From Ideas, To Reality
House Extensions London
High-Quality House Extensions Built Around Your Home
At RF Trojan Ltd, we build high-quality house extensions for homeowners across London. Whether you are looking for additional kitchen and dining space, a larger living area, an extra bedroom or more practical space for your family, a well-designed extension can transform the way you use your home.
As an experienced London building contractor, we undertake single-storey extensions, double-storey extensions and other residential extension projects, working from your architectural and structural drawings to deliver the construction work to a high standard.
Every property and project is different. Our approach is therefore focused on understanding your requirements, working carefully with the project information provided and delivering a finished extension that integrates naturally with the existing property.
From the initial construction works through to completion, we focus on quality workmanship, reliable project management, clear communication and suitable materials to help ensure your extension is built properly and with attention to detail.
40+ Years of Experience
Fully Insured
Free Site Surveys
Building Regulations Compliant
Residential & Commercial Projects
60-MONTH WARRANTY ON EXTENSIONS
Contact Us
At RF Trojan, we are always ready to discuss your construction needs. Whether you're planning a new build, renovation, extension, or structural work, our expert team is here to provide advice and professional solutions.
Info@rftrojanltd.com
Tel: 020 8793 3503
Mob: 07568 589888
Alternatively, fill out our online contact form, and a member of our team will get back to you as soon as possible.
Let’s build something great together—get in touch today!
Why Choose RF Trojan Ltd for Your Extension?
Experienced London Building Contractor
RF Trojan Ltd has extensive experience in residential construction and refurbishment projects across London. We understand the practical challenges that can come with extending existing properties, particularly in established residential areas where access, neighbouring properties and the existing structure need to be carefully considered.
Skilled Workmanship
A successful house extension depends on good workmanship at every stage of construction. Our team works across the key building trades involved in extension projects, with attention given to structural work, brickwork, roofing, insulation, plastering, finishes and the connection between the new and existing parts of the property.
Extensions Built to Your Project Requirements
We understand that homeowners have different priorities. Whether your main objective is creating an open-plan kitchen, adding living space, increasing bedroom space or making better use of your property, we build according to the agreed project requirements and architectural and structural information.
Quality Materials
We use appropriate, quality materials selected for the requirements of each project. Particular attention is given to areas such as insulation, structural elements, roofing, external finishes and the integration of the new extension with the existing building.
Clear Communication
Building work can be a significant investment, so we believe communication should remain straightforward throughout the project. We keep clients informed about the progress of the works and aim to provide a professional and organised building service from start to finish.
A Complete Building Service
RF Trojan Ltd can undertake the main construction works required for residential extensions, coordinating the different stages of the build to help move your project from drawings to a completed extension.
Our House Extension Services
Single-Storey Extensions
A single-storey house extension can be an effective way to increase the usable space on the ground floor without significantly changing the layout of the rest of your property.
We build single-storey extensions for a range of purposes, including:
Kitchen and dining extensions
Rear house extensions
Side return extensions
Living room extensions
Open-plan living spaces
Larger family rooms
Utility and additional storage areas
We work carefully around the existing building to create a practical connection between the original property and the new extension.
Double-Storey Extensions
A double-storey extension can provide substantially more additional floor space by extending the property across two levels.
Depending on the design, a double-storey extension can provide additional kitchen, dining or living space downstairs while creating extra bedrooms, bathrooms or other rooms above.
RF Trojan Ltd undertakes the construction of double-storey residential extensions in accordance with the project's architectural and structural requirements.
Rear Extensions
Rear extensions are a popular option for homeowners looking to increase the size of their kitchen, dining or living areas.
We construct rear extensions designed to integrate with the existing property, including the necessary structural, roofing, brickwork, insulation and internal building works.
Side Return Extensions
A side return extension can make better use of the often-unused space alongside a property, particularly on Victorian and period homes.
We undertake the construction of side return extensions, including structural alterations and the necessary building works to connect the new space with the existing property.
Kitchen Extensions
Creating a larger kitchen and dining area is one of the most common reasons homeowners choose to extend their property.
A kitchen extension can provide additional floor space for cooking, dining and entertaining while creating a more practical layout for everyday living.
We undertake the building and structural works required to create the additional space, working from the project's drawings and specifications.
Structural Work for Extensions
House extensions often involve significant structural alterations to the existing property. These may include openings through existing walls, steel beams, foundations and connections between the original building and the new structure.
Our team carries out structural building works in accordance with the project's structural engineering information and building requirements.
Building House Extensions Across London
RF Trojan Ltd works with homeowners on extension projects across North, West, East and Greater London.
We have experience working on different types of London properties, including Victorian and Edwardian houses, terraces, semi-detached homes and other residential properties.
Working on an existing London property requires careful consideration of the original structure, neighbouring buildings, access and the surrounding environment. Our experience in residential construction allows us to approach these projects with the practical considerations of working within an occupied or established property.
From Extension Plans to Construction
Once your architectural and structural information is available, we can review the proposed works and provide a quotation based on the project requirements.
During construction, our focus is on delivering the agreed works efficiently and maintaining a high standard of workmanship throughout the project.
Typical extension construction can involve:
Site preparation and protection
Groundworks and foundations
Drainage alterations
Structural steel installation
Brickwork and blockwork
External walls and insulation
Roofing
Windows and doors
Structural openings
Plastering
Internal building works
Flooring preparation
External finishes
Final building and finishing works
The exact scope will depend on the design, specifications and requirements of your individual extension.
Ready to Extend Your London Home?
If you are considering a house extension in London, RF Trojan Ltd can help turn your plans into a completed building project.
Whether you are planning a single-storey extension, double-storey extension, rear extension, side return or kitchen extension, we can discuss your requirements and provide a personalised quotation based on your project.
Planning an extension? Get in touch with our team today.
Areas we cover:
Central London
North London
West London
East London
Check out our Articles:
How Much Does a House Extension Cost in London? (2026 Guide)
Facade Restorations in London: Benefits, Concerns, and Why It’s Worth It
Contact Us
At RF Trojan, we are always ready to discuss your construction needs. Whether you're planning a new build, renovation, extension, or structural work, our expert team is here to provide advice and professional solutions.
Info@rftrojanltd.com
Tel: 020 8793 3503
Mob: 07568 589888
Alternatively, fill out our online contact form, and a member of our team will get back to you as soon as possible.
Let’s build something great together—get in touch today!