Interior Construction Contractors In London
Oraanj delivers interior construction, refurbishment and fit-out projects for residential and commercial properties across London.
Our focus is on transforming existing interiors, from complete house and apartment refurbishments to offices, restaurants, cafés and other commercial fit-outs.
If your design is already developed, we can review the drawings, specifications and proposed scope and discuss the next stage of construction.
If you still need the interior designed, Oraanj can also provide a complete design and build services from initial concept through to completion.
Send Us the Project Information
Our construction directors work alongside our dedicated interior architecture studio. Every build is executed from precision technical CAD drawings and plans, ensuring total compliance and flawless construction.
If you already have an interior designer, architect or completed design package, you may not need another design service.
You need somebody to understand what has been designed and determine what is required to build it.
Our team can review the available information and discuss whether the project is suitable for Oraanj’s construction and refurbishment service.
By unifying architectural detailing with principal contracting, we operate as a single-point studio providing seamless turnkey interior design for residential and commercial transformations.
Find the Gaps Before Work Begins
A CGI can show what the finished room should look like. It doesn’t necessarily explain how everything should be built.
For business premises, explore our commercial interior design services to align the interior with daily operations.
Before meaningful costing and construction, we identify what must be resolved to protect your programme and budget.
Richmond Luxury Residence Construction
A Family Home Connected to Its Garden
For changes across several rooms, explore our residential interior design services to establish a consistent direction for the home.
This Richmond residential construction centres on a welcoming ground floor with a stronger relationship between the interior and garden. The design brings together sociable kitchen and dining spaces with a quieter living area, pairing muted green tones with walnut finishes and pale stone textures.
Site Challenge & Response
Underpinning & Structural Joist Reinforcement
Installed steel goalposts and sistered existing floor joists to eliminate structural deflection, creating flat subfloors for continuous stone and hardwood floor finishes.
Site Challenge & Response
Managing Tight Suburban Site Access & Deliveries
Coordinated just-in-time material deliveries and off-site pre-assembly to navigate residential parking restrictions and preserve good neighbour relations.
£250,000–£600,000
(Excl. VAT • Mid-to-high specification finishes)
What Construction Work Does Oraanj Undertake?
Comprehensive interior construction, refurbishment and fit-out capabilities across London.
From structural alterations and full strip-outs to made-to-measure joinery, we coordinate every trade required to execute approved drawings with precision.
Scope
Whole-Property Refurbishment
Strip-out, reconfiguration and delivery from initial preparation through to the finished interior.
Explore Refurbishment →
Structure
Internal Alterations
Approved layout changes, partition removals and structural wall alterations with engineering oversight.
Explore Alterations →
Kitchens
Kitchen Installation
Coordination of cabinetry, worktops, appliances, lighting, plumbing and fine finishing works.
Explore Kitchens →
Plumbing
Bathroom Installation
Coordination of sanitaryware, tiling, lighting, concealed valves and specialist plumbing.
Explore Bathrooms →
Finishes
Flooring & Decorating
Installation of hardwood, stone, architectural mouldings, fine decorating and specialist finishes.
Explore Finishes →
Joinery
Bespoke Joinery & Storage
Fitted wardrobes, media walls, cabinetry, panelling and made-to-measure interior elements.
Explore Joinery →
Existing Homes, Reworked for the Way You Want to Live
Our residential construction work focuses on improving and transforming existing properties across London.
From single-room structural transformations to full house refurbishments, we work from approved drawings to deliver high-quality, durable finishes.
Houses
Complete House Refurbishment
Renovation across multiple rooms or an entire property, coordinated from initial strip-out to final handover.
Explore Houses →
Apartments
Apartment Refurbishment
Interior renovation coordinated around building management regulations, lift access and logistics.
Explore Apartments →
Cooking
Kitchen & Living Renovation
Construction and installation around an approved layout, including all service and extraction integration.
Explore Living Spaces →
Heritage
Period Property Refurbishment
Renovation within older buildings where existing architectural mouldings, features and fabric need care.
We coordinate specialist trades including dedicated kitchen renovation and bathroom renovation teams for total finish continuity.
Explore Heritage →
Getting the Space Ready for Business
Commercial construction has another priority: the premises need to work when the doors open.
Oraanj undertakes selected interior refurbishment and commercial fit-out projects where programme reliability and craftsmanship are vital to opening on schedule.
