Services for

House Extensions

What We Offer

Whatever you're building, we're here to help you take the first step with confidence.

Explore our range of services designed to help you move forward with confidence, wherever you're headed next.

House Extension Packs

Choose the level of architectural support that best suits your project.

Single Storey
Extension

Double Storey
Extension

✓

One Price. Any Extension.

Our House Extension Packs and prices apply to both single-storey and double-storey extensions, across a wide range of extension types.

✦

Designed Around Your Ambition

We do not want the package to limit your ideas. Our aim is to explore the possibilities and create an inspiring design that works within your budget.

Planning Pack 1

Planning Drawings Pack

A straightforward drawing package for clients who already have a clearly defined design brief.

£1045

Full 2D Measured House Survey
Existing Plans & Elevations
Architectural Design
Proposed Plans & Elevations
Planning Drawing Package in PDF Format
All Necessary Site Visits Included
Unlimited Direct Contact with Your Architect
Continuous Expert Design Advice
Unlimited Design Changes Prior to Planning

Enquire about Pack 1

Planning Submission Pack

A complete architectural planning drawing and application submission service.

£1,495

Everything Included in Planning Pack 1, plus
Review of Statutory & Planning Requirements
Collection & Review of Site Information
Planning Application Preparation
Planning Application Submission
Acting as Your Planning Agent / Consultant
Continuous Expert Planning Advice
Continuous Support Throughout the Planning Process
Liaison with the Local Planning Authority
Responding to Planning Officer Queries
Unlimited Design Changes During the Planning Process

Enquire about Pack 2

MOST COMPREHENSIVE

Planning Pack 3

Full 3D Design & Planning Pack

An enhanced architectural design service for clients who want to explore the full potential of their project.

£1,895

Everything Included in Planning Pack 2, plus
Comprehensive Evaluation of the Project Brief
In-Depth Architectural Design Studies
Pre-Planning Consultation
Exterior 3D Sketch Visualisation
Planning Strategy & Pre-Application Support
Planning Resubmission if Refused or Withdrawn*

Enquire about Pack 3

Please note:
(1)Local Authority planning application fees, pre-application fees, Ordnance Survey mapping, specialist consultant fees and other third-party costs are not included unless expressly stated.
(2)Structural engineering, specialist surveys and other consultant services may be required depending on the nature of the project.
(3)Planning permission cannot be guaranteed.
(4) Detailed drawings and information required for Building Regulations / Building Control approval are not included and are available as a separate service.

Compare All Planning Packages Hide Planning Package Comparison ▼

Compare Our Planning Packages

Compare the architectural design and planning services included within each package.

