Transform Your Home with Premium Bay Windows

Elevate your home with premium bay window installation from Bowalker. Our in-house installers measure and fit every bay window with precision, delivering improved natural light and long-term performance. All work is carried out to FENSA standards (Reg. 33081), with a 10-year insurance-backed guarantee covering every installation we complete.

Dimensions Max size 2.5M high x 1.5M wide
Thermally Broken As standard
Glass Astragal bars, Satin, Double Glazed

Professional Bay Windows Installation and Replacement Services

As a leading bay window installer founded in 2009, Bowalker provides premium bay window installation and replacement services for homeowners seeking high-performance glazing that improves kerb appeal, thermal efficiency and interior comfort. Our in-house team measures, supplies and fits splay bay, box bay, bow and single-end bay designs in timber-look uPVC, aluminium and timber. Every installation incorporates double or triple glazing, low-emissivity glass and thermally broken profiles to suit every architectural style and structural requirement.

Our installations incorporate multi-chambered profiles, PAS-24 compliant multipoint locking systems, EPDM weather seals and A-rated energy performance as standard. We work across Victorian, Edwardian and contemporary properties, fitting bay windows with casement or sash opening lights, Georgian astragal glazing bars and a full range of RAL powder-coated or foiled finishes to match existing joinery.

Call Bowalker on 01444 810 111 to arrange your free home consultation and receive a fixed-price quote. From initial measurement to final inspection, our in-house installers deliver a fully compliant service backed by FENSA registration (Reg. 33081) and a 10-year insurance-backed guarantee.

Materials

Timber
uPVC

Standard Hardware

Chrome
Satin
Gold Knob
Antique Black Knob

Standard Colours

Smooth White
Cream
Painswick Grey
Chartwell Green
Anthracite Grey
Irish Oak
Dual Colour
Paint to Order

Glass

Triple Glazed
Satin
Astragal Bars

Standard Layouts

Single
Double
Triple

Our Certifications And Professional Standards

Why Homeowners Choose Bowalker For Bay Windows Installation Services?

Homeowners choose Bowalker because every bay window installation is handled by our skilled in-house team with no subcontractors, no hidden costs and no compromise on quality. Founded in 2009, we manage every stage from initial survey to final fitting, backed by transparent fixed pricing, FENSA-registered compliance (Reg. 33081) and a 10-year insurance-backed guarantee. Our installations improve kerb appeal, increase natural light and support thermal efficiency with energy-efficient glazing, all delivered through a hassle-free, full-service experience.

10-year Insurance-backed Guarantee

Fensa Registered And Fully Compliant

Hassle-free, Full-service Experience

In-house Installers (No Subcontractors)

Fixed Pricing Guarantee, No Surprises

Types of Bay Windows We Install and Replace

At Bowalker, we install and replace splay bay windows tailored to suit modern, Victorian or Edwardian properties in uPVC, aluminium or timber frames. These windows feature a central pane with angled side panes set at 30 or 60 degrees, creating additional floor space, an abundance of natural light and an attractive external profile.

Our in-house installers ensure precise fitting with A-rated double or triple glazing, PAS 24-compliant locking systems and EPDM weather-resistant seals, delivering a bright, airy interior and enhanced kerb appeal.

A box bay window has sides that sit perpendicular to the house wall, creating a squared outward projection and a generous interior sill of approximately 250 to 600mm, ideal for seating, plants or decoration. We install and replace bespoke box bay windows in uPVC, aluminium or timber, matched to your property's style and structural requirements.

Our installers ensure precise fitting with A-rated double or triple glazing, multipoint locking and EPDM weather seals, providing increased natural light and enhanced kerb appeal.

We install and replace bow bay windows typically constructed with four, five or six equal-sized window panels to form a semi-circular or compass shape. This rounded design creates a panoramic view, maximises natural light and adds a distinctive architectural feature to both modern and period properties.

Our installations use A-rated double or triple glazing, thermally broken frames in uPVC, aluminium or timber, and PAS 24 compliant locking systems, delivering a bright, airy interior and increased floor space.

A segmented bow bay window uses smaller, more acutely angled panels than a standard bow window to create a semi-circular effect, offering panoramic views and an abundance of natural light. At Bowalker, our team designs, supplies and fits these windows in uPVC, aluminium or timber with A-rated double or triple glazing.

Multipoint locking and EPDM weather seals make them suited to both modern and period properties, delivering a bright interior and enhanced kerb appeal.

At Bowalker, we replace and install oriel bay windows, which extend from an upper floor and do not reach the ground, commonly used to enhance period properties and listed buildings, subject to planning and listed building consent where required. Our installers fit oriel windows in slimline aluminium, engineered timber or timber-look uPVC with A-rated double glazing.

Multipoint locking and weather-resistant seals deliver additional interior space, maximum natural light and enhanced kerb appeal.