Workplace
Offices & Workplaces
Desking zones, meeting rooms, reception areas, breakout hubs, storage and acoustic partition systems.
Explore Offices →
Hospitality
Restaurants & Dining
Dining areas, bespoke bars, counter units, lighting, flooring and complete front-of-house finishes.
Explore Restaurants →
Food & Beverage
Cafés & Coffee Bars
Barista counters, display joinery, seating layouts, customer circulation and extraction integration.
Explore Cafés →
Retail
Retail & Customer Spaces
Product displays, cash desks, fitting areas, back-of-house storage and high-impact commercial lighting.
Explore Retail →
Specialist commercial requirements (licensing, fire safety, MEP) should be developed and approved before or during the fit-out programme.
We manage structural alterations, listed building approvals, and extensions with end-to-end property renovation services across London.
Before We Price the Works
What Makes a Construction Quote Meaningful?
A quotation is only as useful as the information behind it. If one contractor prices a basic specification and another assumes premium materials, the figures aren’t directly comparable.
Scope
Defined Scope of Works
Exactly what work is included in the project boundaries, what is being stripped out, and what structural elements or existing fabric are retained.
Drawings
Technical Drawings & CAD
Clear floor plans, elevations, lighting plans, electrical circuits, and joinery drawings required for contractors to price and build from.
Spec
Material Specification
Defined selections for sanitaryware, kitchen cabinetry, worktops, flooring types, timber mouldings, paint grades and specialist finishes.
Programme
Site Conditions & Programme
Target handover dates, building management rules, access restrictions, working hours, and procurement lead times for bespoke items.
What Happens Before Construction Starts?
A clear, disciplined 4-stage sequence to eliminate ambiguity before physical works begin.
Project Information & Site Review
Stage 1: Review
We review the property and available design information in detail, conducting a site visit to assess existing structural fabric and access conditions.
Technical Audit & Information Check
Stage 2: Audit
We identify whether critical CAD drawings, MEP layouts, structural engineering calculations or specialist consultant reports are missing.
Scope of Works & Costing
Stage 3: Pricing
The proposed construction and refurbishment requirements are clearly defined, providing the rigorous basis for developing an accurate contractor quotation.
Procurement, Programme & Pre-Start
Stage 4: Launch
Long-lead items are scheduled, building management licences and party wall notices confirmed, and trade sequence aligned before site works commence.
What Happens on Site?
The physical sequence of construction from initial preparation to final handover.
STAGE 1
Preparation, Structure & First Fix
Preparation
Existing interior stripped back per agreed scope.
First-Fix Works
Electrical cabling, plumbing and MEP infrastructure.
Internal Construction
Approved alterations and partition framing.
STAGE 2
Kitchens, Bathrooms & Joinery
Kitchens & Bathrooms
Installation coordinated with services and tiling.
Bespoke Joinery
Fitted cabinetry, wardrobes and bespoke storage.
Flooring & Decorating
Hardwood floors, plastering and fine decorating.
STAGE 3
Fittings, Commissioning & Handover
Lighting & Fittings
Luminaires, switch plates and hardware installed.
Final Installation
Sanitaryware testing, AV commissioning and styling.
Review & Handover
Snagging completed and keys handed over.
The exact sequence varies according to the property and project requirements.
Who Designed Your Project?
Whether your interior was designed by Oraanj or by an external architect, we provide seamless construction execution.
Designed by Oraanj
Keep the Design Connected to the Build
Where Oraanj has designed the project, our construction team works alongside the design and technical specialists responsible for developing your interior. Approved layouts, 3D finishes, lighting schemes and joinery remain tightly coordinated on site.
Designed by Someone Else
We Can Still Review the Construction Project
If another interior designer or architect has completed the design package, send us the available drawings. We can review documentation suitability, provide a transparent contractor quotation and deliver the works with senior director oversight.
Our site engineers coordinate service integration, power drops and architectural lighting design to ensure complete building control compliance.
Navigating London Buildings with Confidence
Apartments and heritage buildings present unique logistical and structural conditions that require seasoned contractor management.
Apartments
Construction in a London Apartment
Apartment refurbishment involves practical requirements beyond the works inside the property:
These items should be established before the project programme is finalised to avoid site delays.
