House extension services in Brentwood

House Extension Services in Brentwood

Professional House Extension Solutions for Brentwood Residents

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

Professional House Extensions in Brentwood

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

House extension project near Brentwood

A recent extension project in the Brentwood area

Local Expertise

Our Brentwood team brings extensive local knowledge and professional expertise to every project. We understand Brentwood'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 Brentwood 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 Brentwood

Brentwood 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 Brentwood

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 CM14 & surrounding postcodes

House Extension Costs in Brentwood (2026)

Guide prices for house extensions in the Brentwood 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 Essex 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 Brentwood

How Your Brentwood 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 Brentwood 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 Brentwood 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 Brentwood, 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 Brentwood space is ready to enjoy.

House Extension Services

Specializing in residential extensions across Brentwood, we provide tailored design solutions for every type of project. Our services include architectural design, planning applications, building regulations compliance, and construction drawings. We work closely with homeowners to create extensions that enhance their living space while maintaining the character and value of their property.

Planning Permission

Planning permission applications in Brentwood 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 Brentwood area

Extension completed in the Brentwood area

Building Control

Our Brentwood 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 Brentwood

With years of experience working across the Enfield area, our Brentwood 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 Brentwood

How much does a house extension cost in Brentwood?+
House extension costs in Brentwood 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 Brentwood property.
Do I need planning permission for a house extension in Brentwood?+
Many extensions in Brentwood 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 Brentwood property and advise on the best route — and handle the entire application if needed.
What types of house extensions can you build in Brentwood?+
We design and build all types of extensions in Brentwood: 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. Brentwood 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 Brentwood?+
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 Brentwood council?+
Yes — we have extensive experience submitting planning applications to the local authority covering Brentwood. 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 Brentwood do you cover?+
We cover Brentwood and all surrounding areas within a 20-mile radius. This means we can handle projects across the wider Brentwood area, with the same level of local knowledge and expertise you'd get from a firm based in Brentwood itself.

Ready to Start Your Brentwood Extension?

Transform your Brentwood home with our professional extension services. Contact us today for a free consultation and discover how we can help you create the perfect extension for your property. Our experienced team combines local knowledge with innovative design to deliver exceptional results that enhance your home's value and living space.

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