Septic & Wastewater System Design in Marlborough

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Building where there’s no public sewer, or replacing an old septic system? We’ll help you work out what suits your property. RISEN designs wastewater systems for homes, businesses and rural sites across Marlborough and the Sounds, taking account of the land, how it’s used and Council requirements.

What the Design Process Includes:

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• Site Evaluation: We visit the property and check the soil, slope, available space, access and expected wastewater flows. That helps us work out which type of system is suitable.

• System Selection & Design: We explain the options and design the treatment and land application system to suit your property and the requirements that apply.

• Council Documentation: We prepare the design, calculations and plans for your building or resource consent, and answer Council’s technical questions along the way.

• Land Application Design: Options may include septic tanks with trenches or beds, or secondary treatment systems discharging to drip irrigation or other suitable land application areas.

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Early advice can save changes later. Get in touch before settling on a house location or buying a treatment plant. We’ll talk through the next steps and can also help with contractor pricing and installation coordination.