Single storey extension
Single storey extension
Single storey extension
Single storey extension
Single storey extension
Single storey extension
Single storey extension
Single storey extension
Architect-Led House Extensions in Surbiton
Integral Builders deliver bespoke house extensions in Surbiton with a focus on architectural collaboration, professional project management, and high-end residential construction for architects, interior designers, and discerning homeowners across South West London.
Working Alongside Architects
High-End Residential Projects
Professionally Managed Delivery
Tailored Construction Solutions
A Considered Approach
Bespoke House Extensions
Tailored to Your Home
Every home in Surbiton tells a different story from elegant Victorian terraces and 1930s semis to substantial detached family residences. As architect-led house extension builders, we design and deliver bespoke house extensions tailored around how our clients actually live, not around a generic template.
As a house extension company trusted by architects, interior designers and discerning homeowners across SW London, our role is to translate considered design into beautifully built reality with the technical rigour and communication
discipline that high-end residential construction demands.
-
Designed Around Lifestyle Every brief begins with how your home should feel and function not what's easiest to build.
-
Architect & Designer Collaboration We work alongside architects and designers from concept through to completion, protecting design intent throughout.
-
Technical Execution Structural detailing, MEP coordination, joinery, glazing — the craft underneath the finish, done properly.
-
Quality Craftsmanship A directly employed core team and vetted specialist trades — the same hands on every project.
Our Capability
House Extension Services in Surbiton
From considered single-storey schemes to ambitious whole-house remodels, our capability spans the full range of bespoke house extensions across Surbiton and the wider South West London area.
Architect Collaboration
Working Alongside Architects & Designers.
A great house extension begins on the drawing board — and is judged by how faithfully it is realised on site. As architect-led extensions specialists, we collaborate closely with architects, interior designers, and project managers to translate considered design into precisely executed construction.
From accurate interpretation of detailed drawings to clear written communication throughout the build, our role is to protect design intent — not to value-engineer it away. It's the discipline that premium extension builders bring to every project.
Stage 3
Buildability & Pre-Tender Input
Engaged early to advise on construction sequencing, structural strategy, and indicative cost — protecting design intent before the tender stage.
Stage 4
Tender & Specification
Transparent, line-by-line tender returns. We price what is drawn, flag queries openly, and propose alternatives where appropriate.
Stage 5
Construction & Communication
Weekly progress reports, RFIs raised in writing, formal valuations on schedule clear communication that protects the architect-client relationship.
Stage 6
Handover & Aftercare
Engaged early to advise on construction sequencing, structural strategy, and indicative cost protecting design intent before the tender stage.
Project Delivery
Professionally Managed Project Delivery.
A structured, four-stage delivery process — applying the discipline of commercial construction management to bespoke residential extensions.
01
Briefing
Initial Consultation
A confidential consultation to understand your home, your brief and the architectural vision — alongside any existing drawings or design team already engaged.
-
Site visit & design review
-
Feasibility discussion
-
Indicative cost guidance
02
Pre-Construction
Planning & Coordination
Coordination with architects, structural engineers and planning consultants supported by a detailed cost plan, full programme and contract documentation.
-
Architect & engineer liaison
-
Programme & cost planning
-
Party Wall & building control
03
Briefing
Initial Consultation
A dedicated project manager runs the build to a structured programme with weekly progress reports, formal valuations, and disciplined quality control throughout.
-
Weekly progress reporting
-
Quality & H&S management
-
Coordinated trade sequencing
04
Briefing
Completion & Finishing
Comprehensive snagging, certification, O&M documentation and a structured aftercare period a professional closeout for client, architect, and home.
-
Detailed snagging & sign-off
-
Certification & warranties
-
Aftercare & support
"From start to finish they were excellent, I would not think twice about using these guys again, I would give them 6 stars if I could!"
Chris, Plaistow
Google, 2022
The Integral Difference
Why Homeowners Choose
Integral Builders.
For house extensions in Surbiton, architects and homeowners return to us for the same reasons: a measured approach, an uncompromising standard of finish, and the discipline of a properly run construction practice — not a generalist builder.
High-End Residential Expertise
Our entire practice is built around bespoke house extensions and high-end residential construction in Surbiton and across SW London. It is the only work we do, which is why the standard of detailing, finish, and project judgement holds consistently from one home to the next.
Experienced Project Coordination
Every house extension in Surbiton is run by a dedicated project manager working to a clearly programmed schedule, with formal weekly reporting and structured valuations. The same project-management discipline expected on commercial contracts is applied to private residential work.
Collaborative Approach with Architects
We engage with architects and interior designers as design partners — interpreting drawings faithfully, raising RFIs in writing, and protecting the design intent from initial tender through to final handover. The architect's reputation matters as much to us as our own.
Attention to Detail
Threshold transitions, joinery returns, shadow gaps, glazing junctions, plaster reveals — the considered details that separate a finished extension from a truly considered one. We resolve them at the design stage and execute them faithfully on site.
Quality Workmanship
A directly employed core team alongside carefully vetted specialist trades, the same skilled hands on every project, supported by a structured workmanship guarantee. No revolving subcontractors, no compromised standards.
Reliable Communication
Clear written progress reports, formal valuations on schedule, and a single point of contact throughout the build. You always know where the project stands, and so does your architect. Transparency is not a service we offer; it is how we operate.
Structured Delivery Process
From RIBA Stage 3 buildability input through to Stage 6 handover, every house extension in Surbiton follows the same structured delivery process, properly programmed, properly documented, properly closed out.
Locally Rooted in Surbiton
Based in Surbiton, we know the local housing stock intimately. Victorian terraces around Maple Road, 1930s semis off Tolworth Rise, substantial detached homes throughout Berrylands and beyond. Local knowledge that informs every architectural decision.
Considered Programme & Sequencing
Each house extension is delivered to a programme that respects both architectural sequencing and the family living in the home. Trades are coordinated thoughtfully, not improvised — protecting timeline, quality, and client experience throughout.
Frequently asked questions
Discuss Your House Extension Project in Surbiton.
A Considered Conversation
Every architect-led house extension in Surbiton begins with a confidential, considered conversation about your home, your brief and your design ambitions. We welcome enquiries from architects, interior designers, project managers and private homeowners — whether you are at the earliest concept stage with a sketch and an idea, or arriving with a fully detailed tender package ready for pricing.
Share your brief and we will respond with the next considered step without pressure, without obligation.