RAPTOR ROOFING & CONSTRUCTION LTD

Extend Your Living Space House Extensions in St Albans

Looking to add living space without moving? A well-built extension can give usable rooms and keep your current address. We carry out the roofing, brickwork and carpentry an extension needs so the new area is structurally sound and weatherproof. Tell us what you want to achieve and send any approved drawings or photos so we can advise the next practical step for your property in St Albans.

DISCUSS YOUR PROJECT EXPLORE SERVICES
House Extensions in St AlbansHERTFORDSHIRE / ESSEX / LONDON

AN INTRODUCTION / 06

Practical House Extensions Designed for Growth

Expanding your home should solve a space problem, not create a maintenance headache. We focus on the construction work that makes an extension durable and ready for finishing trades.

Planning an extension brings three practical questions: access, foundations and how the new roof will tie into the existing one. We handle the roofing adaptations, external brickwork and internal carpentry that turn approved drawings into a watertight, structurally secure shell. Arrange design and planning services separately; once you have drawings and any permissions, we’ll outline the trade work required and the sequence we’d use on site. Many homeowners choose this route to avoid moving while keeping existing utility layouts intact.

EXPLORE THE OPTIONS

OUR SERVICES / 06

Extension Types We Cover

Choosing the right extension type affects foundations, roof junctions and internal joinery. We work from client‑supplied drawings to carry out the brickwork, roofing and carpentry stages for single‑storey, double‑storey, rear, side and wraparound extensions. Before we start on site, we advise on access, material handling and likely points where a structural engineer’s input may be required.

01 / 05HOUSE EXTENSIONS

Single-Storey Extensions

A single‑storey extension usually enlarges a ground floor area such as a kitchen or family room. We build foundations, lay blockwork or brick skins, and construct the roof whether it is a flat, pitched or lantern style specified on your drawings. Internally we fit joists, subfloors and frames for windows and doors so the space is ready for plumbing, electrics and finishes. Early planning of deliveries and scaffold locations helps reduce disruption.

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02 / 05HOUSE EXTENSIONS

Double-Storey Extensions

Double‑storey work increases living space vertically and involves new foundations, loadbearing walls and roof reconfiguration. We construct the external masonry, tie new floors into existing structures and alter roof timbers to integrate the upper storey. Because vertical extensions interact with existing foundations and rooflines, we coordinate with any structural engineer’s details and manage scaffolding and material sequencing to maintain site safety and continuity between the old and new building fabric.

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03 / 05HOUSE EXTENSIONS

Rear Extensions

Rear extensions open up ground‑floor living space and often create open‑plan kitchen/dining areas. We construct foundations appropriate to the soil conditions shown in your plans, build external walls, and finish the roof connections to preserve weatherproofing. Work also includes routing rainwater and adapting existing gutters. Where access is limited from the front, we plan deliveries and waste removal around the rear access to keep the site functioning efficiently.

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04 / 05HOUSE EXTENSIONS

Side Extensions

Side extensions widen the footprint and can include garages, utility spaces or additional ground‑floor rooms. We ensure new masonry aligns with boundary constraints and build roofs that either tie into the house or sit as a distinct form depending on your drawings. Critical tasks include assessing drainage reroutes, securing scaffold where neighbours’ boundaries are close, and installing internal frames and floor structures to match the rest of the home.

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05 / 05HOUSE EXTENSIONS

Wraparound Extensions

A wraparound combines rear and side builds to produce a larger, integrated footprint. We sequence foundations, wall construction and roof junctions carefully to avoid weather exposure to newly completed areas. Work involves more complex brick bonding, stepped foundations where levels change, and coordinated carpentry to integrate new openings. Planning waste containment and material access early helps minimise disruption across the wider footprint of these projects.

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OUR PROCESS / FOUR STAGES

Our Extension Process

A clear, staged approach keeps an extension project manageable. We start with a practical site review, then follow a set sequence of groundworks, masonry, roof works and carpentry so the shell is watertight and ready for fit‑out. At each stage we confirm access, material needs and where specialist input may be required.

