Swimming Pool Installation in London & the South East
We are not the cheapest pool company in London. We are, however, the one you will still be glad you chose fifteen years from now.
Building a swimming pool is one of the most complex construction projects a homeowner can commission. It sits at the intersection of structural engineering, waterproofing, mechanical and electrical systems, tiling, and — in London particularly — the logistical constraints of urban construction: restricted access, clay-heavy ground conditions, proximity to neighbouring structures, and the perpetual challenge of getting specialist materials and plant onto sites that were designed for Victorian terraces, not concrete pumps. Most pool companies describe themselves as specialists. Fewer have spent the better part of three decades developing the specific expertise that separates a pool built to endure from one built to a price. We have. And the difference, while invisible on the day of handover, becomes apparent over time — in pools that stay watertight, that cost what we said they would cost, and that are still performing without major remedial intervention twenty years later.
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What we actually build — and why it matters that we specialise
The Swimming Pool Company builds bespoke reinforced concrete swimming pools. That is the entirety of our construction offer — we do not install fibreglass shells, prefabricated steel panels, or above-ground timber frames for clients who want a luxury pool. This is a deliberate choice, not a limitation. Reinforced concrete is the only construction method that allows complete freedom of shape, depth, wall profile, and finish. It is the only method appropriate for basement and underground installations. It is the method that produces a pool capable of lasting the lifetime of the property when correctly specified and built. And it is the method that demands the deepest technical knowledge to execute correctly — in the mix design, the structural reinforcement, the curing regime, the waterproofing specification, the joint details, and the integration of every mechanical and electrical element that passes through the shell. We know this method with the thoroughness that comes from 25 years of building nothing else. That knowledge is what you are engaging when you choose us.
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Our scope covers the complete installation from structural concrete shell to final water chemistry commission. We design and manage the pool structure, waterproofing, tiling, filtration, plumbing, heating, ventilation for indoor pools, LED lighting, and electrical installation. Groundworks — excavation, soil disposal, and compaction — are coordinated with your main builder or contractor, and we manage the interface directly. We work with architects, interior designers, structural engineers, and principal contractors on a daily basis, and we are experienced in the specific demands of collaboration on high-specification residential projects where the pool is one element of a larger build programme.
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The problem with how most pool companies sell — and how we do it differently
The conventional approach to selling a pool goes like this: the sales representative visits, listens to what you want, and produces a headline price designed to secure your interest. The detail comes later — in variations, in 'extras' that turn out to be core requirements, in programme delays while decisions that should have been made before the contract was signed are made under construction pressure instead. Anyone who has commissioned a significant building project has encountered this dynamic. It is especially prevalent in the pool industry, where the technical complexity of the product makes it easy to obscure scope and to present an apparently comparable quote that is, in fact, specifying materially less.
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Our quoting process works differently. Every quote we produce is itemised at component level: the concrete specification and quantities, the waterproofing system and its application method, the tile product and adhesive system, every pump, filter, valve, fitting, and electrical component. You can read down our quote and know exactly what you are paying for — and you can compare it, line by line, with any other quote you receive. If a competitor's number is lower, our itemised quote will show you precisely where the difference lies. Sometimes the difference is a commercial decision on margin. More often, it is a specification decision — a thinner waterproofing membrane, a lower-grade tile adhesive, a single-speed pump where we have specified a variable-speed drive. These are the decisions that determine whether your pool performs correctly for twenty years or begins to develop problems within five.
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Our contract price is our contract price. We have never issued a variation notice on a project where the client had not changed the scope. That record matters more to us than any marketing claim we could make.
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Why experience produces better pools — not just more confident contractors
Twenty-five years of building pools in London produces a knowledge base that cannot be acquired any other way. It accumulates in the form of decisions made correctly on the basis of prior experience: the recognition that the clay soil conditions on a particular site in West London require deeper compaction beneath the shell slab than the structural engineer's standard specification; the understanding that a particular type of mosaic tile, when installed with a specific adhesive in a pool that cycles between heating and cooling daily, has a different long-term performance characteristic than the manufacturer's data sheet suggests; the ability to read a set of drainage survey drawings and identify, before excavation begins, that the proposed pool position is going to intersect a drainage run that is not marked on the as-built record. None of this knowledge is available on a course or in a manual. It is the product of having built enough pools, in enough different conditions, to have encountered the full range of things that can go wrong — and to have developed the systematic practices that prevent them.
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Our team includes engineers and technicians who have been building pools with us for over a decade. The tile installers who work on our projects have laid tens of thousands of square metres of pool tile. The waterproofing applicators who we use on every project have applied the specific crystalline and membrane systems we specify on hundreds of pool shells, and they understand not just how to apply them but why each element of the system is specified the way it is. This continuity of team is not incidental to quality — it is the mechanism through which quality is delivered. A pool built by experienced, consistent specialists who understand the entire system they are working within is a categorically different product from one assembled by subcontractors who have been briefed on their individual element but have no investment in how the elements interact.
