--- title: "Builders Aylesbury | House Extensions & New Builds — DBD Builders Ltd" description: "Owner-led builders in Aylesbury with 26 years' experience. Fixed-price extensions, new builds, loft conversions and renovations across Buckinghamshire. 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You receive a fixed price for the scope agreed, so you know the figure before work starts. If you later change the plan and add scope mid-build, that extra work is quoted and charged separately." } }, { "@type": "Question", "name": "How quickly can I get a quote?", "acceptedAnswer": { "@type": "Answer", "text": "Surveys are free and normally turned around within a week. Call 07825 776763 or send the enquiry form and we will arrange a time to visit." } }, { "@type": "Question", "name": "Do you draw the plans and handle building control?", "acceptedAnswer": { "@type": "Answer", "text": "Plans are produced by the architect and structural engineer we work alongside — we do not draw them in-house. Building control is managed with us at every stage of the job through to final sign-off. Planning applications are normally submitted by the customer, usually via the architect on the job." } }, { "@type": "Question", "name": "Are you insured?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. DBD Builders Ltd carries £2,000,000 public liability cover and £10,000,000 employers' liability cover." } }, { "@type": "Question", "name": "Who carries out the electrics, plumbing and gas work?", "acceptedAnswer": { "@type": "Answer", "text": "Qualified electricians and Gas Safe plumbers we have worked alongside for more than 15 years. They are brought in on the regulated trades so every element of your project is covered properly." } }, { "@type": "Question", "name": "What happens if something goes wrong after the job is finished?", "acceptedAnswer": { "@type": "Answer", "text": "Tom stands behind the work. If an issue comes up after completion, he comes back and puts it right." } }, { "@type": "Question", "name": "How does payment work?", "acceptedAnswer": { "@type": "Answer", "text": "A deposit, stage payments through the build, and the balance on completion. Bank transfer is preferred." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.dbdbuilders.co.uk/" } ] } ] --- 18 Lambourne Avenue, Aylesbury, HP21 9NB [info@dbdbuilders.co.uk](mailto:info@dbdbuilders.co.uk) Monday–Friday, 8am–6pm [](https://www.facebook.com/share/1BerqSdacm/ "DBD Builders on Facebook")[](https://www.instagram.com/dbdbuilders "DBD Builders on Instagram")[](https://maps.app.goo.gl/kgiofxvxemVh1dTFA "DBD Builders on Google") [![DBD Builders Ltd](/__l5e/assets-v1/cc77554a-97f3-45bb-8fda-098c7cdae094/dbd-logo-light.png)](/) [Home](/)[About](/about) [Services](/services)[Service Areas](/areas) [Our Work](/our-work)[Contact](/contact)[07825 776763](tel:+447825776763)[Request Free Survey](/contact) [07825 776763](tel:+447825776763) Aylesbury & Buckinghamshire · 26 years' experience # Aylesbury's Trusted Builders & Extension Specialists, Fixed Price, One Team Twenty-six years on the tools, a directly-managed team of three to eight trades, and building control handled through to final sign-off. Free survey normally within a week. [Request Your Free Survey](/contact)[Call 07825 776763](tel:+447825776763) Fixed-price quotes · £2m public liability · £10m employers' liability 26 years Hands-on building experience 3–8 trades Team scaled to each project £2m / £10m Public & employers' liability cover Within a week Free survey and fixed quote What we're known for ## Two things sit at the heart of the business Extensions are the main focus of DBD Builders Ltd, alongside full new-build projects for private clients. Everything else we do supports those two. [![Red brick detached house extended and re-rendered by DBD Builders Ltd in Buckinghamshire](/__l5e/assets-v1/ca9efc01-86f4-470e-88a3-2efc66bccd46/service-hero-extensions.png) ### House Extensions Single and double-storey, side, rear and wrap-around extensions built to a fixed