  1. STAGE / 0101 — 04
    01

    Initial Assessment

    Send any drawings, photos and access notes when you first contact us so we can spot obvious constraints such as narrow side access, neighbour boundaries or limited space for skips and scaffold. Where drawings are unavailable, we’ll advise what a designer should include so the trade estimate reflects the work we’ll carry out. That early exchange reduces surprises and helps produce a realistic, itemised proposal.

  2. STAGE / 0202 — 04
    02

    Foundation and Brickwork

    Once plans are approved, we prepare the site, excavate and form foundations to the specification given by structural calculations or standard detail. Brickwork and blockwork follow to form external walls and openings. During this phase we tie new masonry to existing walls, maintain damp‑proof courses and position any lintels and movement joints specified on the drawings to protect long‑term durability.

  3. STAGE / 0303 — 04
    03

    Roofing Integration

    Roofing work involves adjusting or extending the existing roof and installing new coverings, flashings and drainage to make the new area weatherproof. We set out proper fall for water, fit lead or upstands where required and match tile or slate profiles where possible. Good sequencing with the brickwork phase prevents exposed masonry and allows internal trades to proceed once the shell is secure.

  4. STAGE / 0404 — 04
    04

    Carpentry and Finishing

    Carpentry includes floor joists, roof joists, stud partitions, window and door frames and external fascia work as called for by the drawings. We ensure openings are squared, floors are levelled and structural timbers are fixed to current standards so subsequent trades can install services and finishes. We also manage on‑site protection to the existing house to limit damage during works.

WHY CHOOSE RAPTOR / WHAT MATTERS

Why Choose Our Trades

An extension succeeds when the structural frame, roof and external walls are delivered in the right sequence. We focus on the trades that create that shell and coordinate with designers and other contractors so the project proceeds logically and safely.

01

Integrated Trade Coordination

Extensions involve closely linked trades and we schedule brickwork, roofing and carpentry so each stage hands over cleanly to the next. That reduces clashes between following trades and helps keep the building watertight at critical points. Tell us your drawings and we will outline how the trade stages fit together on your particular job.

02

Practical Site Planning

Space for materials, scaffold and waste removal often constrains how an extension is built. We assess access routes and storage requirements early, and propose practical on‑site arrangements that protect your garden and existing property while keeping work moving. This reduces unexpected hold‑ups and helps neighbours understand what to expect.

03

Clear Scope From Approved Drawings

Work from approved plans makes it possible to price and program the construction trades accurately. We review drawings and flag where structural calculations, Party Wall awards or drainage adjustments will affect the build so you can arrange those services before groundworks begin. That clarity helps avoid mid‑project specification changes.

INSIGHT / House Extension Guidance

Planning Your House Extension Essential Insights

A successful extension depends on choosing the right type, planning access and making sure the trades responsible for the shell are coordinated from the outset. We explain what trade choices mean for your project and what to prepare before contacting builders.

01 / EXPLAINED

Assessing Property Constraints

Compact plots or restricted access will shape design choices and costs from the start. Map vehicle loading points and probable scaffold positions early on; narrow frontages, stepped approaches or steep driveways often mean materials must be carried by hand from the nearest practical drop‑off. Think about garden depth and boundary setbacks too — some designs that look good on paper need extra clearance to build without infringing on neighbours or requiring complex temporary works. Existing foundations and ground conditions influence what’s practical. For a double‑storey extension a structural engineer’s calculations will determine whether the current foundations need reinforcement, which changes the contractor’s scope. Where drains or other services run through the proposed footprint, diversion work is likely in the early stages; early contact between your designer and the contractor who will build the shell helps identify these items before tenders are finalised and reduces the chance of costly changes once work starts.

