House extensions
Extensions designed to add light, space and value to your home.
ARCHITECTURAL DESIGN · LONDON & SOUTH EAST
Planning Drawings Designed by the Team That Builds Them
Feasibility studies, planning and building regs drawings for extensions, lofts and renovations.Feasibility studies, architectural design, planning applications and building regulations drawings for extensions, loft conversions and renovations — with one team from first sketch to final handover.
- Free design consultation
- Fixed-fee packages from £999 inc VAT
- Established 2017 · 800+ projects delivered
4.9from 500+ reviews across Google Reviews, Reviews.io, TrustATrader and Houzz
Book your free design consultation
Talk to our design team about your project. No cost, no obligation. We reply within 24 working hours.
Real Projects
Watch Real Projects Come Together
See the work behind the finish — on-site, walkthroughs and start to handover.
4.9★ from 500+ reviews on Google, Houzz, Reviews.io & TrustATrader
Client Stories
Hear From Our Clients
Real projects, real results — straight from the people we've worked with.
Your project, step by step
Six clear stages, from first enquiry to completion.
For clients who need the whole project managed: design, planning, building regulations and construction, from initial enquiry through to completion.
Step 1: Initial Consultation & Feasibility
Timeline: 1–3 days
Initial consultation to discuss requirements, ideas and budget.
Step 2: Architectural Design & Drawings
Timeline: 1–4 weeks
Architectural drawings and proposed layouts.
Step 3: Planning Permission
Timeline: 6–12 weeks (estimated)
Planning application preparation and submission.
Step 4: Structural Engineering & Building Regulations
Timeline: 1–3 weeks, depending on complexity
Structural calculations and drawings.
Step 5: Contract & Building Works
Timeline: Typically 4–20+ weeks, depending on project type
Begin construction and manage all building works.
Step 6: Completion & Handover
Final client walkthrough and handover.
All timelines are indicative. Your project-specific schedule is confirmed before construction.
4.9★ from 500+ reviews
Established 2017
800+ projects delivered
London & the South East
Clear, fixed-fee design packages
Each package includes everything in the one before it. Prices include VAT, with flexible milestone payments and no large upfront deposit. Not sure yet? Start with a feasibility study.
Basic
Planning or permitted development sign-off
Fixed price
£999
Includes
- Full architectural drawings
- 3D home scan measured survey
- Application submission
- Video meetings with your designer
- Client dashboard (mobile and web)
Most Popular
Standard
Basic, plus Building Control sign-off
Fixed price
£1,500
Everything in Basic, plus
- Building control plans and specification
- Full Plans Building Control submission
Premium
Comprehensive solution for a smooth project
From
£3,000
Everything in Standard, plus
- Structural engineer calculations
- Build cost report and schedule of works
- Exterior 3D visualisations
- Party wall pack
Ultimate
All-inclusive: interiors, M&E and full design
From
£6,000
Everything in Premium, plus
- Interior design
- M&E (mechanical and electrical) drawings
Prices include VAT. Council application fees and Building Control notice fees are statutory charges payable directly to your local authority and are not included in package pricing.
500+
Reviews Online
4.9★
Average Rating
99%
Rated 4–5 stars
Customer Reviews
Read what our customers say about our services
★★★★★
The phase of architectural design and drawings was overseen with remarkable skill and meticulousness. After conducting a thorough property survey, excellent architectural drawings and suggested layouts were created. The team meticulously took into account every comment, producing design changes quickly and guaranteeing a smooth approval process all along the way. Thanks, Linx Owner Gary Pal and your all Guys!!!
Michael B. · Reviews.io ·
★★★★★
LINX Design and Build completed our loft conversion to an exceptional standard and delivered everything on schedule. The team provided clear daily updates, maintained a clean and safe worksite, and demonstrated outstanding craftsmanship throughout the project. Our dedicated project manager ensured a smooth, stress-free experience. We highly recommend their renovation services.
Robert P. · Reviews.io ·
★★★★★
Outstanding service from LINX Design and Build. From the initial consultation to the final handover, the team was professional, knowledgeable, and hardworking. Their commitment to quality, innovation, and customer satisfaction was evident throughout the project. Every aspect of the build was completed with care and precision, resulting in a finished home that exceeded our expectations. We highly recommend LINX Design and Build for anyone looking for a trustworthy and experienced building company.
Joseph P. · Reviews.io ·
★★★★★
We are extremely happy with our kitchen infill extension and renovation. The team was professional, friendly, and reliable throughout. Their workmanship and attention to detail were excellent, transforming our space beautifully. Highly recommended for quality, service, and outstanding results!
James K. · Reviews.io ·
★★★★★
We are thrilled with our brand-new Leicester house. Everything from design and planning to construction and handover was expertly handled by the LINX Team. The attention to detail, communication, and craftsmanship were outstanding. Strongly advised for every new construction project. The ⭐⭐⭐⭐⭐
Tim H. · Reviews.io ·
★★★★★
With great professionalism, LINX Design and Build completed an amazing loft conversion and addition. Throughout, the project management, communication, and craftsmanship were of the highest calibre. The finished product creates a lovely new living area that integrates in perfectly with our house. They were completed at a very high standard and on time, and we heartily recommend them.
William R. · Reviews.io ·
Free Design Consultation
Free consultation with our head designer, Thomas
Talk your project through with Thomas Phillips, our Head of Design. Get honest advice on what you can build, planning, budget and next steps — pick a time that suits you.