	Planning Pack 1 Planning Drawings Pack Architectural drawings and design support for clients with a clearly defined brief.	Most Popular Planning Pack 2 Planning Submission Pack A complete architectural planning and application submission service.	MOST COMPREHENSIVE Planning Pack 3 Full 3D Design & Planning Pack Enhanced architectural design, 3D visualisation and planning strategy.
Package Fee	£1,045	£1,495	£1,895
Project & Architect Support
All Necessary Site Visits Included i Site visits reasonably required for preparation and development of the architectural design service are included within the package.	✓	✓	✓
Unlimited Direct Contact with Your Architect i Direct communication with your Architect throughout the agreed architectural service.	✓	✓	✓
Continuous Expert Design Advice i Architectural design advice is provided throughout development of the agreed design and drawing package.	✓	✓	✓
Unlimited Design Changes Prior to Planning i Design revisions can be made during development of the proposal before the planning application stage.	✓	✓	✓
Measured Survey
Full 2D Measured House Survey i A measured survey of the relevant existing areas of the house is undertaken to provide information for preparation of the architectural drawings.	✓	✓	✓
Existing Architectural Drawings
Existing Plans & Elevations i Architectural plans and elevations are prepared to record the relevant existing arrangement and appearance of the property.	✓	✓	✓
Architectural Design
Architectural Design i Architectural design is developed in accordance with the client's agreed brief and project requirements.	✓	✓	✓
Proposed Plans & Elevations i Proposed architectural plans and elevations are prepared to illustrate the agreed design.	✓	✓	✓
Planning Drawing Package in PDF Format i The completed architectural drawing package is issued electronically in PDF format.	✓	✓	✓
Planning Services
Review of Statutory & Planning Requirements i Relevant statutory and planning requirements affecting the proposed development are reviewed.	×	✓	✓
Collection & Review of Site Information i Relevant available site and planning information is collected and reviewed as part of preparing the planning submission.	×	✓	✓
Location Plan / OS Map i A location plan is provided for the planning application. Third-party Ordnance Survey mapping costs may be separate.	×	✓	✓
Design Development for Planning i The architectural proposal is developed as required for preparation of the planning application.	×	✓	✓
Final Planning Drawings i The final architectural drawings required for the agreed planning submission are prepared.	Client drawing package	✓	✓
Planning Application Preparation i The planning application documentation included within the agreed scope is prepared for submission.	×	✓	✓
Planning Application Submission i The planning application is submitted to the relevant Local Planning Authority on your behalf.	×	✓	✓
Acting as Your Planning Agent / Consultant i We act as the planning agent and professional point of contact for the agreed planning application.	×	✓	✓
Continuous Expert Planning Advice i Professional planning advice is provided throughout the agreed planning process.	×	✓	✓
Continuous Support Throughout the Planning Process i Architectural and planning support continues during consideration of the submitted planning application.	×	✓	✓
Liaison with the Local Planning Authority i We communicate with the Local Planning Authority in connection with the submitted application where reasonably required.	×	✓	✓
Responding to Planning Officer Queries i We respond to reasonable planning officer enquiries concerning the agreed application.	×	✓	✓
Unlimited Design Changes During the Planning Process i Design revisions can be made during the agreed planning process where required in connection with progressing the application.	×	✓	✓
Enhanced Design & Planning Strategy
Comprehensive Evaluation of the Project Brief i A more comprehensive review of the client's objectives, opportunities, constraints and architectural aspirations is undertaken.	×	×	✓
In-Depth Architectural Design Studies i Additional architectural studies are undertaken to explore and develop the design potential of the project.	×	×	✓
Pre-Planning Consultation i Pre-application consultation is undertaken where appropriate before formal submission. Local Authority pre-application charges are separate.	×	×	✓
Exterior 3D Sketch Visualisation i An exterior 3D sketch visualisation is prepared to help communicate the architectural design.	×	×	✓
Planning Strategy & Pre-Application Support i Additional consideration is given to planning strategy and pre-application matters before formal submission.	×	×	✓
Planning Resubmission
Planning Resubmission if Refused or Withdrawn* i Where the application is refused or withdrawn, a planning resubmission is included within Pack 3, subject to the agreed scope and terms of appointment.	×	×	✓

Our Commitment to Your Project

All Necessary
Site Visits Included

All necessary site visits required for our architectural and planning service are included.

Unlimited &
Direct Contact

Unlimited direct contact with your Architect throughout the service.

Continuous Expert
Design Advice

Expert architectural design advice as your proposals develop.

Continuous Expert
Planning Advice

Professional planning guidance throughout the planning process.

Continuous Support
During Planning

We remain involved following submission and throughout the planning application process.

Unlimited Changes Prior
& During Planning

Unlimited design changes prior to submission and during the planning process, where required.

ARB-Registered
Architects

Services are undertaken by Architects registered with the Architects Registration Board.

CLEAR & TRANSPARENT
FIXED PRICES

Clear and transparent package pricing, so you know the architectural fee before you instruct us.

Areas We Cover

From our London office at Chiswick Park, we provide architectural design, planning and residential project services across a range of locations, with service availability tailored to the distance and requirements of each project.

London - Within 5 Miles of Chiswick Park

Full Service Coverage

All House Extension Packs and all Residential Scheme Packs.
Access to our London office and face-to-face meetings are available, together with virtual meetings, direct contact with Architects, free site visits, and continuous architectural and planning support throughout your project.

London - Within the M25

Extended Service Coverage

All House Extension Packs and all Residential Scheme Packs.
Access to our London office and face-to-face meetings are available by prior appointment. Virtual meetings, direct contact with Architects, free site visits, and continuous architectural and planning support are available throughout your project..

England & Wales

Selected Service Coverage

House Extension Pack 3 and Residential Scheme Packs 2 and 3.
Virtual meetings, direct contact with Architects, free site visits, and continuous architectural and planning support throughout your project.

Our London Office

Building 3 Chiswick Park, 566 Chiswick High Road, London, W4 5YA

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Consultant Line Architects Ltd
Chiswick Park, London W4 5YA

House Extensions

Planning Pack 1 - Planning Drawings Pack

£1,045.00

Planning Pack 2 - Planning Submission Pack

£1,495.00

Planning Pack 3 - Full 3D Design & Planning Pack

£1,895.00

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Contact us today to collaborate on innovative design solutions tailored to your vision.

House Extensions