KJC ARCHITECTS
  • Home
  • About
    • About KJC Architects
    • Inside the Office
    • Testimonials
  • Services
  • News
  • Projects
  • Contact

Architectural Services

Your project built, not just designed. Many architects stop at planning permission. We manage every stage from first conversation through to completion on site, so your design is realised exactly as intended.
We sensitively refurbish period properties for contemporary living, design timeless new buildings including subterranean extensions, and create spaces you want to live and work in. Based in Carshalton, Surrey, we work with homeowners across Sutton, Kingswood, Cobham, Esher, Wimbledon, Banstead, Croydon and the wider South London area.
RIBA Chartered Practice logo RIBA Chartered Practice
Book a Consultation
Modern extension by KJC Architects — Green Curve, Banstead

What We Do

Extensions & Refurbishments

Rear, side and wraparound extensions. Period property refurbishments for contemporary living.

View projects

Loft Conversions

Dormer, hip-to-gable and mansard conversions that maximise space and light.

View projects

New Build Housing

Bespoke residential new-builds from concept through planning and construction.

View projects

Interior Design

Bespoke joinery, material selection, floor finishes and wet room specification.

View projects

Commercial & Mixed Use

Offices, retail, hospitality and mixed-use developments.

View projects

Petite Projects

Smaller commissions where design-led thinking makes a disproportionate difference.

View projects

Our Process

  1. Stage 1

    Initial Consultation

    You have an idea for your home but you are not sure where to start — whether it is feasible, what it might cost, or whether you need planning permission. We meet for a 1–2 hour consultation to understand your aspirations, assess your property, and give honest advice on design, planning and budget.

    You receive: Written feasibility summary · Budget guidance · Clear next steps
  2. Stage 2

    Survey

    Accurate measurements are the foundation of every project. For smaller works we survey in-house; for larger projects we coordinate a specialist surveyor. The result is a complete record of your property — plans, sections, elevations and a photographic catalogue.

    You receive: Measured drawings · 3D model of existing building · Photographic record
  3. Stage 3

    Concept Design

    We develop multiple design options that respond to your brief, site constraints and planning context. You review 3D walkthroughs and hardline drawings, select the elements that work best, and we refine a hybrid design that brings together the strongest ideas.

    You receive: Design options with 3D models · Interactive walkthrough · Refined concept drawings
  4. Stage 4

    Planning

    Depending on scale, your project may fall under permitted development or require a full planning application. We advise on the right route, prepare all drawings and documentation, submit the application, and liaise with the council through to a decision. Householder applications typically take 8–12 weeks.

    You receive: Planning drawings · Application management · Council liaison through to decision
  5. Stage 5

    Detailed Design

    Before construction starts, the design must comply with Building Regulations. We develop your planning drawings into detailed technical drawings and specifications, coordinate with structural engineers and other consultants, and submit a complete package for Building Control approval. Interior design is integrated at this stage — material selection, bespoke joinery, floor finishes and wet room specification.

    You receive: Technical drawings · Building Control submission · Interior design selections · Coordinated consultant package
  6. Stage 6

    Tender

    A detailed tender package means contractors quote against your actual design, not their assumptions. Without this, assumptions become extras. We prepare dimensioned plans, detailed drawings, finish schedules and specifications so you receive comparable, itemised quotes with no hidden surprises.

    You receive: Tender package · Contractor shortlist · Comparable quotes · Recommendation
  7. Stage 7

    Construction

    We work with your contractor throughout the build, coordinating drawings, resolving site queries and keeping the project on programme. As contract administrators using industry-standard JCT and RIBA contracts, we assess completed works at set stages and only release payments against verified progress — so you know you are getting what you paid for.

    You receive: Site coordination · Progress inspections · Certified payment stages · Contractual protection

Ready to Discuss Your Project?

Every project starts with a conversation. Tell us about your property and what you have in mind, and we will let you know how we can help.

Get in Touch View Our Projects
020 3745 4405

Practice

KJC Architects Full architectural service from design through to completion. We manage every stage so your project is built, not just designed.
RIBA Chartered Practice Chartered Practice
RIBA No. 20017685 · ARB No. 079900I

Projects

  • Residential
  • New Build
  • Commercial
  • Interiors
  • Hospitality
  • Education

Get in Touch

2 Grove Cottage, Old Watercress Walk
Carshalton, SM5 3BD
020 3745 4405 info@kjcarchitects.co.uk Instagram Discuss Your Project
© 2026 KJC Architects Ltd · Privacy Policy · Sitemap
Serving Carshalton, Sutton, Kingswood, Cobham, Esher, Wimbledon, Banstead & Croydon
  • Home
  • About
    • About KJC Architects
    • Inside the Office
    • Testimonials
  • Services
  • News
  • Projects
  • Contact