02 / EXPLAINED

Understanding Extension Types and Scopes

Decide the extension type by balancing desired space with site realities and budget. Single‑storey rear extensions are usually the simplest to build and often integrate with garden access, making them suitable for open‑plan kitchen conversions. Side extensions increase footprint but can be limited by boundary lines; they may also require reworking drainage and provide fewer options for scaffolding unless front access is available. Double‑storey options deliver more rooms per square metre of garden but increase structural complexity: new first‑floor loads may require underpinning or foundation strengthening and necessitate careful roof integration. Wraparound extensions combine rear and side builds to create a more flexible layout but multiply junction details where walls and roofs meet. Each choice affects the masonry, roof design and carpentry we will deliver, so weigh immediate needs against how the extension will feel and function once fitted out.

03 / EXPLAINED

Regulatory and Structural Considerations

Permissions and regulations shape what you can build. Some modest projects fall under permitted development, but larger or higher extensions often need planning consent and, in any case, building control sign‑off for structural work, insulation and fire separation. Structural calculations are commonly required where new loads are introduced or where openings are formed in existing walls. Party Wall matters also appear where work adjoins neighbours’ boundaries and should be dealt with before excavation begins. Practical roof issues include ensuring adequate falls, correct flashings where new and old roofs meet, and properly sized rainwater goods so the extension does not overload existing drainage. Early engagement with qualified designers and contractors who carry out the roofing and masonry phases reduces the risk of incompatible details being specified and helps ensure compliance with building control at handover.

AREAS WE SERVE

Coverage Areas

We cover St Albans and nearby towns across Hertfordshire including Harpenden, Hatfield and Radlett. If your project sits elsewhere within our coverage list, tell us your postcode so we can confirm whether we can assist.

DISCUSS YOUR LOCATION
01 / COUNTYHertfordshire
02 / COUNTYEssex
03 / REGIONLondon

START THE CONVERSATION

Tell us about the job and we will take a look

Send us a few photographs and your postcode using the form, or give us a call. We will come back to you, arrange a survey where one is needed, and set out in writing what we recommend and why before any work is agreed.

07803 569220 info@raptor-roofing.co.uk
EXTENSIONS / ENQUIRY DETAILS01 — 05

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QUESTIONS / HOUSE EXTENSIONS

Common Questions

Homeowners frequently ask about permissions, timings and what to prepare before builders attend. The answers below focus on practical implications for the trades that deliver the extension shell.

ASK ANOTHER QUESTION
01Do I always need planning permission for a house extension in St Albans?

Not always. Some small extensions may qualify as permitted development, but whether yours does depends on size, height, proximity to boundaries and other factors. Check with St Albans City & District Council or your designer before instructing builders. If permission or neighbour notifications are needed, arrange those before structural work begins so the trade scope reflects approved drawings.

02How long will my extension take to complete?

Timescales depend on complexity, access and ground conditions. We cannot confirm durations without reviewing drawings and surveying the site. Expect single‑storey shells to be quicker than multi‑storey or wraparound builds. Ask us for an indicative programme after we’ve seen the plans and surveyed access so material lead times and sequencing can be included.

03Will you handle planning and design for my extension?

No. We carry out the construction trades for extensions but do not provide architectural design or submit planning applications. You should appoint an architect or planning agent for drawings and permissions. Once you have approved plans, we will review them and explain the scope of roofing, brickwork and carpentry work required and whether any specialist structural reports are needed.

04What information should I have ready before asking for a quote?

Provide the property postcode, photos showing the proposed extension area, any existing drawings or planning notices, and details on access restrictions such as narrow gates or limited parking. Also note where skips can be placed and whether there are buried services or drainage runs over the proposed footprint. The more accurate the information, the tighter the trade estimate we can issue.

05What risks should I be aware of during construction?

Common risks include unexpected ground conditions, hidden drainage or services within the build footprint, and discovery of inadequate existing foundations when upgrading to a double‑storey. Restricted access can increase handling costs. We flag these possibilities during a survey and advise when a structural engineer or additional site investigations are advisable so you can budget for any necessary remedial work early.

06How will you manage neighbours and site disruption?

We plan deliveries, scaffold locations and working areas to limit inconvenience and will provide neighbours with contact details if requested. Early communication helps reduce complaints; we also protect garden areas and the existing house during works. If a Party Wall Award is likely, arrange that process before we start to avoid disputes that could interrupt construction.