Built With Strength, Precision & Craftsmanship
Quality home extensions, renovations, and property services across London. From initial design to completion, we deliver exceptional craftsmanship on time and on budget.
01 Eco-Friendly
Energy Efficient
02 Quality Assured
10-Year Guarantee
Victorian Townhouse Full Refurbishment & Glass Extension
Experience
Quality Workmanship
Federation of Master Builders (FMB) audited standards with high-quality finishes on every project.
Dedicated Project Manager
Your direct point of contact with regular weekly updates and clear communication throughout.
Certified London Trades
Qualified Gas Safe and NICEIC approved tradespeople backed by £5M public liability insurance.
Trusted London Builders & Home Renovation Specialists
With over 15 years of building experience, JSTM Construction helps London homeowners create beautiful, practical spaces. Whether you need a ground-floor extension, a loft conversion, or a full house refurbishment, we deliver quality workmanship with transparent pricing and clear communication.
"Our goal is straightforward: deliver top-quality building work without the stress. We keep you updated, stick to agreed budgets, and build spaces your family will enjoy for years to come."
Tradesmen
Complete Building Services Across London
From house extensions and loft conversions to full house refurbishments, we provide complete, reliable building solutions with guaranteed quality.
House Extensions
Rear, side-return, and wrap-around extensions that create bright, spacious open-plan living for your home.
- Bi-fold, sliding & Crittall doors
- Structural steel beams & foundations
Loft Conversions
Turn unused attic space into an extra master bedroom, en-suite bathroom, or a comfortable home office.
- Mansard, Dormer & Velux setups
- Party Wall & Building Control support
Full Refurbishments
Complete home makeovers, including wall removals, layout redesign, new electrical wiring, and plumbing.
- Complete interior & exterior overhaul
- Energy-efficient insulation & soundproofing
Kitchens & Bathrooms
Modern fitted kitchens, luxury family bathrooms, walk-in wet rooms, and premium stone worktops.
- Custom kitchen units & breakfast bars
- Walk-in showers & waterproof wet rooms
Roofing & Structural
Pitched slate and tile roofs, GRP flat roofing, chimney repairs, and load-bearing steel beam installations.
- Structural engineer calculations & drawings
- 20-year flat roof warranties
Flooring & Tiling
Hardwood engineered flooring, herringbone parquet, porcelain tiling, and energy-efficient underfloor heating.
- Level subfloor screed & prep
- Wet & electric UFH systems
Painting & Decorating
Interior and exterior painting, smooth plastering, quality decorative finishes, and woodwork restoration.
- Dustless sanding preparation
- Specialist decorative moulding
General Building & Joinery
Brickwork, foundations, garden rooms, bespoke fitted wardrobes, alcove shelving, and internal doors.
- London brick matching
- Custom artisan carpentry
Need advice on your upcoming project?Speak directly with our building team →
Have a London Project in Mind? Let’s Talk.
Get straightforward advice and an estimated budget guide for your project within 24 hours. No obligation.
Our Simple 4-Step Building Process
We manage your build carefully from first consultation to final inspection, keeping your project on time and on budget.
Planning & Feasibility
We visit your property to discuss your ideas, assess structural feasibility, and advise on planning rules.
Design & Engineering
Detailed architectural drawings, structural engineer calculations, and building regulations submissions.
Construction & Build
Skilled tradesmen working on-site, managed daily by your project manager with clean workspaces and weekly updates.
Final Inspection & Handover
Building Control sign-off, full snagging walkthrough, and your 10-year warranty guarantee pack.
Your Trusted London Construction Partner
We take the hassle out of building work: clear pricing with no hidden surprises, agreed completion dates, and certified builders you can trust.
We take care of your home from foundations to finishes.
Every project is fully covered by our comprehensive liability insurance, signed off to UK building standards, and delivered by tidy, considerate tradespeople.
Client Satisfaction
London Homes Delivered
Years Experience
Insured & Guaranteed
Recent Transformations Across London
Take a look at some of our completed home extensions, loft conversions, and full house renovations across London.
Kensington Edwardian Townhouse
Complete 4-storey townhouse renovation, modern insulation, open-plan kitchen, and bespoke herringbone wood flooring.
Richmond Skyline Mansard Loft
Created two spacious double bedrooms and a luxury walk-in shower room with custom Juliet balconies.
Wandsworth Open-Plan Living
Wrap-around ground floor extension with large sliding glass doors, rooflights, and a bright new family kitchen.
Battersea Modern Kitchen & Extension
Rear kitchen and dining extension with slimline steel doors, integrated skylights, and seamless patio garden flow.
Wimbledon L-Shaped Dormer Loft
Spacious master bedroom suite conversion with custom fitted wardrobes, en-suite bathroom, and panoramic skyline views.
Chelsea Townhouse Interior Remodel
Complete interior overhaul including load-bearing wall removals, acoustic insulation, and handcrafted architectural joinery.
Fulham Bespoke Kitchen & Island
Handcrafted contemporary kitchen island with waterfall quartz worktops, bespoke cabinetry, and ambient lighting.
Mayfair Marble En-Suite Bathroom
High-spec Italian marble bathroom featuring a walk-in rainfall shower, bespoke vanity unit, and concealed LED lighting.
Clear & Transparent Pricing Guide
Every home is unique, but our guide prices give you a realistic idea of costs before we provide a free, itemized quote.
Room / Floor Refurbishment
High-quality upgrade for single rooms, bathrooms, or full apartment floors.
- Full strip-out & rubbish removal
- New wiring & NICEIC electrical certificate
- Premium plastering & decorating
- Engineered flooring installation
- 5-Year Craftsmanship Guarantee
Extension / Loft Conversion
Rear or side-return extension, or a full dormer loft conversion.
- Structural steel installation & foundations
- Building Regulations & planning support
- Bi-fold doors, rooflights & flat roofing
- Energy-efficient insulation & underfloor heating
- 10-Year Insurance-Backed Guarantee
Complete House Renovation
Full house transformation from bare brick to premium painted finishes.
- Full layout redesign & wall removals
- New fitted kitchen & luxury bathrooms
- Complete new heating, plumbing & electrics
- Full-time on-site Project Director
- 10-Year Structural Guarantee
& Houzz Rating
"JSTM Construction carried out our rear kitchen extension and loft conversion in Fulham. Their pricing was completely transparent from start to finish. They finished two weeks ahead of schedule and the quality of the finish is outstanding."
Dr. Julian & Sarah Thorne
Fulham SW6 • Full Ground Extension & Mansard Conversion
Official Certifications & Accreditations
Book a Free Site Survey & Quote
Tell us about your project below. Our team will review your requirements and get back to you within 24 hours with free, friendly advice.
Our London Office & Operations
Call or message us directly to discuss your project. We manage residential building projects across all London boroughs daily.
Office Address
JST Construction Suite A204, 2nd Floor Vista Centre
50 Salisbury Road, Cranford, Hounslow TW4 6JQ, United Kingdom
Serving all 32 London Boroughs & Greater London
Key Areas We Cover Across London:
Kensington & Chelsea, Westminster, Hammersmith & Fulham, Wandsworth, Richmond, Islington, Camden, Southwark, Lambeth, Greenwich, Wimbledon, and Hampstead.