House extension services in Longfield

House Extension Services in Longfield

Professional House Extension Solutions for Longfield Residents

Free Site Visit
Fast Turnaround
Local Longfield Expertise
High Planning Approval Rate

Professional House Extensions in Longfield

Looking for professional house extension services in Longfield? Our experienced team of qualified architects provides comprehensive design solutions for residential projects across Longfield and the surrounding Enfield area. With deep local knowledge of Longfield's planning policies, building regulations, and architectural heritage, we deliver innovative designs that respect local character while meeting modern requirements.

House extension project near Longfield

A recent extension project in the Dartford area

Local Expertise

Our Longfield team brings extensive local knowledge and professional expertise to every project. We understand Longfield's unique architectural character, planning policies, and building regulations, ensuring your project progresses smoothly through the planning and building control processes. With years of experience working across the Enfield area, our architects have developed strong relationships with local planning authorities, building control officers, and other key stakeholders.

Planning & Regulations

Our Longfield team ensures your house extension project complies with all current planning policies and building regulations. We understand Enfield Council's specific requirements and can advise on the most appropriate approach for your project. From permitted development rights to full planning applications, we provide comprehensive support to ensure regulatory compliance while maximizing your development potential.

Property Types We Work With in Longfield

Longfield has a diverse housing stock and we have experience extending all property types in the area. Our architects adapt designs to suit the character and structure of each home, whether that means matching original brickwork on a period property or creating a contemporary contrast on a more modern home.

detached family homes
1930s semis
Victorian cottages
new-build estates
bungalows
barn conversions

Free Quote for Longfield

Tell us about your project and get expert advice within 24 hours.

Get a Free QuoteCall 020 3051 9430

Mon–Fri: 9am–5pm

Free site visit & consultation

No obligation quote

Covering DA3 & surrounding postcodes

House Extension Costs in Longfield (2026)

Guide prices for house extensions in the Dartford area. Every project is different — we provide a detailed, itemised quote after a free site visit.

Extension TypeTypical Cost
Single Storey Rear Extension£30k – £60k
Double Storey Extension£47k – £102k
Side Return Extension£21k – £43k
Wrap-Around Extension£51k – £111k
Loft Conversion (Dormer)£34k – £55k
Kitchen Extension£26k – £51k
Basement Conversion£68k – £170k
Garage Conversion£13k – £26k

Prices are guide figures for 2026 based on projects in the Kent area. PD = Permitted Development (no formal planning application needed in most cases). Actual costs depend on specification, site conditions, and scope.

Our Extension Services in Longfield

How Your Longfield Extension Project Works

From the first phone call to moving into your new space — here is what to expect at every stage.

Step 1

Free Consultation

We visit your Longfield property, discuss your vision, assess feasibility, and give you honest guidance on costs and planning routes.

Step 2

Design & Drawings

Our architects create detailed plans, 3D visuals, and construction drawings tailored to your Longfield home and how you want to live in it.

Step 3

Planning & Approvals

We prepare and submit your planning application, liaise with the local authority covering Longfield, and handle building regulations documentation.

Step 4

Construction

Our vetted builders bring the design to life. We oversee the build, conduct regular site visits, and manage quality at every stage.

Step 5

Completion & Sign-Off

Final inspections, building control sign-off, snagging checks, and handover — your new Longfield space is ready to enjoy.

House Extension Services

For residential projects in Longfield, we offer comprehensive extension services including house extensions, loft conversions, garage conversions, and wrap-around extensions. Our designs maximize space and value while respecting the local built environment. We use the latest CAD software and 3D visualization techniques to help you visualize your project before construction begins.

Planning Permission

Planning permission applications in Longfield require careful preparation and local knowledge. Our team has successfully submitted numerous planning applications across the Enfield area, achieving high approval rates through thorough preparation and understanding of local planning policies. We handle all aspects of the planning process, from initial feasibility studies to final approval.

Completed house extension in Longfield area

Extension completed in the Dartford area

Building Control

Our Longfield building control services include detailed construction drawings, structural calculations, fire safety assessments, and accessibility compliance reviews. We understand the specific building control requirements for extensions in the Enfield area and can advise on structural solutions, thermal performance standards, and sustainability requirements.

Why Choose Us in Longfield

With years of experience working across the Enfield area, our Longfield team combines creative design skills with practical project management, ensuring your project is delivered on time and within budget. We understand the unique challenges and opportunities presented by extensions in the area and can provide expert advice on the most appropriate design approach for your specific requirements.

Frequently Asked Questions About House Extensions in Longfield

How much does a house extension cost in Longfield?+
House extension costs in Longfield vary by type and size. Single storey rear extensions typically range from £30k – £60k, double storey extensions from £47k – £102k, and loft conversions from £34k – £55k. These are guide prices for 2026 — we provide an accurate, itemised quote after a free site visit to your Longfield property.
Do I need planning permission for a house extension in Longfield?+
Many extensions in Longfield can be built under permitted development rights without a formal planning application. This typically covers single storey rear extensions up to certain size limits. However, if your property is in a conservation area, is a listed building, or if the extension exceeds permitted development limits, a full planning application is needed. During our free consultation we assess your Longfield property and advise on the best route — and handle the entire application if needed.
What types of house extensions can you build in Longfield?+
We design and build all types of extensions in Longfield: single storey rear extensions, double storey extensions, side return extensions, wrap-around extensions, loft conversions (dormer, hip-to-gable, mansard), garage conversions, basement conversions, and kitchen extensions. Longfield has a mix of detached family homes, 1930s semis, Victorian cottages — we tailor every design to the specific property type.
How long does a house extension take in Longfield?+
Timelines vary by project: a single storey extension typically takes 3–4 months on site, a double storey 5–7 months, and a loft conversion 6–8 weeks. Before construction, the design and planning stage usually takes 8–12 weeks. We map out a detailed programme during your free consultation so you know exactly what to expect.
Do you handle planning applications with Longfield council?+
Yes — we have extensive experience submitting planning applications to the local authority covering Longfield. We prepare all drawings, design & access statements, and supporting documents, then manage communication with planning officers through to decision. Our knowledge of local policies helps avoid unnecessary delays or objections.
What areas near Longfield do you cover?+
We cover Longfield and all surrounding areas within a 20-mile radius. This means we can handle projects across the wider Dartford area, with the same level of local knowledge and expertise you'd get from a firm based in Longfield itself.

Ready to Start Your Longfield Extension?

Ready to start your house extension project in Longfield? Contact our expert team today for a free consultation and detailed project assessment. We offer competitive rates, professional service, and local expertise that ensures your project's success. Our Longfield extension services are designed to meet your specific needs, whether you're planning a rear extension, loft conversion, or complete home transformation.

Nearby Areas We Also Cover