About Our House Extension Services
At Nelhams & Sons, we create exceptional house extensions designed entirely around your family’s needs, lifestyle, and vision for your home. Our extension work goes beyond simply adding space – each project is individually designed to seamlessly integrate with your existing property, maximise natural light, and transform how your family lives and entertains at home.
Our House Extension Services
We design and build extensions that enhance your home’s functionality, value, and appeal. At Nelhams & Sons we specialise in:
Single & Double-Storey Extensions
Rear kitchen/dining extensions to create open-plan family spaces, side-return extensions for Victorian terraces, and double-storey additions for bedrooms and bathrooms.
Loft Conversions & Dormers
Transform unused roof space into bedrooms, home offices, or playrooms with dormer windows, Velux installations, and full staircase access to maximise your home’s potential.
Wrap-Around & Garden Room Extensions
Comprehensive L-shaped extensions for corner plots, orangeries, garden rooms, and contemporary glass extensions that blur the boundaries between indoor and outdoor living.
How We Work
Creating your perfect extension is a collaborative journey from initial design through to completion. Our proven process ensures your vision becomes reality whilst adding maximum value to your home.
| Step | What to Expect |
|---|---|
| Initial Consultation | We discuss your extension requirements, family needs, and budget parameters |
| Site Survey | Detailed measurements and structural assessment of your existing property |
| Design Development | We create initial design concepts that maximise space and natural light |
| Planning Assessment | We determine whether planning permission is required or if Permitted Development applies |
| Planning Application | If required, we prepare and submit planning applications to your local council |
| Building Regulations | We handle all Building Regulations submissions for structural and safety compliance |
| Detailed Quotation | Comprehensive quote covering all construction phases, materials, and finishes |
| Contract Agreement | Finalise contracts, timelines, and construction schedule |
| Construction Phase | Professional build management with minimal disruption to your daily life |
| Quality Control | Regular inspections and Building Control sign-offs at key construction stages |
| Completion & Handover | Final finishing touches, snagging completion, and handover of your new space |
Planning Expertise
Expert knowledge of Permitted Development rights and local planning requirements
Seamless Integration
Extensions designed to complement your existing property’s character and style
Minimal Disruption
Careful project management to minimise impact on your family’s daily routine
Added Value
Extensions designed to maximise your property’s value and market appeal
Why Choose Nelhams & Sons for Your Extension?
Our experienced extension team understands how Surrey and West London families live, work, and entertain at home. We combine architectural sensitivity with practical family living to create extensions that enhance your lifestyle whilst respecting your property’s character. Each extension is designed to maximise natural light, improve flow between spaces, and create the additional room your family needs to thrive.
- Specialist knowledge of Victorian, Edwardian, and modern property types
- Expert planning and Permitted Development guidance
- Structural engineering support for complex extensions
- 48+ years experience in Surrey and West London extensions
- Comprehensive project management minimising disruption
Best Surrey Business Award
Frequently Asked Questions About House Extensions
Do I need planning permission for my extension?
Many extensions can be built under Permitted Development rights without planning permission, including single-storey rear extensions up to 6 metres (terraced/semi-detached) or 8 metres (detached), and double-storey extensions up to 6 metres. However, rules vary by property type, location, and previous extensions. We assess your specific situation and guide you through the requirements.
What types of extensions do you build?
We specialise in single-storey rear extensions for kitchen/dining spaces, double-storey extensions adding bedrooms and bathrooms, side-return extensions for Victorian terraces, wrap-around L-shaped extensions, loft conversions with dormers, and garden rooms or orangeries. Each extension is designed to complement your existing property whilst maximising space and natural light.
How long does an extension take to complete?
Single-storey extensions typically take 8-12 weeks to complete, whilst double-storey extensions require 12-16 weeks. Loft conversions usually take 6-10 weeks depending on complexity. These timelines include Building Control inspections and weather contingencies. We provide detailed schedules during the quotation process and maintain regular communication throughout construction.
Can I stay in my home during construction?
Most clients remain in their homes during extension work. We carefully plan construction phases to minimise disruption, maintain access to essential facilities, and provide temporary solutions where needed. For kitchen extensions, we arrange temporary cooking facilities. We work clean, tidy sites and communicate daily schedules to help your family plan around construction activities.
Will my extension match my existing house?
Absolutely. We take great care to match materials, brickwork, roof tiles, and architectural details to ensure seamless integration with your existing property. Our experience with period properties means we understand traditional construction methods and can source matching materials. The goal is an extension that looks like it was always part of your home.
How much value will an extension add to my property?
Well-designed extensions typically add significant value, often exceeding the construction cost. Single-storey kitchen extensions can add 10-15% to property value, whilst double-storey extensions adding bedrooms can increase value by 15-20%. The exact increase depends on your location, property type, and quality of design. We design extensions with both lifestyle enhancement and value maximisation in mind.
