Helen Mulligan, Owner
Capel Manor trained garden designer.

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Helen Mulligan is the founder and lead designer of Tilia Garden Design, a friendly and creative garden design and maintenance studio based in High Barnet, North London. After a successful career in marketing, Helen followed her passion for nature and retrained at Capel Manor College, earning her Level 3 Diploma in Garden Design.

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She specialises in sustainable, natural gardens that feel calm, welcoming, and full of life. With a commitment to organic practices and supporting local wildlife, Helen brings thoughtful design and genuine care to every project. Tilia Garden Design is proudly female‑led and offers a warm, personal approach to creating beautiful outdoor spaces.