price. View service ](/services/extensions)[![Completed new build detached house with rendered elevations, slate roof and resin bound driveway by DBD Builders Ltd](/__l5e/assets-v1/34523578-dfe3-4351-87c6-643c9127ba5a/service-hero-new-builds.png) ### New Builds Complete private new-build homes, from groundworks and foundations through to final sign-off. View service ](/services/new-builds) The complete service ## One contractor for the whole job Roofing, landscaping, driveways, renovations and more, with electrics, plumbing and gas carried out by qualified trades we have worked alongside for over 15 years. [![Finished loft conversion bedroom with white panelled sloping ceilings and timber flooring by DBD Builders Ltd](/assets/service-hero-loft-conversions-shqZsiQI.jpg) ### Loft Conversions Turning unused roof space into a proper bedroom, office or bathroom, structurally done and signed off. View service ](/services/loft-conversions)[![Renovated bungalow with new roof, rendered walls and full Indian sandstone patio by DBD Builders Ltd](/__l5e/assets-v1/323e078e-d46b-47ff-aeac-77603308d36d/service-hero-home-renovations.png) ### Home Renovations & Refurbishments Whole-house renovations and refurbishments, all trades coordinated under one contractor. View service ](/services/home-renovations)[![roofing, timber structure and tiling completed by DBD Builders Ltd in Buckinghamshire](/__l5e/assets-v1/4ce84038-9519-41d5-b7d9-ea1f791fa57a/roofing-after-01.jpg) ### Roofing New roofs, re-roofing and roof repairs on pitched and flat roofs, as part of a project or standalone. View service ](/services/roofing)[![patio, paving and garden landscaping completed by DBD Builders Ltd in Buckinghamshire](/__l5e/assets-v1/c663140f-312d-46f1-a126-5b19a10ca096/landscaping-after-03.jpg) ### Landscaping Hard and soft landscaping that finishes the outside of a project properly. View service ](/services/landscaping)[![resin bound driveway completed by DBD Builders Ltd in Buckinghamshire](/__l5e/assets-v1/2316b499-f197-4ffc-9e40-61484ca35c82/resin-driveway-after-03.jpg) ### Driveways & Patios Block paving, resin and slabbed driveways and patios laid on properly prepared bases. View service ](/services/driveways-and-patios)[![Fitted kitchen with dark shaker units, timber worktops and bi-fold doors installed by DBD Builders Ltd](/__l5e/assets-v1/20dc9e78-683b-4567-8b5a-cb9bbcb2967a/service-hero-kitchen-and-bathroom-fitting.png) ### Kitchen Fitting Full kitchen installation including the electrics, plumbing and preparation behind the units. View service ](/services/kitchen-fitting)[![Fitted bathroom with freestanding oval bath, chrome floor-standing tap and dark grey large format tiling by DBD Builders Ltd](/__l5e/assets-v1/ed5a7033-6880-4a03-a2f0-9e8ce09e99e8/bathroom-freestanding-bath.jpg) ### Bathroom Fitting Bathrooms, en-suites and cloakrooms fitted with the waterproofing, plumbing and electrics done properly. View service ](/services/bathroom-fitting)[![Beam and block foundation slab with brickwork, drainage and setting out levels by DBD Builders Ltd](/__l5e/assets-v1/3cffb927-9e9d-4c60-9ecb-17745ce246ae/groundworks-foundation-slab.png) ### Groundworks & Foundations Excavation, foundations and drainage — the part of the job nobody sees and everything depends on. View service ](/services/groundworks-and-foundations)[![Detached house with brick and cladding elevations and new tarmac driveway completed by DBD Builders Ltd](/__l5e/assets-v1/297d3f07-7802-422a-b5ab-de48cba2fb0d/garage-conversion-exterior.png) ### Garage Conversions Converting an under-used garage into a warm, usable, building regulations compliant room. View service ](/services/garage-conversions)[![Finished ceiling with recessed LED downlights and roof lanterns wired and installed by DBD Builders Ltd](/__l5e/assets-v1/1415dcec-8747-4ee2-9ca1-f8b6efe41a07/service-electrical-lighting.jpg) ### Electrical Work Carried out by a qualified electrician we have worked alongside for over 15 years. View service ](/services/electrical-work)[![Wet