- HOME
- OUR SERVICES
- PLANNING DRAWINGS
- HOUSE EXTENSIONS
- LOFT CONVERSION
- OUTBUILDINGS & GARDEN ROOMS
- PERMITTED DEVELOPMENT & LAWFUL DEVELOPMENT PACKS
- HMO C4 & SUI GENERIS
- FLAT CONVERSIONS
- CHANGE OF USE
- LISTED BUILDING CONSENT
- NEW BUILD
- RETROSPECTIVE PLANNING
- PLANNING APPEALS
- PLANNING Vs PERMITTED DEVELOPMENT
- FULL PLANNING APPLICATIONS
- LONDON HUB
- BUILDING REG’S
- PRICING
- ABOUT US
- CONTACT US
SMARTePLANS® Experts in Planning!
T (0800) 6122 067
Email: team@smarteplansuk.com
SMARTePLANS®
167-169 Great Portland Street, London, W1W 5PF
House Extension Drawings & Plans
House Extension Drawings & Plans From £595
Planning Permission · Permitted Development · Building Regulations
Extension Planning Drawings £595
from
Existing and proposed architectural drawings, planning application preparation, submission and agent service.
- Extensions . Garages . Outbuilding . Conservatory
Building Regulations Drawings £595
From
Detailed technical drawings, construction details and specifications for Building Control assessment.
- Extensions . Garages . Outbuilding . Conservatory
Planning + Building Regs £995
SAVE £195
Combined planning and Building Regulations drawing packages, with application submission and liaison as quoted.
- Extensions . Garages . Outbuilding . Conservatory
Fees depend on the scope and complexity of the project. Council fees, Building Control charges, measured surveys and structural engineering calculations are excluded unless expressly included in the quotation.
Professional house extension drawings and plans from £595, prepared for planning permission, Permitted Development and Building Regulations. We provide detailed 2D and 3D architectural drawings for single-storey, two-storey, rear, side and wrap-around extensions, with fixed-fee pricing, fast turnaround and planning application submission and management where included in your package.
House Extension Drawings for Every Type of Extension
SMARTePLANS prepares professional architectural drawings for single-storey, double-storey, rear, side and wrap-around house extensions. Whether your project requires planning permission, qualifies for Permitted Development or needs detailed Building Regulations drawings, we can prepare the relevant plans, elevations, sections and supporting documents to progress your project.
Single Storey Rear Extension
Single storey extension
House extension regs drawings
Rear extension architectural design
Wraparound extension plans
House extension planning
Extension Drawings SMARTePLANS®
Side Extension
Planning Drawings SMARTePLANS®
Extension Building Regulations Drawings
House extension planning
Rear Extension Planning
SMARTePLANS®
house extension drawings
Extension Drawings SMARTePLANS®
Wrap around extension SMARTePLANS®
SMARTePLANS® 2026 Award
See What Your House Extension Drawings Include
Explore examples of our architectural drawings for house extensions, including existing and proposed floor plans, elevations, building sections and 3D visualisations. Our drawings are prepared specifically for each project and tailored to the requirements of the relevant planning or Building Control application.
What Drawings Do I Need for a House Extension?
House extension drawings typically include existing and proposed floor plans, elevations, roof plans and sections where necessary. These drawings illustrate the proposed development and support planning permission or Lawful Development Certificate applications. Where Building Regulations approval is required, additional technical drawings and specifications are generally prepared to address structural alterations, foundations, insulation, drainage, fire safety and other applicable requirements.
Why Choose SMARTePLANS® for Your Extension?
Fast, accurate architectural drawings
Planning & Permitted Development expertise
Fixed pricing with no hidden extras
Full application management with your local council
Building Regulations packs available
Types of Extensions We Cover
Single‑storey rear extensions
Double‑storey extensions
Side extensions
Wrap‑around extensions
Kitchen extensions
Orangery / sunroom extensions
What You Get
Existing drawings
Proposed drawings
Elevations
Roof plans
Site plan
Planning statement (if required)
PD compliance check
Full council submission
Extension Plans FAQ
Our house extension planning drawing packages start from £595, with clear, fixed-fee pricing. The final cost depends on the type and complexity of your extension and the level of service required. Request a free quote and we'll confirm the cost before any work begins.
Most planning applications require a set of scaled existing and proposed floor plans, elevations, site/location plans and, where relevant, roof plans and sections. We'll establish exactly what is required for your project and prepare the appropriate drawing package for submission.
Not always. Some house extensions can be carried out under Permitted Development rights, while others require a planning application or Prior Approval. You can find further guidance on house extensions and permitted development on GOV.UK. We'll assess your proposed extension and advise you on the appropriate planning route before proceeding.
Yes. We can prepare and submit your planning application to the local authority and act as your planning agent, managing the application and dealing with the council throughout the determination process where this service is included in your package.
In most cases, yes. Planning and Building Regulations are separate requirements. Planning deals primarily with whether the development is acceptable, while Building Regulations deal with matters such as structure, insulation, fire safety and construction standards. We can also prepare the detailed Building Regulations drawings required for your project.
Our streamlined digital service means we can typically prepare your initial planning drawings within 72 hours once we have all the information required to start your project. More complex projects may take longer, and we'll advise you of the expected timescale at the outset.
Start your extension drawings today — fixed price, fast turnaround.Trusted by 5,000+ homeowners ⭐⭐⭐⭐⭐
Our approval success rates speak for themselves, don't leave it to chance, contact us today!