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Latest articles from Oneoff Design

Designer and homeowner inspect drainage and threshold details beside a London side-return extension

Hidden costs of building an extension UK: where the money goes

Explore hidden costs of building an extension UK homeowners face, from design fees to approvals and structural work, with tips to plan your budget car...

· 10 min read
An architect and homeowner compare extension planning and building-regulations drawings in a London terrace

Cost of architectural drawings for a London extension

Explore the cost of architectural drawings for an extension in London, compare fee structures and drawing scopes, and find the right service for your...

· 12 min read
An architect discusses a percentage-fee estimate beside a model of a Cambridge Victorian terrace extension

Architect percentage fees in the UK: how much might you pay

Use an architect percentage fee calculator UK homeowners can trust, then compare scope, percentage, fixed and hourly fees to manage costs with confide...

· 11 min read
Architect and homeowner reviewing a completed Cambridge Victorian house extension

Architecture design for homes, businesses and industry

Explore architecture design for homes, businesses and industry. Compare styles, skills and priorities, and learn how CAD and 3D visualisation shape pr...

· 11 min read
Fixed fee architect costs in Cambridge for home projects

Fixed fee architect costs in Cambridge for home projects

Compare fixed fee architect Cambridge costs, inclusions and payment stages. See what affects extension and new-build fees, and how to agree a clear sc...

· 11 min read
How much might architect fees for a UK extension cost?

How much might architect fees for a UK extension cost?

Discover how much are architect fees UK 2026 for an extension, what affects costs, which project stages are covered and how to compare quotes with con...

· 11 min read
Architect fees for a London extension: how much do they cost

Architect fees for a London extension: how much do they cost

Discover architect fees for an extension in London, what affects costs, which stages are included and how to compare quotes for your home extension pr...

· 11 min read
Construction contract administration roles across Cambridge projects

Construction contract administration roles across Cambridge projects

Explore construction contract administration Cambridge: see how notices, claims, payment assessments, time extensions and handover help keep projects...

· 11 min read
Building Control Inspections in Cambridge: Costs and Approval

Building Control Inspections in Cambridge: Costs and Approval

Understanding building control inspections Cambridge: compare routes, costs and approval steps, and learn to prepare your extension for key checks in...

· 12 min read
Architect to Manage Builders in London: Fees and Upfront Costs

Architect to Manage Builders in London: Fees and Upfront Costs

Discover what an architect to manage builders in London may cost upfront, how fees relate to your build budget, and what project oversight should incl...

· 12 min read
Construction tender packages for Cambridge bids

Construction tender packages for Cambridge bids

Learn how to prepare a tender package for construction Cambridge bids, align drawings, pricing and quotes, resolve clarifications and submit a complet...

· 17 min read
Architects for House Extension Planning in Cambridge

Architects for House Extension Planning in Cambridge

Need an architect for planning permission Cambridge? Navigate permitted development, house extension drawings, and council approval with our expert gu...

· 16 min read