underfloor heating pipework clipped out over insulation before screeding by DBD Builders Ltd](/__l5e/assets-v1/4809f759-cd8f-4c42-a686-7d14936c8f2d/service-plumbing-ufh.png) ### Plumbing & Gas Handled by a Gas Safe plumber from the same team we have used for over 15 years. View service ](/services/plumbing-and-gas) Why homeowners choose DBD ## A builder who is still on site, still answering the phone Tom Dobson has been building since he left school — joinery at college first, then years in his father's building company picking up every other trade along the way. Twenty-six years later he still runs the jobs himself, with a team of three to eight tradespeople scaled to the stage of the project. That matters because the person quoting your job is the person running it. Nothing is passed to a site manager you have never met, and nothing is sold to you by someone who will not be there when the ground opens up. Work is priced as a fixed quote. If an issue ever comes up after completion, Tom comes back and puts it right — not because a contract forces it, but because that is how the business has lasted this long. [More about DBD](/about)[Request Free Survey](/contact) ![Rear of a white rendered house with bi-fold doors, aluminium pergola and raised sandstone patio steps built by DBD Builders Ltd](/__l5e/assets-v1/4bc51c9d-9620-488d-9dab-76d9f0fca812/rear-extension-pergola.jpg) How it works ## Four steps from first call to final sign-off No mystery, no drawn-out sales process. You know what happens next at every stage. 1. 01 ### Free survey Tom visits, measures up and talks through what you actually want the space to do. No charge, no obligation. 2. 02 ### Fixed price quote Normally back with you within a week. A fixed price for the scope agreed, so the figure you see is the figure you pay. 3. 03 ### Design & approvals Where drawings or calculations are needed, we work alongside our architect and structural engineer. Building control is involved from the start. 4. 04 ### Build & sign-off A team of three to eight trades scaled to the stage of the job, stage payments as we go, and building control sign-off at the end. Recent work ## Projects across Aylesbury and Buckinghamshire [View our work](/our-work) ![Rear extension with bi-fold doors and louvred aluminium pergola over a raised patio by DBD Builders Ltd](/__l5e/assets-v1/9e943e82-3a10-480a-b83d-c00f1db74058/rear-extension-pergola-2.jpg) Rear extension & pergola Buckinghamshire ![Side garden with large format porcelain paving and timber sleeper planters built by DBD Builders Ltd](/__l5e/assets-v1/6f1bf52f-58dc-4099-825f-dfbe9c85c29d/garden-planters-porcelain-patio.jpg) Porcelain patio & planters Buckinghamshire ![Full width single storey rear extension with sliding doors on a white rendered house by DBD Builders Ltd](/__l5e/assets-v1/528c3c15-722e-43a4-9670-70cf54b1d858/rear-extension-white-render.jpg) Full width rear extension Aylesbury ![Landscaped rear garden with new lawn, brick retaining wall and Indian sandstone patio by DBD Builders Ltd](/__l5e/assets-v1/cd3378bd-fbb9-45d5-a0ff-762c76b6e579/landscaped-garden-sandstone.jpg) Garden landscaping Buckinghamshire ![New build detached bungalow with slate grey roof and Indian sandstone patio built by DBD Builders Ltd](/__l5e/assets-v1/9615b322-a661-4df2-98d1-da6dca34d05b/new-build-bungalow-sandstone-patio.jpg) New build bungalow Buckinghamshire ![Open plan kitchen extension with dark shaker units, oak worktops, roof lights and bi-fold doors by DBD Builders Ltd](/__l5e/assets-v1/59accf00-9b5f-4f4e-a33c-a8dd1bfc444e/open-plan-kitchen-extension-dark-units.jpg) Open plan kitchen extension Aylesbury ![Wraparound rear extension with tiled roof, roof lights and full height aluminium glazing by DBD Builders Ltd](/__l5e/assets-v1/b6c37682-903a-4974-8aa1-7a68ff2379ff/wraparound-rear-extension-aerial.jpg) Wraparound rear extension Buckinghamshire ![Two storey rendered rear extension with French doors and landscaped garden by DBD Builders