They add two complete floors of living space. They require careful planning. They demand professional oversight. Understanding what comprehensive architectural services include helps you choose partners who will deliver successful projects.

What Double Storey Extension Architectural Services Include

Professional architectural services for double storey extensions include complete project management from initial concept through to final completion. This integrated approach prevents problems that arise when separate professionals work independently, without a shared vision and execution.

Initial assessment services evaluate your property thoroughly. Architects visit. They understand existing conditions. They identify structural constraints. They recognize opportunities. They assess ground conditions. They evaluate what’s actually possible on your specific property. They produce detailed reports showing findings and recommendations.

Planning strategy and preparation services handle application preparation and submission. London architects assess whether Planning Permission is required. They determine likely Planning Committee objections given your neighborhood and design. They proactively prepare applications to address those concerns. They present designs that emphasize how extensions respect the neighborhood character. 

London-Specific Double Storey Expertise

Expert London architects understand what Planning Committees typically approve. They know which neighborhoods accept bold contemporary design. Those who prefer sympathetic traditional approaches. Which resist visual change entirely. They design accordingly.

They understand London’s ground conditions. In some areas, clay soil requires different foundations than chalk or sand. 

Architectural Service	What’s Included	Timeline	Cost Range	Outcome
Property Assessment	Detailed site evaluation	1-2 weeks	£500-1500	Understanding feasibility
Concept Design	Multiple design options	4-6 weeks	£2500-4500	Direction selection
Detailed Design	Construction-ready drawings	4-6 weeks	£3000-5500	Contractor clarity
Planning Services	Application & approval	8-12 weeks	£3000-7500	Planning Permission
Building Regs Coord	Compliance & inspections	8-12 weeks	£3000-5500	Regulatory approval
Structural Coordination	Engineering integration	3-6 weeks	£2000-4000	Structural soundness
Tender & Selection	Contractor evaluation	2-4 weeks	£1500-3000	Quality contractor
Site Supervision	Quality oversight	Ongoing	£100-150/day	Consistent quality
Project Management	Complete coordination	12-18 months	£150-250/day	Successful completion
Full Integrated Service	Everything included	12-18 months	£18000-32000	Complete solution

Double Storey Design Excellence

Excellent double storey architectural services deliver designs that enhance properties. Extensions look right on existing buildings. Materials match appropriately. Proportions work well. Internal layouts function efficiently.

Roof design is crucial. Double storey extensions have a significant visual impact. Roof design determines much of that visual character. Expert architects design roofs that integrate with existing buildings. Hip roofs integrate better than gable roofs. Consistent materials help integration. Thoughtful proportions create visual harmony.

Fenestration design matters greatly. 

Double Storey Extension Cost in London

Double-storey extensions in London are significant investments that can dramatically transform properties. Understanding realistic costs helps you budget appropriately for your project.

In central London, double-storey extensions typically cost between £ 2,800 and £ 4,500 per square meter. For a 40-square-meter extension, construction costs range from 112000 to 180000. Adding a 10-15 percent professional fee and a 10 percent contingency, the total project cost likely ranges from 145000 to 230000.

In outer London, Double storey extensions costs are moderately lower. Typically, 2200 to 3500 per square meter. For a 40-square-meter extension, the total project cost may range from 115000 to 180000.

Multiple factors affect pricing. Ground conditions matter significantly. Good ground costs less than poor ground, which requires special foundations. Building condition affects costs. Properties in good condition cost less than buildings with complications.

Design complexity affects pricing. Simple rectangular extensions cost less than complex shapes. Material choices matter. Matching existing London brick costs more than standard options.

Extension Architecture: Double Storey Specialists

They deliver quality outcomes. Extensions enhance properties. They function beautifully. They add substantial value. They complete on time and within budget.

For your double storey extension project in London, Extension Architecture provides the comprehensive architectural services you need. Contact them for consultation on transforming your London property.