Our Interior Architecture Process Works
A sequenced roadmap from initial consultation through to drawing pack completion.
Consultation
Understanding the property, lifestyle needs, and spatial pain points.
Site Audit
Reviewing measured surveys, building fabric, and fixed service positions.
Space Planning
Exploring multiple layout options and structural flow alternatives.
Preferred Layout
Refining the chosen layout around furniture dimensions and storage.
Interior Design
Developing lighting schemes, bespoke joinery, and material finishes.
Technical Design
Preparing detailed drawings, elevations, and trade specifications.
Drawing Review
Reviewing information in detail with you before final sign-off.
Next Stage
Issue pack to your builder or continue into full Design & Build.
How Much Does Interior Architecture Cost in London?
Fees Depend on Property Scale and Drawing Complexity
A single-room space planning review requires a different level of work from a full London residence.
The investment reflects the extent of layout options, furniture scale testing, wall elevations, technical lighting schedules, small power drawings, bespoke joinery packs, and 3D visualisations.
We establish what your project actually requires before recommending the appropriate design tier. If you have existing floor plans or DWG files, send them with your enquiry for a tailored proposal.
“A beautiful interior will not solve a poorly planned space. Get the layout right first.”
Why Clients Choose Oraanj for Interior Architecture?
Rigorous Technical Planning With Creative Vision
Oraanj has more than 20 years of experience planning high-end residential and commercial interiors across London.
Spatial Expertise
We unlock the hidden floor area of London period homes and apartments through intelligent circulation.
Contractor-Ready Info
Clear, fully dimensioned drawings prevent site delays, costly rebuilds, and contractor guesswork.
Bespoke Millwork
Custom wardrobes and joinery engineered to millimeter accuracy for seamless fabrication.
Design & Build Bridge
Seamless option to transition from technical design into procurement, renovation, and handover.
Planning an Interior Architecture Project?
Interior architecture is about shaping how a space looks, functions and feels from the inside. At Oraanj, we bring together spatial planning, architectural thinking and interior design to create environments that respond to the building, its users and the way the space needs to work.
Whether you’re transforming an existing property, reconfiguring a residential interior, developing a commercial space, or looking to create a more considered relationship between architecture and interiors, our team can help develop the project from the initial concept through to the finished space.
Book a free consultation today and discuss your interior architecture project with our design team.
Frequently Asked Questions
The scope can include spatial planning, layout development, material direction, lighting concepts, interior detailing, bespoke elements and coordination with the wider architectural and design requirements of the project. The exact scope is developed around the property and project objectives.
Yes. We can review an existing property’s layout and explore opportunities to improve circulation, room proportions, connections between spaces, storage and overall functionality. Where appropriate, the design can also consider architectural interventions as part of the wider project.
Where architectural or structural changes form part of an interior project, these can be considered within the overall design approach. Specialist consultants or structural professionals may be required depending on the nature of the proposed work, and these can be coordinated as part of the wider project where required.
Yes. Interior architecture and interior design can be developed together to create a cohesive result. Spatial planning, architectural details, materials, lighting, furniture, joinery and finishes can all be considered as part of one overall design direction.
Yes. Bespoke elements can include built-in storage, cabinetry, doors, screens, shelving, stair details, feature walls and other made-to-measure elements. These can be developed to respond to the architecture and proportions of the space.
Lighting is an important part of shaping an interior environment. We consider natural light, artificial lighting, architectural features, circulation and the atmosphere of individual spaces when developing the overall design approach.
Our interior architecture approach can be applied to a range of residential and commercial projects, including home transformations, apartment interiors, period properties, hospitality spaces, workplaces and other environments where spatial planning and interior architecture play an important role.
Yes. Existing architectural features can be incorporated into the design where they contribute to the character and functionality of the space. The design can explore how original architectural elements, new interventions, materials and contemporary details can work together.
Oraanj brings together spatial thinking, interior design and practical project coordination to create interiors that respond to both the architecture and the people using the space. We consider the relationship between layout, proportion, materials, lighting, detailing and functionality throughout the design process.