Heritage
Refurbishing a Period Property
Older properties frequently reveal unexpected structural or fabric conditions once opened up:
A sensible programme allows for the fact that not everything is visible before strip-out begins.
Who Is Responsible for What?
Clear Responsibilities Make Construction Easier to Manage
A refurbishment involves several professionals. Clear role allocation ensures complete accountability across design, engineering and site execution.
Interior Designer
Develops concepts, layouts, materials, colours and furniture selection.
Technical Design Team
Produces agreed technical interior drawings, joinery details and lighting plans.
Structural Engineer
Calculates load-bearing wall alterations and structural steel requirements.
Specialist Consultants
Advise on party wall agreements, building control and acoustic testing.
Construction Team
Delivers the physical works on site, coordinating trades, safety and craft.
Project Manager
Coordinates programme milestones, communication, deliveries and procurement.
The exact appointments and responsibilities should be established for each project rather than assumed.
Cost & Timeline Considerations
Understanding the variables that influence construction budgets and programmes in London.
Cost Drivers
How Much Does Interior Construction Cost in London?
There isn’t one meaningful price per square metre for every refurbishment. Costs depend directly on existing condition, structural changes, bespoke joinery and selected material tiers.
Sequencing
How Long Does Interior Construction Take?
A room-by-room update differs significantly from a whole-property transformation involving extensive alterations. Timelines are determined by access, approvals, material lead times and specialist trade sequencing.
Construction, Renovation or Design & Build?
Which Service Do You Actually Need?
Not every client needs the same level of support. Choose the route that best suits your project:
Most Direct Route
Construction & Refurbishment
Your design is substantially developed and you need the physical works delivered accurately from approved drawings, with full trade coordination from strip-out to handover.
Living Spaces
Home Renovation
Your primary objective is to improve or renovate your home, requiring integrated concept design, space planning, kitchen and bathroom specification, and refurbishment.
Turnkey Route
Design & Build
One coordinated route from initial concept and interior architecture through technical CAD drawings, building works, bespoke joinery, and turnkey styling with a single point of overall contact.
All fitted wardrobes, wall panelling, and reception desks are integrated through our in-house bespoke joinery design workshop.
Planning a Construction Project in London?
A successful construction project requires careful planning, coordination and attention to detail from the initial design through to completion. At Oraanj, we bring together interior design, renovation, refurbishment and project coordination to help transform residential and commercial properties into functional, considered spaces.
Some of the questions we’re often asked include:
Whether you’re renovating a home, refurbishing an existing property or transforming a commercial interior, our team can help coordinate the design and delivery process around your property’s requirements.
Book a free consultation today and discuss your construction project with our team.
Frequently Asked Questions
Yes. A contractor can review drawings prepared by another professional and assess whether they contain enough information for pricing and construction. Floor plans alone may not be sufficient. Detailed specifications, structural information, electrical layouts and joinery drawings may also be required before work begins.
A quotation should identify demolition, construction, plumbing, electrical work, materials, finishes, installation, waste removal and site management. It should also clarify VAT, provisional sums, exclusions, specialist fees and responsibility for approvals. Comparing quotations against the same drawings and specifications helps identify differences.
Approval may be required for structural alterations, certain electrical and plumbing works, changes affecting fire safety and other regulated building work. Planning permission is a separate consideration. Requirements depend on the property and proposed alterations, so they should be confirmed with the relevant building control body before construction.
Payment arrangements should be agreed in writing before work begins. Depending on the contract, payments may be linked to defined milestones, completed work or agreed procurement requirements. The contract should explain deposits, variations, payment dates and the final balance, including how outstanding defects will be addressed.
Opening walls or floors can reveal damaged timbers, outdated wiring, leaks or other concealed conditions. The contractor should explain the findings, obtain appropriate specialist advice and provide a cost and programme assessment before additional work is authorised. A contingency allowance helps manage unforeseen expenditure.
Under the Construction (Design and Management) Regulations 2015, contractors and other appointed dutyholders have defined responsibilities. For domestic projects, client duties normally pass to the contractor or principal contractor. Commercial clients retain specific duties, including making suitable project arrangements and appropriate appointments.
Defects should be documented and reported in accordance with the contract. Responsibility depends on the cause, contractual terms and applicable consumer or commercial rights. Before final payment, confirm the snagging procedure, warranties, relevant certificates and how any outstanding work will be completed.