Book with Thomas Free No obligation Video, phone or in-person
Our architectural design services
From a first feasibility study to build-ready drawings — for every type of home project.
Projects we design
Loft conversions
Loft conversions planned around head height, stairs and light.
Renovations & remodelling
New layouts for the way you live now.
Garage conversions
Turn an unused garage into a room you use every day.
Basement conversions
Extra space below ground, designed and built by one team.
New builds & conversions
Full design for new homes and property conversions.
Design & planning services
Why design with the team that builds it
Designed with real build costs in mind
- LINX
- Yes
- Architect-only
- Varies
One point of contact from design to handover
- LINX
- Yes
- Architect-only
- Separate builder
Fixed build price from the same team
- LINX
- Yes
- Architect-only
- Quotes from other builders
Drawings and build under one roof
- LINX
- Yes
- Architect-only
- No
| Comparison | LINX Design and Build | Architect-only |
|---|---|---|
| Designed with real build costs in mind | Yes | Varies |
| One point of contact from design to handover | Yes | Separate builder |
| Fixed build price from the same team | Yes | Quotes from other builders |
| Drawings and build under one roof | Yes | No |
See how we take a project from drawing to build
90 seconds with our design team and one of our clients.
Not always. Many projects fall under permitted development. We check this at your free consultation and, where it applies, can apply for a lawful development certificate for peace of mind.
A feasibility study tells you what is realistically possible on your property — planning potential, layout options and a budget range — before you pay for full drawings. It is ideal if you are not yet sure what you can do. If you already know what you want, you can go straight to a design package.
Yes. We look at head height, roof structure and where the staircase could go at your free consultation, and in full detail as part of a feasibility study or survey.
Once your application is submitted and validated, councils usually decide householder applications within 8 weeks.
We talk you through the council's reasons and your options, which may include amending the design and resubmitting. We will confirm what is included in your package before you commit.
Design packages start from £999 inc VAT. Your exact fee depends on the size and complexity of the project and is confirmed after your consultation.
No. The drawings are yours to use with any builder. Most clients choose to continue with us because we already know every line on the plan.
London and South East England, including Surrey, Kent and the surrounding counties.
Covering London & the South East
London boroughs
- Chelsea & Kensington
- Westminster & Central
- Wandsworth & Putney
- Lambeth & Brixton
- Southwark
- Hackney & Shoreditch
- Islington
- Camden
- Tower Hamlets
- Greenwich & Lewisham
- Richmond & Twickenham
- Ealing & Acton
- Hounslow & Isleworth
- Bromley
- Croydon
- Barnet & Finchley
- Wimbledon & Merton
- Kingston & Surbiton
- Sutton
South East counties
- Surrey
- Kent
- Essex
- Hertfordshire
- Berkshire
- Buckinghamshire
Start with a free design consultation
Tell us about your project and we'll call you within 24 working hours.
- Free design consultation
- Fixed-fee packages from £999 inc VAT
- Established 2017 · 800+ projects delivered
Book your free design consultation
Tell us about your project and we'll call you within 24 working hours.
- from 500+ reviews
- 4.9★
- workmanship
- Guaranteed
- projects completed
- 800+
- London & the South East
- Est. 2017
Featured projects
Designed and built by LINX.
What we do
One team. Every discipline.
From the first sketch to the final handover: architecture, residential, commercial and new builds, delivered under one accountable roof.
01
Residential
Home Extensions
Rear, side, wrap-around and double-storey, planned, approved and built by one team.
From £60,000Explore
02
Residential
Loft Conversions
Dormer, hip-to-gable and mansard lofts, with en-suites and storage built in.
From £55,000Explore
03
Residential
Full House Renovations
Whole-home refurbishments, from period restorations to full structural overhauls.
From £40,000Explore
04LINX design visual
Architecture
Architectural Design
Planning drawings, structural calculations, building regulations and 3D visualisations.
From £2,000Explore
05LINX design visual
New Builds
New Build Homes
Ground-up new homes and land-led developments, delivered end to end.
From £160,000Explore
06LINX design visual
Commercial
Commercial Fit-Out & Construction
Offices, retail, restaurants, gyms and clinics: Cat A and Cat B fit-outs with end-to-end M&E.
From £30,000Explore
Looking for something specific?
Explore all servicesCommercial
Commercial fit-outs & construction.
Commercial construction and fit-outs across London & the South East: offices, restaurants, gyms, retail and healthcare, with full project management by LINX.
Office Fit-Outs
From £45,000
Retail Fit-Outs
From £30,000
Restaurant Fit-Outs
From £50,000
Gym Fit-Outs
From £60,000
Beauty, Spa & Wellness
From £30,000
Medical & Healthcare
From £55,000
Industrial & Warehouse
Price on application
Commercial New Builds
From £260,000
Images are illustrative design visuals
Our Trusted Partners
AUTHORISED SUPPLIERS
Our team
The People Behind LINX
An in-house team delivering every project from first sketch to final handover — backed by 60+ tradesmen on site.
Gary Pal
Managing Director
Cristian Ghertan
Construction Director
Ryan Anthony
Project Manager
Atul Singh
Project Manager
Steve McDermott
Project Consultant
Alexis Urbina
Business Development Manager
Vishal Gajjar
Business Growth Strategist
Thomas Phillips
Head of Design
Manisha Silwal
Customer Service
Joseph Gomes
Tech / IT