Ltd](/__l5e/assets-v1/6aa6f77e-700a-44a6-a705-35dd79377806/two-storey-rendered-extension-garden.jpg) Two storey rear extension Buckinghamshire Areas we cover ## Aylesbury, the Chilterns and the surrounding towns Based in Aylesbury and working throughout Buckinghamshire, including the higher-value areas of Beaconsfield, Gerrards Cross and Amersham. [Aylesbury(HQ) ](/areas/aylesbury)[High Wycombe](/areas/high-wycombe)[Beaconsfield](/areas/beaconsfield)[Gerrards Cross](/areas/gerrards-cross)[Amersham](/areas/amersham)[Chesham](/areas/chesham)[Great Missenden](/areas/great-missenden)[Wendover](/areas/wendover)[Princes Risborough](/areas/princes-risborough)[Tring](/areas/tring)[Leighton Buzzard](/areas/leighton-buzzard)[Marlow](/areas/marlow) What clients say ## Reputation built one project at a time Feedback from DBD clients is collected on our Google Business Profile. Reviews appear here automatically as they are published — we don't publish anything we can't attribute to a real customer. [Read & leave a Google review](https://g.page/r/Cdj9EeHMlD-DEBM/review) Before you commit ## Questions homeowners ask us first Straight answers, so you know exactly how we work before picking up the phone. [Call 07825 776763](tel:+447825776763) How much does an extension cost in Aylesbury? Every extension is priced individually after a free survey. You receive a fixed price for the scope agreed, so you know the figure before work starts. If you later change the plan and add scope mid-build, that extra work is quoted and charged separately. How quickly can I get a quote? Surveys are free and normally turned around within a week. Call 07825 776763 or send the enquiry form and we will arrange a time to visit. Do you draw the plans and handle building control? Plans are produced by the architect and structural engineer we work alongside — we do not draw them in-house. Building control is managed with us at every stage of the job through to final sign-off. Planning applications are normally submitted by the customer, usually via the architect on the job. Are you insured? Yes. DBD Builders Ltd carries £2,000,000 public liability cover and £10,000,000 employers' liability cover. Who carries out the electrics, plumbing and gas work? Qualified electricians and Gas Safe plumbers we have worked alongside for more than 15 years. They are brought in on the regulated trades so every element of your project is covered properly. What happens if something goes wrong after the job is finished? Tom stands behind the work. If an issue comes up after completion, he comes back and puts it right. How does payment work? A deposit, stage payments through the build, and the balance on completion. Bank transfer is preferred. Where we are ## Based in Aylesbury, working across Buckinghamshire DBD Builders Ltd 18 Lambourne Avenue, Aylesbury, HP21 9NB [07825 776763](tel:+447825776763) [info@dbdbuilders.co.uk](mailto:info@dbdbuilders.co.uk) Monday 8am – 6pm Tuesday 8am – 6pm Wednesday 8am – 6pm Thursday 8am – 6pm Friday 8am – 6pm Saturday Closed Sunday Closed ## Builders in Aylesbury and across Buckinghamshire DBD Builders Ltd is an established building and construction firm based in Aylesbury, serving homeowners throughout Buckinghamshire. The business is led by owner Tom Dobson, who trained in joinery at college before working in his father's building company and picking up a full range of trades along the way. Today he leads a dedicated team of between three and eight tradespeople, scaled to suit each project and each stage of the build. House extensions in Aylesbury are the heart of the business — single-storey rear extensions, double-storey side extensions and wrap-around schemes that change how a whole house works. Alongside extensions, DBD delivers full new-build projects for private clients across Buckinghamshire, taking a site from groundworks and foundations through the structural shell, roofing and internal fit-out to a completed, signed-off home. The complete building service also covers loft conversions in Aylesbury, garage conversions, home renovations