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Alstruct construction blog

Blog & Insights

Tips, guides and inspiration for your next construction project in London.

Open-plan living space created by removing a load-bearing wall in a London home
Structural

Removing a Load-Bearing Wall

Costs, steel beams, Building Regulations and why it is never a DIY job for London homes.

Exterior of a completed London house extension
Extensions

Single-Storey vs Double-Storey Extension

Cost, space, planning and value compared, and how to choose the right one for your London home.

Completed loft conversion with a zinc roofline on a London terrace
Property Value

How Much Value Does an Extension or Loft Add?

What different projects add to a London home in 2026, the highest-return work, and how to avoid over-developing.

Open-plan kitchen extension with roof lights in a London home
Cost Guide

Kitchen Extension Costs and Ideas in London 2026

Rear, side-return, wraparound and double-storey prices for 2026, what is included, and the design ideas that make a kitchen extension work.

Completed single-storey rear extension on a London home opening to a garden
Planning

What You Can Build Without Planning Permission

Permitted development rights explained for London homeowners in 2026 — rear extensions, loft dormers, side extensions and outbuildings, plus the limits that catch people out.

London conservation area rear extension with matching brick and timber frames
Planning & Regulations

Conservation Area Extensions in London: The 2026 Homeowner's Guide

Planning a conservation area extension in London? What Permitted Development you lose, heritage statements, material rules, realistic costs and timelines per borough.

Victorian terrace exterior in Archway undergoing planning and extension works
Planning

Do I Need Planning Permission for a House Extension?

Permitted development vs full planning permission explained for London homeowners. Size limits, Article 4 Directions, conservation areas and how to apply.

Completed rear extension viewed from the garden
Project Planning

How Long Does a House Extension Take?

Full realistic timeline from planning to completion. Single-storey typically takes 4–6 months, double-storey 6–9 months. What causes delays and how to avoid them.

Loft conversion cost London 2026
Cost Guide

How Much Does a Loft Conversion Cost in London 2026?

Complete guide to loft conversion costs in London. Dormer from £45,000, Mansard from £60,000, Velux from £25,000. Real prices and what affects the cost.

Basement conversion London guide
Expert Guide

Basement Conversion London: Complete Guide 2026

Everything you need to know about basement conversions in London. Costs, planning rules, structural requirements, and what to expect from start to finish.

How to choose a builder in London
Expert Advice

How to Choose a Builder in London: Expert Checklist

How to find and choose the right builder for your London construction project. Accreditations to check, red flags to avoid, and questions to ask.

Victorian terrace renovation cost London 2026
Cost Guide

Victorian Terrace Renovation Cost London 2026

How much does it cost to renovate a Victorian terraced house in London? Full cost breakdown from structural work to fit-out, with real 2026 prices from completed projects.