A single-end bay window projects from a wall but is enclosed on one side, making it well suited to corner positions or where space allows only a partial bay. We replace and install bespoke single-end bay windows in uPVC, aluminium or timber at Bowalker, ensuring each window suits your property's style and structural requirements.

Our team provides precise fitting with A-rated double or triple glazing, PAS 24 compliant locking systems and EPDM weather seals, delivering increased natural light and additional interior space.

See Our Work In Action

What Are the Benefits of Installing Bay Windows?

Installing bay windows offers enhanced kerb appeal, improved ventilation, expanded living space, increased property value, abundant natural light and greater energy efficiency. Modern bay windows use high-performance glazing, multi-chambered frames and precision-fitted installations to reduce heat loss, improve ventilation, maintain indoor comfort and create a seamless appearance that complements both traditional and contemporary architecture.

Six key benefits of installing bay windows include:

Enhances Kerb Appeal

Creates a stylish outward projection that improves the property's exterior, adding architectural interest and charm.

Improves Ventilation

Multiple opening panes increase airflow, helping maintain a fresh and comfortable indoor environment.

Expansive Living Space

The outward extension adds interior space, ideal for window seats, reading nooks or additional storage.

Increases Property Value

Boosts overall property appeal and supports higher resale value through improved aesthetics, thermal performance and kerb appeal.

Abundant Natural Lighting

Allows sunlight to enter from multiple angles, brightening interiors and creating a welcoming atmosphere.

Energy Efficiency

Modern glazing and insulated frames reduce heat loss, maintain consistent indoor temperatures and lower energy costs.

How to Get Started With Bay Windows Installation and Replacement at Bowalker?

Getting started with bay window installation at Bowalker begins with a free consultation and no-obligation quote. Our in-house team assesses your property, recommends suitable designs from our full range including splay, box, bow, segmented bow and single-end bay windows, and ensures every specification aligns with your architectural style, energy-efficiency goals and performance requirements.

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Areas we Serve

Bowalker provides professional bay window installation services across Sussex, Surrey and London, delivering premium bay windows with precision and care. Our bay window installation team ensures consistent workmanship, reliable installation and ongoing aftercare and support for homeowners throughout these regions.

What Our Happy Customers Say

EXCELLENT

Based on 36 reviews

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Marchants Estate Agents Hassocks 2 weeks ago

Excellent service from a local independent company. Highly recommend.

Andy Clarke 3 days ago

I had replacement windows installed. Design and advice was good and cost was competitive. Installation was started in a good time to a good standard.

Abi Hosier a month ago

Bowalker have been incredibly helpful and provided me with extremely useful information about the windows and doors at a property I moved into, previously supplied by them. Great customer service, really recommend

steph park a month ago

Bowalker replaced all of our windows and patio doors in November. They are very efficient and got the job done in the pouring rain but did it quick and professionally. We had a couple of teething issues with the doors after completion and they did not hesitate to come out and rectify the issue. Excellent customer service and a friendly team. Would highly recommend

Nic Downer Edited 3 months ago

We had a total of 6 windows fitted at end of June 2025 (2 bathroom(frosted), 1 hallway,1 dining room and two big bay windows complete with 2 window boards). Took 5 days in total as bay windows were load bearing ,the window boards were not in warehouse so took extra time to arrive and fit , the silicone/mastic finish wasn’t great and they cut one end of a window board wrong , but after a telephone call a new team of fitters came out and rectified the mistakes of original fitters that we had noticed , a window pane had got scratched in delivery so they replaced that as well. This was a big job that entailed some mistakes but over time was rectified by bowalker windows by sending out another team of fitters to fix some minor mistakes of original fitters . We went on a recommendation from a work colleague who had used Bowalker windows in the past as were very good. Maybe just improve your fitters mastic silicone skills a bit more but is is an old house of 110 years and nothing is level in this house

Mark Fitzpatrick 4 months ago

As a property developer operating across Brighton and Hove, I rely on trusted trades who consistently deliver — and Bowalker Windows Ltd, led by Zack Newman, is one of those partners. We specify their windows across all our developments because their products meet the high standards our clients expect, installations are completed on schedule, and site coordination with our contractors is seamless. Zack is responsive, pragmatic, and straightforward about lead times and costs, which makes planning and handovers far easier. Their workmanship is excellent, energy-performance claims are reliable, and they stand behind their warranty. Competitive pricing, professional teams, and reliable aftercare mean we’ll continue to use Bowalker Windows on future projects. Highly recommended for any developer or home owners in the Brighton & Hove area.

mark Matthew 4 months ago

5 stars! I recently had all the windows in my home replaced by Bowalker Windows and couldn’t be happier with the result. From my very first contact I worked with Zack Newman — he was professional, knowledgeable, and transparent about pricing and timelines. The installation team arrived on time, worked efficiently, and left the house clean. The new windows look fantastic, operate smoothly, and have already made a noticeable difference in comfort and noise reduction. Excellent customer service from start to finish — I highly recommend Zack and Bowalker Windows to anyone looking for quality work and a hassle-free experience.