across Buckinghamshire, roofing, landscaping, driveways and patios, kitchen and bathroom fitting, and groundworks and foundations. Plumbing, gas and electrical work is carried out by trusted subcontractors Tom has worked alongside for more than fifteen years, so the regulated trades are always handled by qualified specialists. For structural and design work, DBD collaborates with an architect and a structural engineer, and manages building control at every stage of the job through to final sign-off. Planning applications are normally submitted by the customer, usually through the architect appointed on the project. That division of responsibility is made clear at survey stage so nothing falls between two parties later on. Work is priced as a fixed quote following a free survey, which is normally turned around within a week. If the plan changes mid-build and scope is added, that additional work is quoted separately rather than absorbed quietly. Payment runs as a deposit, stage payments through the job and the balance on completion, with bank transfer preferred. Positioned at the higher end of the market, DBD serves Aylesbury, High Wycombe, Leighton Buzzard, Amersham, Gerrards Cross, Beaconsfield, Chesham, Tring, Wendover, Princes Risborough, Great Missenden and Marlow. The business is fully insured with £2m public liability and £10m employers' liability cover, and Tom stands firmly behind every project — if an issue arises after completion, he returns to put it right. To get started, call [07825 776763](tel:+447825776763) or request a free survey and we will arrange a time to visit. ## Ready to price your project properly? Free survey, normally within a week, followed by a fixed price for the scope agreed. No pressure, no sales visit — just a builder who has been doing this for 26 years. [Request Free Survey](/contact)[Call 07825 776763](tel:+447825776763) ![DBD Builders Ltd](/__l5e/assets-v1/cc77554a-97f3-45bb-8fda-098c7cdae094/dbd-logo-light.png) Extensions, new builds and complete building work across Aylesbury and Buckinghamshire. Owner-led by Tom Dobson, with 26 years on the tools. [](https://www.facebook.com/share/1BerqSdacm/ "DBD Builders on Facebook")[](https://www.instagram.com/dbdbuilders "DBD Builders on Instagram")[](https://maps.app.goo.gl/kgiofxvxemVh1dTFA "DBD Builders on Google") ## Services - [House Extensions](/services/extensions) - [New Builds](/services/new-builds) - [Loft Conversions](/services/loft-conversions) - [Home Renovations & Refurbishments](/services/home-renovations) - [Roofing](/services/roofing) - [Landscaping](/services/landscaping) - [Driveways & Patios](/services/driveways-and-patios) - [Kitchen Fitting](/services/kitchen-fitting) - [Bathroom Fitting](/services/bathroom-fitting) - [Groundworks & Foundations](/services/groundworks-and-foundations) - [Garage Conversions](/services/garage-conversions) - [Electrical Work](/services/electrical-work) - [Plumbing & Gas](/services/plumbing-and-gas) ## Areas - [Aylesbury](/areas/aylesbury) - [High Wycombe](/areas/high-wycombe) - [Beaconsfield](/areas/beaconsfield) - [Gerrards Cross](/areas/gerrards-cross) - [Amersham](/areas/amersham) - [Chesham](/areas/chesham) - [Great Missenden](/areas/great-missenden) - [Wendover](/areas/wendover) - [Princes Risborough](/areas/princes-risborough) - [Tring](/areas/tring) - [Leighton Buzzard](/areas/leighton-buzzard) - [Marlow](/areas/marlow) ## Contact DBD Builders Ltd 18 Lambourne Avenue Aylesbury HP21 9NB [07825 776763](tel:+447825776763) [info@dbdbuilders.co.uk](mailto:info@dbdbuilders.co.uk) Monday–Friday, 8am–6pm £2m public liability · £10m employers' liability © 2026 DBD Builders Ltd. All rights reserved. [About](/about)[Privacy Policy](/privacy-policy)[Cookie Policy](/cookie-policy)[Terms & Conditions](/terms-conditions)www.dbdbuilders.co.uk [Call 07825 776763](tel:+447825776763)[Free Survey](/contact) We use essential cookies to run this site, plus optional ones for the chat widget and embedded map. [Cookie policy](/cookie-policy) AcceptReject