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How our Swimming Pool builds actually unfold
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Stage one : design and engineering
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We begin with a site survey: access assessment, ground investigation where required, review of existing drainage and services, and a detailed discussion of your brief. From this we produce a design proposal including 2D plans, 3D visualisation, and a full structural specification. The visualisation is not a sales tool — it is a working document that you and we use to make all the decisions that should be made before a contract is signed: shape, depth profile, step and ledge positions, coping and surround materials, filtration plant room location, cover specification, and all the finish options. When the design is agreed, we produce engineering drawings for structural reference and for submission to your structural engineer if the project requires independent structural sign-off. All of this is included in the consultation process, at no charge, before you commit to the build.
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Stage two : shell construction
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The shell is the foundation of everything. Our reinforced concrete shells are constructed using either in-situ formed concrete or sprayed concrete (shotcrete) to the structural specification, with a reinforcement cage designed for the specific loads and ground conditions of the project. The concrete mix is specified for water-resistant concrete construction — typically a C35/45 mix with a low water-cement ratio and appropriate admixtures for workability and durability — and curing is managed to prevent early-age shrinkage cracking, which is the most common and most preventable source of shell defects. Before any waterproofing or tiling begins, the cured shell is inspected at every surface and every penetration detail: any defect is addressed at this stage, not concealed under subsequent layers. This inspection is a formal hold point in our build programme, and we do not proceed beyond it until the shell meets the standard we are prepared to guarantee.
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Stage three : waterproofing and pressure testing
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We apply a multi-layer cementitious waterproofing system to all internal surfaces of the shell, with particular attention to movement joints, penetration interfaces, and changes of plane — the locations where the overwhelming majority of pool leaks originate. Once the waterproofing has reached full cure, the pool is filled to operating level and pressure-tested over a minimum of 72 hours with all circulation valves closed. Permissible water loss under test is no more than two to three millimetres per day, corrected for evaporation. A pool that does not pass this test does not proceed to tiling. There is no exception to this rule. The pressure test record is documented, retained in the project file, and provided to the client as part of the handover pack.
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Stage four : mechanical and electrical installation
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Filtration, plumbing, heating, ventilation, and electrical systems are designed as an integrated whole, not assembled from independently selected components. The hydraulic design — pipe diameters, pump sizing, flow rates, turnover calculations — is produced to deliver the specified water quality at the lowest practical energy consumption. Variable-speed drives are our standard pump specification: they reduce electricity consumption by 50 to 70% compared with fixed-speed equivalents and extend pump service life through reduced mechanical stress. Chemical dosing is automatic, with electrochemical probes controlling both disinfectant residual and pH continuously. For indoor pools, the environmental control system — dehumidification, air handling, and heating integration — is designed by mechanical engineers to a moisture load calculation, not estimated from a rule of thumb. All electrical work is executed by NICEIC-registered engineers to BS 7671 Section 702 requirements, and a full electrical installation certificate is provided at completion.
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Stage five : tiling and finishing
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Tiling begins only after the waterproofing pressure test has been passed and signed off. Adhesive systems are specified for full-immersion wet environments to EN 12004, applied using the double-buttering method on all submerged surfaces to achieve the minimum 95% coverage required for permanent immersion. Grout is polymer-modified or two-part epoxy, depending on the project specification. Movement joints are formed at all changes of plane and at penetrations, filled with flexible polyurethane sealant colour-matched to the grout. The pool surround — coping, decking, and any associated wet area — is completed to the same standard and with the same attention to the drainage falls, slip resistance, and thermal expansion details that determine long-term performance.
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Stage six : commissioning and handover
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Commissioning is not filling the pool and handing over the keys. It is the systematic process of setting and verifying every operating parameter in the installation: pump speeds and flow rates, chemical dosing set points and calibration, heating system controls, cover drive limits, lighting scenes and control system programming. We run the pool through its full operating cycle under our supervision before declaring it complete, and we remain on site until you are satisfied that every system is working correctly and that you understand how to operate it. The handover pack contains the pressure test record, the electrical installation certificate, all plant and equipment manuals, the maintenance schedule, and the terms of the ten-year structural guarantee. That guarantee covers the concrete shell and waterproofing system — the elements of the build over which our specification and workmanship have direct control — and it is backed by our professional indemnity and public liability insurance.
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The kind of projects we are best suited for
Our work is concentrated in the segment of the market where the pool is a significant architectural feature of a premium property — where the client's priority is a result that performs flawlessly and looks exceptional, rather than one that comes in at the lowest possible cost. Our clients include homeowners undertaking major residential improvements in London and the South East, architects and interior designers working on high-specification new builds and renovations, and property developers for whom the pool is a key differentiating feature of a prime residential product. We work well in these contexts because we are used to the level of coordination, documentation, and programme discipline that complex residential projects demand. We are comfortable working under the management of a principal contractor, alongside a design team, and to the standards required by a client who will be scrutinising the result closely.
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We are probably not the right choice for a client whose primary criterion is the lowest possible price. There are pool companies in London who will build a concrete pool more cheaply than we will — and some of them will produce a perfectly serviceable result. The difference is in the consistency: we apply the same specification, the same hold points, and the same standard of finish on every project, regardless of its size. A client commissioning an 8m outdoor pool receives the same waterproofing system, the same pressure test, the same adhesive specification, and the same commissioning process as one commissioning a 14m basement pool. The price reflects the scope of the work. The quality does not vary.
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Twenty-five years is long enough to have seen what happens when corners are cut. It is also long enough to know exactly which corners matter and which ones do not. That knowledge is the real product we sell.​