Graeme Edited 5 months ago

I am 9 years into our windows installation from Bowalker Windows. I emailed them on Sunday with an issue and by 3pm Monday afternoon they were at my home sorting the issue. This company's attitude to exceeding customer service and going the extra mile is in their DNA. These guys are just amazing from cradle to grave when it comes to windows and doors. I wouldn't go anywhere else. Simply fantastic.

Tatiana Gurova 6 months ago

The installation went quickly and without any problems. I recommended them as excellent specialists.

Joanna Steadman 6 months ago

We have used Bowalker on several occasions for replacement windows and doors and have always been pleased with the work, product price snd communication

Meet Our Team

Our team at Bowalker comprises highly skilled bay window installers who deliver premium installations with precision and care. All installers are part of our in-house team, ensuring consistent quality and accountability from consultation to completion. We are committed to exceptional customer satisfaction and consistently high standards, ensuring every installation enhances natural light, expands living space and delivers long-lasting performance.

Leaded Windows Project Gallery

Two anthracite sash windows in Hassocks

Ready To Get Started With Bowalker Bay Windows?

Enhancing your home with bay windows can instantly improve its light, space and overall aesthetic, creating a more inviting and stylish interior. Bowalker provides a full-service, hassle-free installation with a fully in-house team of bay window installers, premium glazing systems and a 10-year insurance-backed guarantee, ensuring lasting quality and performance.

Call 01444 810 111 today to book your free bay window consultation and receive a no-obligation quote. Our experienced bay window installation team handles every step with precision, ensuring your bay windows are perfectly fitted to maximise natural light, improve airflow and ensure long-term durability.

Frequently Asked Questions

What Are Bay Windows?

Bay windows are windows that project outward from a building, forming an interior recess or extended space with a central pane and angled or curved side panes in shapes such as splay, box, bow, segmented bow or single-end bays. This design increases natural light, enhances ventilation and adds extra living space, whilst improving the property’s exterior appearance.

How Much Does Bay Window Installation Cost?

Bay window installation costs in the UK range from £1,500 to £4,500 fully fitted, with most homeowners paying around £2,000 to £3,000 for a standard three-panel uPVC double-glazed bay. At Bowalker, our installation rate starts from £450 for bay windows under 5m², rising to £900 for larger bays over 5m², added transparently on top of your chosen window supply price with no hidden charges. The final cost varies depending on frame material, with uPVC being the most affordable and aluminium and timber commanding a higher price, alongside window size, glazing specification and whether any structural adjustments are required.

What Materials Are Bay Windows Made From?

Bay windows are made from materials such as uPVC, timber or aluminium, selected to complement both modern and period properties whilst providing durability, insulation and security. These materials are often combined with double- or triple-glazing and advanced sealing systems to improve thermal performance, energy efficiency and long-term reliability.

How Long Does Bay Window Installation Take?

Bay window installation typically takes 1 to 2 days per window when completed by a professional crew, though individual replacements into an existing opening can sometimes be completed within a single day. The exact duration depends on factors such as the removal of old frames, any structural adjustments required, the size of the window and weather conditions on the day.

What Guarantee Do You Provide on Bay Window Installation?

Bowalker Windows provides a 10-year insurance-backed guarantee on every bay window installation, ensuring lasting performance and complete peace of mind. All installations are FENSA-registered (Reg: 33081), confirming compliance with current Building Regulations for safety and thermal performance, with all certification and documentation handled on your behalf.

Do I Need to Be at Home During the Installation?

No, you do not need to be home for the bay window installation, as long as we have access to the property and your preferences are communicated in advance. Our fully in-house team of bay window installers will complete the work professionally, ensuring careful handling, security and installation in accordance with your specifications.

How Much Does It Cost to Replace Bay Windows?

Bay window replacement costs in the UK range from £1,800 to £3,500 for a standard three-panel unit, supplied and fitted, with most homeowners spending around £2,000 for a uPVC double-glazed bay. Aluminium frames generally start from around £1,550 and timber from £1,800, with costs rising depending on size, design complexity and finish. The final price depends on the number of panels, glazing specification and the condition of the existing frame and surrounding structure.

What Are the Maintenance Tips for Bay Windows?

Routine maintenance for bay windows includes cleaning the glass and frames regularly, checking seals for deterioration, lubricating moving parts, inspecting for signs of damage or draughts, applying timber treatment or repainting to wooden frames as needed and keeping drainage channels clear of debris. Following these steps helps preserve their appearance, functionality and energy efficiency over time.

What Is the Difference Between a Bay and Bow Window?

A bay window has a central pane with angled sides forming a polygonal projection, whereas a bow window uses multiple curved panes to create a rounded, panoramic appearance. Most bay windows have three sections (a central pane and two angled sides), whilst bow windows usually consist of four or more panels. Both styles increase natural light and add interior space, and Bowalker installs the full range across modern and period properties.

Bay Windows