What services do you offer as builders in Raynes Park?

We're a full-service residential building company based in SW20. We handle house extensions, side returns, loft conversions, full house refurbishments, kitchens and bathrooms, all under a single contract with one project manager running the job.

Are you actually based in Raynes Park?

Yes. Our registered and trading address is in SW20, which is one of the reasons homeowners here choose us. It means quicker site visits, faster responses when something needs a decision, and a real working knowledge of local streets, planning and property types.

Do you work with architects on Raynes Park projects?

Regularly. A large share of our work is architect-led. We can join at RIBA Stage 3 to give buildability and cost input before the design is fixed, or come in at tender with drawings already complete. Either way we protect the design intent through to handover.

Do you know Merton Council's planning rules?

Yes. Most of Raynes Park falls under Merton Council, and we work with their householder application requirements regularly. Merton has no Article 4 Directions in force, so much of the stock outside conservation areas retains permitted development rights but we confirm the position for your specific address rather than assuming.

Can you work in Raynes Park's conservation areas?

Yes. SW20 includes the Cottenham Park, Copse Hill and Westcoombe Avenue conservation areas. Inside these, most visible external work needs full planning and usually a heritage statement. We handle this with your architect and, where the project calls for it, a heritage consultant.

Do I need planning permission for an extension in Raynes Park?

It depends on the property and where it sits. Many single-storey rear and side-return extensions on SW20's inter-war and Edwardian houses fall under permitted development, which we recommend confirming with a Lawful Development Certificate. Properties inside a conservation area, and most two-storey schemes, will need a full application to Merton. We assess this on the first visit.

What kinds of homes do you usually work on?

Mostly the local stock: 1930s semi-detached houses around West Barnes Lane and Grand Drive, Victorian and Edwardian terraces near the station, and the larger period family homes on the Apostles roads and toward Wimbledon Common.

How long does a Raynes Park project take?

A single-storey side return typically runs 12–16 weeks on site. A loft conversion is usually 8–12 weeks. A whole-house refurbishment with an extension can run 6–9 months. We give you a programme with your cost plan before work starts, not a vague estimate.

Do you handle Party Wall agreements?

Yes. Side returns and rear extensions on terraces and semis almost always trigger Party Wall matters. We coordinate the process and serve notices early so neighbours aren't surprised and the programme isn't held up.

How will I know what's happening during the build?

A dedicated project manager runs the job, with weekly written progress reports and scheduled valuations. You'll have one point of contact throughout rather than chasing different trades.

Architect-Led Builders in Raynes Park

Residential Construction · SW20 & South West London

Integral Builders are residential builders based in Raynes Park, working across SW20 on house extensions, loft conversions and full house refurbishments. We work closely with architects and homeowners, run each project with a dedicated manager, and finish to the standard that the area's Edwardian terraces and 1930s family homes deserve.

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15+ Years
Residential Construction

Architect-Led

RIBA Stage 3–6

SW20

Raynes Park · West Wimbledon · Cottenham Park

Trusted

Which? Verified Trader

Locally Active

Residential Builders Working Across Raynes Park

Raynes Park is a settled family suburb, and its housing tells you exactly what kind of work it needs. The streets north of the station hold Victorian and Edwardian terraces. The Apostles roads carry larger period family homes with original detail worth protecting. Around West Barnes Lane and Grand Drive you find 1930s semi-detached houses with bay windows, generous gardens and the kind of plot that takes a rear or side-return extension comfortably.

As residential builders based in SW20, we take on the projects these properties call for: side-return and rear extensions on the terraces, dormer and hip-to-gable loft conversions on the suburban semis, and full refurbishments of period homes. We work alongside architects, designers and homeowners across Raynes Park, West Wimbledon, Cottenham Park and West Barnes, turning drawings into a finished home that holds up.

Architect Collaboration

We work with your architect from the drawings through to handover, keeping the design intact along the way.

Technical Execution

Structural work, services, joinery and glazing done properly the parts you don't see are the parts that last.

Local Knowledge

A working understanding of Merton Council planning, the SW20 conservation areas, and how these streets are actually built.

Quality Craftsmanship

A directly employed core team and a trusted set of specialist trades, so the same standard runs through every job.

Our Capability

Our Services Across Raynes Park

From single-storey side returns to whole-house refurbishments, we deliver high-end residential construction on Raynes Park homes.

House Extensions Raynes Park

Single-storey, side-return, wrap-around and two-storey rear extensions for SW20 homes. The area's semis and terraces sit on plots that take extensions well, and we build them to add real, usable space.

Loft Conversions Raynes Park

Dormer, hip-to-gable, L-shape and mansard conversions. A well-planned loft turns the roof of a Raynes Park semi into an extra bedroom, en-suite or study without touching the footprint.

House Refurbishment Raynes Park

Whole-house refurbishment under one contract, from careful restoration of period homes around Cottenham Park through to full modern reworks of tired interiors.

Kitchens & Bathrooms

High-end kitchen and bathroom installations, either on their own or as part of a wider refurbishment, built to your designer's drawings and finished by hand.

Conservation Area Work

Sensitive work on homes inside the Cottenham Park, Copse Hill and Westcoombe Avenue conservation areas, using the right materials and methods for older properties.

Home Renovations

Full renovations for families staying put rather than moving — reconfigured layouts, upgraded services and finishes throughout, delivered as one coordinated programme.

Local Expertise

How Raynes Park's Homes and Planning Actually Work.

