London residential extension and construction by JSTM Construction

RESIDENTIAL SERVICES LONDONPROFESSIONAL RESIDENTIAL BUILDING SERVICES ACROSS LONDON

High-Quality Building, Renovation & Extension Services in London

From house extensions and loft conversions to complete home renovations and structural works. We deliver exceptional craftsmanship, fixed-price quotes, and reliable service across London.

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10-Year WarrantyInsurance-backed policy

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FMB Master BuilderVerified & TrustMark cert

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Dedicated Site ManagerDaily on-site management

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Fixed-Price QuotesNo hidden surprises

Our Services

Expert Building Services for Every Project

Every project is managed with care, transparent pricing, and guaranteed quality from start to finish.

01 / EXTENSION

10–16 Weeks

architecture

House Extensions

Rear, side-return, and wrap-around extensions designed to create bright, open-plan living space for your family.

Key Deliverables

check_circleStructural steel beam installation & solid foundations
check_circleBi-fold doors, sliding glass doors & rooflights
check_circlePlanning permission & Party Wall agreement support

Guide PriceFrom £58,000 + VAT

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02 / ROOF SPACE

8–12 Weeks

roofing

Loft Conversions

Dormer, mansard, and hip-to-gable loft conversions tailored to maximize headroom and add spacious new bedrooms and bathrooms.

Key Deliverables

check_circleBespoke matching staircases, banisters & spindles
check_circleMaster bedrooms with en-suite bathrooms & insulation
check_circlePermitted Development & planning application handling

Guide PriceFrom £52,000 + VAT

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03 / TURNKEY RESTORATION

16–26 Weeks

apartment

Full Property Refurbishments

Complete interior and exterior renovations for houses and flats. Layout changes, structural remodeling, and modern upgrades throughout.

Key Deliverables

check_circleFull electrical rewiring, new plumbing & heating systems
check_circleSoundproofing, subfloor leveling & insulation
check_circleSash window restoration & energy efficiency upgrades

Guide PriceFrom £110,000 + VAT

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04 / BESPOKE JOINERY

4–8 Weeks

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Kitchen & Bathroom Renovations

Bespoke fitted kitchens, luxury bathrooms, and walk-in wet rooms built to your personal taste and lifestyle.

Key Deliverables

check_circleQuartz, marble, and granite worktop installation
check_circleWaterproof walk-in showers & underfloor heating
check_circleCustom kitchen cabinets, islands & appliance fitting

Guide PriceFrom £24,000 + VAT

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05 / STRUCTURAL RIGOUR

3–7 Weeks

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Roofing & Structural Work

Structural wall removals, steel beam installations, chimney breast removals, and new slate or flat roof installations.

Key Deliverables

check_circleLoad-bearing wall removal & steel beam installation
check_circlePitched slate & tile re-roofing with lead flashings
check_circleDurable GRP fibreglass flat roofs with long warranties

Guide PriceFrom £16,500 + VAT

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06 / PRECISION SURFACES

2–4 Weeks

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Flooring & Tiling

Professional installation of engineered wood, herringbone parquet, porcelain tiles, and warm underfloor heating.

Key Deliverables

check_circleHerringbone, chevron & wide plank wood flooring
check_circleLarge-format porcelain, ceramic & marble tiling
check_circleSubfloor leveling screed & underfloor heating systems

Guide PriceFrom £95 / m² + Materials

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07 / FINE FINISHES

2–5 Weeks

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Painting & Decorating

Interior and exterior decorating, smooth plastering, spray finishes, and period woodwork restoration.

Key Deliverables

check_circleHigh-quality paints including Farrow & Ball and Little Greene
check_circleDust-free surface preparation and spray woodwork finishes
check_circleRestoration of ceiling roses, cornices & plaster mouldings

Guide PriceFrom £8,500 + VAT

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08 / FABRICATION & MASONRY

Project Specific

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General Building & Joinery

Bespoke joinery, fitted wardrobes, brickwork repairs, damp proofing, and general building services by certified tradesmen.