Being a good building contractor in Raynes Park means more than knowing how to build. It means understanding that SW20 sits across two boroughs — most of Raynes Park falls under Merton Council, while parts of the wider postcode reach into Kingston. The first question on any project is always which authority the property answers to.

Merton has 28 designated conservation areas, and no Article 4 Directions in force, which means much of the Edwardian and inter-war stock outside those areas keeps its permitted development rights for rear extensions and lofts. Inside Cottenham Park, Copse Hill and Westcoombe Avenue, the position changes — most visible external work needs full planning and a heritage statement.

It also means reading each street for what it is. The 1930s semis around West Barnes Lane and Grand Drive handle side returns and rear extensions well. The Victorian terraces near the station are natural candidates for dormer conversions. The larger Edwardian houses on the Apostles roads and toward Wimbledon Common reward careful restoration. We bring that reading to every brief, and we check the planning position before anyone picks up a tool.

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SW20 Conservation Areas

Design responses that suit Cottenham Park, Copse Hill and Westcoombe Avenue, worked out with the architect and, where needed, a heritage consultant.

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Merton Council Planning

A practical grasp of local planning policy, Permitted Development and Lawful Development Certificates, and what the council looks for in a householder application.

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Party Wall & Neighbours

Full Party Wall coordination, which matters as much for a side return on a Raynes Park terrace as it does for a two-storey extension on a semi, so neighbour relationships stay intact.

Project Delivery

Professionally Managed Project Delivery

A structured, four-stage delivery process applying commercial construction discipline to bespoke residential projects across Raynes Park.

01

Briefing

Initial Consultation

A private consultation at your Raynes Park home to understand the brief, the design, and who else is already involved.

Site visit and design review
Feasibility discussion
Early cost guidance

02

Pre-Construction

Planning & Coordination

We work with your architect, engineer and any planning consultant, and set out a detailed cost plan and programme before work starts.

Architect and engineer liaison
Cost & programme planning
Merton Council & Party Wall

03

On Site

Construction Phase

A dedicated project manager runs the build to the programme, with weekly written reports and proper quality control.

Weekly progress reporting
Quality and health & safety
Coordinated trade sequencing

04

Closeout

Completion & Finishing

A full snagging process, certification, handover documentation and an aftercare period once you're back in.

Detailed snagging and sign-off
Certification and warranties
Aftercare and support

Recent Work

Recent Projects in Raynes Park

One recent scheme that shows how we work on the period and inter-war homes around SW20. Architect-led from the first drawings through to handover, run to an agreed programme with a dedicated project manager, and finished with the kind of detail that only shows up when you look closely.

Case Study

A side-return extension and full refurbishment of an Edwardian terrace in Raynes Park.

An Edwardian mid-terrace off Coombe Lane, extended and reworked with the family's appointed architect. The plan opened up the ground floor with a side-return extension for a larger kitchen-diner, alongside a dormer loft conversion and a full refurbishment of the existing house.

The work threw up the usual questions of an older property: foundations that needed checking before the new structure could sit on them, a roof reworked to take the loft, and services brought up to current standards throughout. We agreed Party Wall terms with both neighbours early, phased the build so the family could stay in part of the house, and matched the new brick and detailing to the original so the extension reads as part of the house rather than an addition.

Scope

Side-return extension · dormer loft conversion · full refurbishment

Collaboration

Architect-led, interior designer

Footprint

32m² added · whole-house refurbishment

Finish

Matched brickwork · restored period detail

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“The builders followed the architectural plans to the letter and we could not be happier with the result, the detail, and the quality of the finish. When problems came up, as they always do on a project like this, they owned them and sorted them out.”

The Integral Difference

Why Raynes Park Homeowners Choose Integral Builders.

Architects and homeowners across SW20 come back to us for the same reasons: a calm, organised approach and a build that's actually run like a proper job.

Based in Raynes Park

We're not a London-wide contractor covering SW20 from a distance. Our base is here, which means shorter response times, easier site visits, and a genuine working knowledge of these streets.

High-End Residential Expertise

Residential construction is our speciality. Our experience across extensions, loft conversions and full refurbishments allows us to deliver consistently high standards across Raynes Park projects.

Collaborative with Architects

We work closely with architects and designers, taking time to understand the drawings and specifications and ensuring the original design intent is maintained throughout construction.

Project Coordination

Every project has a dedicated manager, a clear programme, regular written progress reports and scheduled valuations, keeping the build organised from start to finish.

Merton Planning Knowledge

Our understanding of Merton Council, local planning requirements, the SW20 conservation areas and the character of these streets helps us approach each project with practical local knowledge.

Quality Workmanship

Our core team works alongside carefully selected specialist trades to maintain high standards of workmanship. Every project is completed with attention to detail and backed by our workmanship guarantee.

Reliable Communication

You will have a clear point of contact throughout the build, with regular written updates, scheduled valuations and straightforward communication, so you always know what is happening.

Single Principal Contract

Whether you are planning an extension, loft conversion or whole-house refurbishment, we provide one principal contract, one programme and one point of responsibility.

Considered Programme & Sequencing

We plan construction around the practical realities of your home and family life. Careful sequencing helps minimise disruption while keeping the project moving towards a high-quality finish.

Frequently Asked Questions

Builders in Raynes Park

Talk to Us About Your Raynes Park Project. With Our Team.

A Straightforward Conversation

Every project starts with a proper conversation about your home, your brief and what you want to achieve. We're happy to hear from architects, interior designers, project managers, and homeowners alike.

Send us your brief, and we'll come back with a sensible next step no pressure, no obligation.

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