Key Deliverables

check_circleCustom fitted wardrobes, alcove shelving & internal doors
check_circleBrickwork repointing, brick matching & chimney repairs
check_circleDamp proofing treatments & foundation works

Guide PriceBespoke Quotation

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How We Work

Our 4-Step Process: From Initial Survey to Handover

We keep your project organized, transparent, and on schedule at every step.

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Feasibility & Survey

We visit your property for a detailed survey, review planning permission rules, check Party Wall requirements, and assess feasibility.

Milestone: Clear Feasibility & Cost Assessment

02draw

Specification & Costing

Fully itemized quote with clear scope of works, structural engineer plans, realistic timelines, and an agreed fixed-price contract.

Milestone: Agreed Fixed-Price Contract

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Construction & Build

Hands-on daily management by your dedicated project manager. Qualified Gas Safe and NICEIC tradespeople on site with weekly progress updates.

Milestone: Weekly Progress Updates

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Final Inspection & Handover

Thorough quality checks, Local Authority Building Control completion certificate, and your 10-year insurance-backed warranty pack.

Milestone: Completion Certificate & 10-Yr Warranty

Pricing Guide

Estimated Starting Costs & Packages

Guide prices based on recent London home extensions, lofts, and refurbishment projects.

Tier 014–6 Weeks

Room / Single Floor Renovation

Ideal for master bedroom upgrades, kitchen renovations, luxury wet rooms, or new flooring throughout.

Starting from

£18,500 + VAT

checkElectrical & plumbing rewiring
checkSubfloor preparation & new flooring
checkDedicated Project Manager

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Most Requested

Tier 0210–14 Weeks

House Extension / Loft Conversion

Rear or side-return extensions, structural steel frames, or complete dormer/mansard loft conversions.

Starting from

£55,000 + VAT

checkStructural steel & engineer sign-off
checkBi-fold doors & rooflights included
checkBuilding Control & planning support
check10-Year Insurance Backed Guarantee

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Tier 0318–26 Weeks

Complete House Renovation

Full property transformation combining extensions, lofts, layout changes, and premium finishes throughout.

Starting from

£120,000 + VAT

checkComplete layout redesign & wall removals
checkCustom fitted kitchen & luxury bathrooms
checkDedicated full-time Project Manager
checkComplete new plumbing & electrical systems

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Areas We Cover

Delivering Quality Building Projects Across London

Our teams work across all London boroughs, handling local planning rules, building control, and site logistics with ease.

location_onKensington & Chelsea

location_onWestminster & Mayfair

location_onHammersmith & Fulham

location_onWandsworth & Battersea

location_onRichmond upon Thames

location_onIslington & Highbury

location_onCamden & Hampstead

location_onWimbledon & Putney

location_onSt John's Wood

JSTM Central Operations - Mayfair, London

Central Operations OfficeSuite A204 Vista Centre, 50 Salisbury Rd, Cranford, Hounslow TW4 6JQ

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Federation of Master BuildersVerified Member #88412

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Gas Safe RegisteredCertified Heating Engineers

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NICEIC Approved ContractorPlatinum Electrical Standard

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TrustMark EndorsedGovernment Verified Quality

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4.9 / 5.0 RatingTrustpilot Verified Reviews

Get Started

Book Your Free Site Survey & Quote

Speak with our experienced building team. We'll visit your property, assess feasibility, and provide clear advice and estimated costs with no obligation.

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JSTM Construction HQ • LondonSuite A204 Vista Centre, 50 Salisbury Rd, Cranford, Hounslow TW4 6JQ

phone

020 3576 2228

+44 7418 095006 (WhatsApp)

mail

info@jstmconstruction.com

schedule

Mon – Sat: 07:30 – 18:30 GMT

verifiedFast Response: Within 4 Business Hours

All enquiries are reviewed by our senior building team before your free site visit is scheduled.

verified_user10-Yr Warranty

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Enter your details and project type below. We will contact you to confirm a convenient date and time.